6.5L fuel system

An in-depth overview of how the injection and fuel system on your6.5l turbo diesel equipped with a DS4 injection pump works. Please feel free to leave feedback, questions, and comments below. Thank you for watching
PLEASE! Feel free to get ahold of me anytime with any questions, comments or concerns 👍
Instagram: @jessp_7795 and @idilegends
Facebook: Jesse Pelkey and idilegends
Feel free to check out the websight We would greatly appreciate it, thank you!

[@bradconner3499]

My truck has been a nightmare,just went through rebuilding the motor due to spun bearing now I'm having fuel issues someone else put the fuel pump in and now I have to go through the whole fuel system and your video is hands down the best one I've found trust me I've seen a lot,I know the whole history of this motor , and I'm well on my way to becoming a diesel mechanic. Great job man and thanks

[@JessePelkey1]

No problem man, glad I could be of some help, by chance did you ever find out what was going on?

[@PoppyMod]

I'm a complete novice when it comes to the 6.5L diesel in my '99 Suburban C1500. Your VIDS are the best! Your audio is great and explanations are very clear. Thanks for such a great helpful Vid!

[@un-limited7009]

Thanks for the Video. I bought a 98 & 94 Cheyanne 3500 HD. Both need a lot of work and your videos are a big help. I use to work for Detroit Diesel rebuilding 8-V 92's and 71's & 60 series. 6.5's are a total different Motor. The block looks like a big block gas engine to me. Thanks again.

[@JessePelkey1]

Thank you for taking the time to watch man, I appreciate it 👍 love the old 71's just a nostalgic motor for sure, and the 12.7L 60series are great, 14L as well. 6.5l is a totally different beast for sure 395 cubic inches of indirect injection, clangy, leaky beauty hahaha

[@hellcatdurangobuild4526]

@@JessePelkey1 need ur help man my 6.5 won’t start

[@billmnfl]

Thanks Jesse. I'm going to have to watch this about four more times to be able to grasp all of the information you just gave us. I'm looking at a 2001 Safari Trek RV with a 6.5 liter engine in it. They say it ran when it came in but it's been sitting a year and it won't start. I'm going to look through your videos on hard starting or no start.

[@joestone2068]

Thanks again Jesse for an outstanding very informative video as usual you always seem to knock it right out of the park. You are definitely like a walking computer when it comes to these trucks and 6.5 Thanks brother👍

[@JessePelkey1]

I appreciate it Joe thank you, I'm no expert on these ol' motors, just trying to help y'all out with the info I have picked up over they years that has helped me fix the ones I have worked on.

[@tedshapiro2496]

Hats off to you, Jesse! Wow, talk about knowledge coupled with the ability to convey it!

[@truckie117]

Had to replace the o ring in optical sensor because I saw a leak then I saw a leak in the fuel shutoff relay waiting to replace that. I believe this happened because I put in a new fuel tank and pickup with new lines up to the ffm and increased fuel line size all the way to the injection pump. It took me so long to do because I'm old and by my self I think the o rings dried out because the fuel was drained from the system. Great video's keep it up. 99 Suburban Feed the Beast New ffm to match feed the beast. Quadstar metrim rod pickup New fuel tank and lines

[@koolaidman6462]

Great video! My fuel pump just started going out, hasn't quit completley but noticed it isn't making the usual noise when first turning the key on and started stuttering on the interstate coming home. Made it home, and parked it until I get it replaced.

[@jeffryrafaelm78]

I wish there were knowledgeable people in ontario Canada when it comes to these motos ... thanx for the vid very informative 👍

[@JessePelkey1]

No problem man, happy to help

[@Dark_Knight_USA]

Greetings: Interesting concept: Early diesels have remote fuel pump... sucking and pushing. Diesel being thicker than gasoline has fuel pump in tank sucking a little and pushing farther. Just a thought. Thx 4 the share.

[@12yearssober]

This is the most detailed explanation of the fuel system i have ever seen. My only complaint is the background music. I dont know why the trend is to have the music. I wish the trend was over. Other than that awesome stuff!!!

[@JessePelkey1]

Thank you Sir, I do appreciate your kind words and feed back. Your points are valid about the music and I do agree with you. This video is on the older side and my current videos no longer use music, or very little music at the very least. Again thank you for your feedback and for watching.

[@almaljones9584]

ALJO, Thanks Jesse for many questioned answered. I have a 95 6.5 on a K2500 frame. I had heating problems, both heads had cracks in them. This engine was replaced about 40 kmiles ago. I have had this truck since Oct 2002. It has had some problems since Oct 2005. I have just replaced both heads with new heads from a E-Bay source from Kannapolis, NC. $437.00 each. have it back together and no fuel from the Injector pump. it squirted one time on #3 and that is all. I have a new PMD that will be here Wed. the 3rd of Aug. The engine was not having any running problems except for the overheating. The fan on this doesn't turn on until 210 degrees and that is a problem when I tow. Haven't checked codes but that is next. Thanks for very good videos !!.

[@Howdy_Heavyfoot]

really appreciate youre content. have comment before. have my own 94- k2500 6.5 td. and tryin to learn and learn and snap up good things to do like pmd, lift pump, change fuel filter etc. so youre doin a really good job with these videos, skip the music when you do the talk, easier to hear. love youre trucks also :D . greetings from stockholm sweden :D

[@JessePelkey1]

I appreciate you taking the time to watch the videos man thank you, just bought two more trucks and I got to go get the other one this weekend so now we have a total of four 6.5l's hahaha

[@charlescrocker6441]

Great job on videos, I’m new on your sight and I have a new truck with a surge upon acceleration cold only

[@JessePelkey1]

Thanks man, I appreciate it. A surge at acceleration while the engine is cold is most related to the cold start function and timing. When the engine is cold, the ECU in conjunction with the engine temp sensor and the injection pump, Increases the timing of the injection pump electronically in order to bring the engine up to optimal running temp faster and once the engine is at or above 180 degrees it will retard the timing back to normal. What may be happening is that the injection pump is slightly out of time and is causing a studder at cold but just enough in time to run correctly once the engine is warmed up. By chance do you know of the injection pump ever being replaced?

[@BAD_BREED_ALLIANCE]

I thought your video was extremely thorough, very helpful

[@andrewbeveridge3006]

Amazing video, as usual... every video has helped me with my 95.

[@andrewbeveridge3006]

And would like to see a video of the mods you've made to your truck

[@JessePelkey1]

I'm glad the videos are of help Andrew, if there is ever a topic on these motors you'd like to see in fuller detail just let me know and I will do my best 👍 thank you

[@andrewbeveridge3006]

Currently working on my 95 GMC 2500 4X4 xtra cab long box.. only 242,000 kms, from a heavy duty mechanic. Wife driven, hahaha

[@JessePelkey1]

@@andrewbeveridge3006 nice!

[@willjohnson211]

Since I put a new lift pump on my 6.5 I’ve been getting fuel housing leaks so I’ll be putting a new fuel filter setup soon

[@josegilmeralvarezb.5309]

Thank you.... Excellent explanation!

[@jamesburch8230]

I have a GMC Rally and it smokes and give off exhaust fumes badly I have to start it with a little gas till it warms up it doesn't have a turbo only 100500 miles love this motor and van 1996 Rally sport 2500 oh yeah the fuel pump is on the block also it sit.up a year are so get most of my knowledge about this van is from you I felt like I needed to send you a comment on my issues thank you for your videos

[@keithcochran392]

Hello haven’t seen any new 6.5 videos lately. Hope all is well. A while back I wrote about a sputter my 6.5 had a around 1500 RPM. Happy to report I found the issue. Had two bare wires touching. Wires for FFM heater. Now sputter is all gone. 🤗. Just wanted to share & let you know I love the 6.5 videos. Thank you for sharing your knowledge on the 6.5s. Also are you still going to do a video on running WVO & or USED ENGEN OIL in the 6.5?

[@JessePelkey1]

That's awesome man glad to hear that you're able to get her back on the road and find the issue and also happy to hear that it was as easy as just a couple crossed wires. Been super busy lately being first time Dad so videos haven't been put out recently but I'm getting back into the swing of things.

[@tylermcbride2158]

Jesse i love your videos man! Would you recommend doing a FTB mod for a stock engine? Might upgrade the turbo down the road but it will be mostly used for commuting and maybe towing every now and then but not a lot of weight. Thanks for the input!

[@JessePelkey1]

Hey there Tyler, thank you for taking the time out of your day to watch the videos man I do greatly appreciate it. And absolutely any mod that involves keeping the injection pump properly fed is definitely a mod I would recommend. It'll prevent injection pump catastrophe, help keep it well lubricated and fed and overall prolong the longevity of your injection pump added that you do away with the stock lift pump and later go with an aftermarket one as well 👍

[@13yearsaprepperr.jtilbury.51]

Jesse , dont forget the return pipe ,, If there is a blockage at all the IP wont build pressure as the poppet valves wont close , we had a 65 in (Tow truck ) the return line was blocked solid , Easy fix new line back to the Tank , Rob NSW Australia

[@JessePelkey1]

Completely agree, forgot to mention it in the video but luckily y'all are awesome and help me out in the comments when I miss things, and I appreciate it a ton 👍

[@grindersandgears3445]

I'm still chasing a drivability issue after new LP and feed line, what would cause/how does the return line clog? Could I check for that, by letting the lift pump prime and disconnecting the return to see if I have flow? I assume with the engine off once it has prime that the fuel just bypasses back through the return?

[@geloradananrlyeh8495]

What kind of replacement fuel lines did you use on your truck? Someone told me that you had to use a special kind for diesel or they deteriorate from the inside over time. I didn’t find much discussion about this except that you shouldn’t use regular neoprene lines. Thanks in advance!

[@raymundosaldana5898]

Great video

[@ShadowOppsRC]

30 dollar filter is cheap insurance to keeping crap out of the fuel system! I do the 6 mile interval too. Since I do my own maintenance I just change the filter every other oil change.

[@mojavexploder]

Just bought a 94 k2500 6.5 pmd already relocated upgraded water pump and duramax fan manual wategate set at 8psi

[@dhealy3]

Great learning tool. I'm a real amateur and you taught me so much. I have an 03 Workhorse with a 6.5. I bought it non running. Added a new FPD on an extension mounted in front of radiator. Yesterday I relocated it back to the original location (on top the intake) where it originally causes overheating. However I'm worried about it overheating again. I'm considering adding duct work and fan from front to the fpd on top the intake. Any suggestions?

[@JessePelkey1]

I would get a new extension harness with a heat sink and mount it down behind the bumper, that would be the coolest place for it.

[@Rational_Party]

FWIW, I've had a couple 6.5's. Never relocated the PMD and never had an issue. I don't run the engine cover, which seems like it would trap heat in the area of the PMD. I wonder how many PMD issues were caused by the cover and perhaps a fan clutch that was not working well...

[@JamesBrown-r8v]

Love your videos bud have learnt a lot about my 6.5 from watching. I just had a shop install new l p on my 96 chev 6.5 and I now have a paracitic draw of power and keeps killing my batteries. Never had this problem prior to new install what could be problem do you think could be causing this thanks for any tips you can give me. Cheers

[@johngregory3050]

Thanks your information was on point

[@JessePelkey1]

Thank you man for watching the video and your feedback 👍

[@moof7010]

excellent video many thanks

[@JessePelkey1]

I appreciate you taking the time to watch the video man, and thank you for your feedback. I do greatly appreciate it 👍

[@user-pj5zf3ju2t]

Hey how you doing my name is Jorge I learn love from the videos I got a few questions if you don’t mind asking it it’s about my truck to Gord diesel 1998, 6.5

[@JessePelkey1]

Ask away man.

[@mtebaldi1]

I know this is an old video but did it make sense to spend the money on the FTB Mod since you installed the Fast165 feeds more fuel than FTB Feed The Beast.

[@WingspeedGarage]

Great video! I guess it’s at 4:19 it converts from hardline to hose ?

[@dillanmcadams3494]

Thanks for all the info! Love your videos. Currently trying to fix up my 94 k2500 I got not to long ago. Fuel line is rusted and leaking so I'm going through the whole fuel system. Also do you know if ssdiesel supply is quality parts?

[@JessePelkey1]

I have had decent luck out of ssdiesel, and thank you for watching the videos man, I appreciate it 👍

[@Becker4108]

Nice videos. I have a 97 c3500. Question: I have 9 psi at water drain test T? Is that too high?

[@JessePelkey1]

thank you. And as far as the fuel pressure, no it isnt too high, but you wouldnt want to go much higher or you could blow out the seals in the injection pump.

[@rickvenlo1362]

Hi No response to throttle (gas pedal)

[@jeffwebber4816]

im running into the heat synced issue. starts cold fine, and runs fine, but once warm and shut off for 20 mins, she will only crank but will start 2 hours later. any ideas? thanks!

[@rchuntlsl]

How do you get air out of the system? Changed the rubber fuel line going to the pump and started for a sec then quit and has not restarted. The issue is air. How do I bleed the fuel pump/system.

[@roberttalebli4869]

My GMC van just shut down going down the hwy and it won't start back up it crancks but does not start , I changed out the pmd and still having the same issue I can hear the glow plug relay switch clicking and the lift pump is priming what could be my issue? no engine light coming on where should I go from here? It ran great for many years without any issues it started shutting down just idling or in gear @ low speed, It was running @ 70 miles per hour and all of the sudden it shut off and will not cranck back up.

[@user-dk1cd4xc7c]

😂Thank you for your time and I have a question? Have a 95 Chevy 6.5L turbo pervious owner choose to change the trans installed a 400 turbo manual shift???? Having all this done all the electronic plugs and electronics shift plate are available would this mortified nightmare have a problem with delivery of fuel ⛽ ???HELP

[@JessePelkey1]

Potentially, not 100% sure but I would imagine the truck would have a difficult time monitoring fuel delivery through the RPM range and shift points. Considering those wiring harnesses on these truck do require proper grounding and if the plugs aren't going to anything anymore than I'd say its likely.

[@brandoncannon3082]

Is it possible to convert the electronic fuel control to mechanical? I have a P30 all mechanical fueling that I would like to put on 3500 electric.

[@JessePelkey1]

Just to clarify, by "fuel control" are you referring to the injection pump? If so then yes you can.

[@ESLinsider]

I just got a 2003 6.5 old USPS step van and one thing it does is sort of stutter while driving and the engine has even shut off on it's own while driving a couple of times. The stutter or hiccup is usually going over 40+mph and then it suddenly stops accelerating for an instant or even a couple of seconds. It's random as to when it happens, but one stutter is usually followed by 2 or more. The times it shut off on it's own were followed by really low power. But after it shut off I was able to restart it no problem. I got the codes P0216 and P1216. Any ideas? It has a new lift pump, fuel filter, and air filter. Thanks for breaking down the fuel system.

[@denismorissette419]

Tanks Jesse. I have a question for you: I had to change the glow plugs and repair the glow plugs wiring on my 94 Silverado K-2500 and I decided to replace the injectors at the same time. It has 210,000kms and was running good on 8 cylinders and I changed them has preventive maintenance. I bought 8 brand new Bosch injectors. So now I hear a combustion knock at idle and it seems to be on only one cylinder. It was not like that before the job. And beleive me, it's a combustion knock, not anything mechanical. But as soon as I increase the RPM and only by a couple hundered the knock stop. It happen only at low idle. I got very good quality fuel, and no code except code 12 that means no code. No engine shaking at all, runs evenly on 8. I was worring about maybe a particules of dirt went inside the injectors when I reconnecte the lines but it runs well. Do you have a clue?? Tanks a lot for your help!!

[@JessePelkey1]

Hey there Dennis, so what may be happening in a run into this a few times is that where you put new injectors on with all new tolerances, new spring tensions, so on and so forth. And where the injection pump has been on the truck potentially since 1994, the pump itself has more wear and tear on it than the injectors. Well maybe happening is the pump, though it may have been able to make enough pressure for the old injectors, might not be enough in order to get the new injectors to fire off properly.

[@scotttyson4160]

My RPM doesn't work on my cluster and my fuel gage is stuck on full I replaced the sending unit but still no luck any suggestions..?

[@JessePelkey1]

Could be the cluster itself. These trucks are getting older and its not uncommon for electronics to fail.

[@HughsBest]

Would seriously love to chat with you. Having serious issues with my '97 6.5. going on 2 years now trying to work through figuring out my issues with the truck.

[@edreeher2210]

i have a 95 6.5. someone put crude oil in it and left it sit for a year. now, it wont stay running. replacing the filter this week. what else do you think i should do?

[@JessePelkey1]

Unfortunately, trucks equipped with a DS4 injection pump are very sensitive to any particulates that aren't found in conventional diesel. The optical sensor is more than likely compromised

[@MCSDumpTrucking]

does anyone know where i can get new lines from tank to motor

[@survivalburban1597]

hey Jesse pelkey I have two codes that keep popping up and they are p0370 p0251 I threw a p0335 replace the CPS and still throwing the other two I checked all my grounds I been doing the same thing drive to work and home filled up 75 worth of diesel and drove for an hour and then drove home next day started it to go get coffee and some parts for other projects and then bam code pops up going up 25% grade and I make it to the top but then I went no where nothing I had these 3 codes thats it

[@JessePelkey1]

Hey man, Could be early signs of the optical sensor going out, or if you have an optical sensor filter harness it could be starting to fail as well. Dirty fuel can cause the code if there is and debris getting in-between the optical sensor and the pickup ring inside the injection pump.

[@robertrinard9784]

I can't seem to find out where to check the fuel pressure from the injector pump to the injectors on the 6.5.

[@JessePelkey1]

You will need to take the feed line off the top of the injection pump from the lift pump and install an inline pressure gauge. That would be the most accurate place in order to get a reading directly at the injection pump.

[@robsycko]

Surging, Will check the resistor tomaro It might have fell out?

[@JessePelkey1]

It's not likely it would fall out if there was one in there, the plug and the friction of the pmd prongs pretty well keeps it in there but there is a possibility it went bad if there is one installed

[@richardlarocque236]

Hello there, so I just had to change my head gaskets in my 95 6.5 turbo now everything is back together but will not start. The funny part is that when the gasket failed the motor still ran fine now it won't start. Any ideas?

[@JessePelkey1]

Double check all the connections make sure you're not missing anything any of the ground stuff like that it could be something stupid like some paint on the new heads (if you got new heads or repainted them) or even the glow plug controller not working

[@user-qi8tx1do1o]

Where can I get marine parts for my 65 like a decent lift pump fuel filter system

[@polaris6644]

Trying to figure out some of the routing, the little rubber lines off the injectors all join on the small steel lines , then are conjoined and go right back to the tank? no other steps? Just need to know when I install my aftermarket filtration setup to replace the stock FFM

[@JessePelkey1]

Yes, all of the little rubber return lines go from inject to injector then to a hard line shaped like a big t up to the front of the motor. The hard line goes under the intake to the back of the motor then connects to a runner line that dips between the cab and the block, then back to a hard line that leads to the tank.

[@robey60]

Hey Jesse! I have a 1994 K2500 that is all original. It also has a lot of problems with the engine. A friend said, since I have to get a new or reman motor, to go with the Duramax LB7, which is about the same cost for the long block...I've read a lot about the Detroit Diesels having block cracks, crank breaks, and DS4 issues. I'm 62, Disabled Vet, and I still do all my own work...I'm wanting to build this as my last truck that will actually outlive me...what do you recommend?

[@JessePelkey1]

Hey there Phil, I see the dilemma that you're running into and and all actuality I would weigh the pros in the cons. The 65 is reliable but it does suffer from the dreaded main web cracking issues no matter which block you go with, it's cheap and easy to fix and it has enough power to get the job done. Doing an lb7 swap you'd have to take into consideration that it will be more expensive to fix any parts that will break, you'll have to consider getting good injectors because the lb7 unfortunately was bad about the injectors but a good set of Bosch will really bring me motor around. There will definitely be some modification where the Duramax was never equipped for the GMT 400 platform, wiring, remembering the VIN to be able to order parts properly for the engine, so on and so forth. All of that aside the lb7 is a great motor and has awesome power, definitely more power than a 65 stock for sure. If it were me in all honesty if you're wanting to keep the truck I would just put it right back to stock and run the wheels off it, or fix it and sell it and buy a Duramax. Unless you were able to take on the task of swapping then I would say go for the swap the GMT 400 trucks are a solid platform and the lb7 Duramax is a solid engine and would definitely serve whatever purpose you wanted it to serve well. But I would just weigh the options as far as what are you going to do with the truck is it worth it for you to do the swap stuff like that. I know I'm not much helping making this decision but I hope that was more or less the answer you were looking for. 👍

[@stevepesce3093]

Jesse when you have time I would like to talk to you about a 6.5 97 GMC Sierra pickup truck that I own I am having problems with my fuel pump I replaced my lift pump I was not aware of when I replace my fuel filter to fill up the housing I was not knowledgeable about the diesel engine getting air in the system at one point. My front strap on my fuel tank fell down and since then I've been having problems with the system now somebody told me to change the sock out on the fuel pump inside the tank the truck starts right up in the morning runs great throughout the day but blows a lot of black smoke if I get on throttle it did not do that until I had errand assistance you have time to comment I will thank you for your comment and hopefully the comment you send me will help me out thank you sir God bless

[@Varietystudios897]

Where do we get the software from? I have a 2000 chevy 3500 6.5 diesel

[@JessePelkey1]

Use to be able to get it from the Leroy diesel's websight

[@mr_mingo_county2802]

Hey man I really need your advice so bad

[@JessePelkey1]

Sure thing man, watcha got going on?

[@philjanzen3367]

I have a 1998 chevy 6.5 ran great shut it off can't get it running it will turn over but won't start

[@JessePelkey1]

Are you getting fuel up to the fuel filter housing when you turn the key?

[@eddieanna3004]

Where to get marine injectors I have a 1998 gmc 6.5 and it takes for ever for it to start everyone tells me it's my injection pump it's very hard to start

[@JessePelkey1]

Quadstar tuning I believe has them. But I wouldn't put it past the IP or PMD starting to go out. Check and see if the're any codes available and go from there.

[@donaldcampbell4238]

Hay Jessie I have a problem with my 1999 GMC 3500 he 6.5 no fuel at injector I relocate new pmd enter injector pump non to injectors what first should I check

[@staym925]

Can I take a cable driven 6.2 injection pump and put on a 6.5 drive by wire engine with mods? I have a cucv m1009 blazer with 6.2, and like take the 6.5 turbo diesel I have and put in it and use the 6.2 injection pump.

[@fernandovitor7192]

Have any info on wiring or the electronics on the Ds4 pump ?

[@chrisrogers3488]

Hey jesse big fan of the channel. Having some fueling problems with my 96 k3500 wondering if you could give me any wisdom. I hot wired the fuel shut off and lift pump and I’m having an issue with it firing and shutting right back off. If i bleed the system at the valve on top of the water neck it’ll run for about 5 seconds and then goes back to only running for about a second maybe 2. Any advice is greatly appreciated

[@JessePelkey1]

Hey man, may I ask why you hotwired the shut off? was it not working or did you do it as a diag feature?

[@chrisrogers3488]

Trying to diag I think I figured it out tho. I’m pretty sure it’s the anti theft

[@JessePelkey1]

@@chrisrogers3488 gotcha

[@chrisrogers3488]

I tried the key on key off procedure but it didn’t work so im not sure if it’s the sensor in the column or the ignition switch or what

[@JessePelkey1]

@chrisrogers3488 haven't said anything about codes at all, by chance have you tried to see if there are any available?

[@christopherpenuel750]

I have a 1998 c2500 6.5 I’ve got a question, what would cause a slight miss every once in a blue moon, it’s like a stutter at idle I’ve owned it a yr and it’s done it 2 times, truck only has 100k all original crazy clean.

[@Arson186]

My 6.5 hard to start takes a while to start after glow plug go's out and after running takes a while what could it be

[@JessePelkey1]

When was the last time they were all changed out? I actually have a video on the glow plug system if you're interested.

[@markmanha2440]

Hello, was wondering what brand of fender flares you have on your truck? Thanks

[@JessePelkey1]

Bush Wacker pocket style 2" flairs 👍

[@edkerkhoff522]

I havw a 95 GMC just put in new reman working great but keeps stuttering and shutting off on me. Today i replaced the lift pump remote pmd and installed secondary fuel filter but have same issue. After watching ur vid I'm thinking it's the injector pump or oil pres switch or crank shaft sensor. What u say? Thanks love ur vids on the 6.5

[@JessePelkey1]

It very well could be, by chance when it starts acting up is there any codes at all? Or are you able to start it right back up after it dies?

[@edkerkhoff522]

Starts right back up i plan to to do that optical wire harness elimination nxt and then prob oil pressure switch and crank case sensor b4 i look at replacement of injection pump

[@edkerkhoff522]

No problem on cold start normally gives problem after bout 30min run time

[@glidden1990]

P1656 code ? How to tackle that ?

[@brentbeaverbones1595]

I bought one with 440km what do I do with it buddy

[@JessePelkey1]

I have a play list of things you can do, more or less bomb proofing a 6.5l

[@oleg9782]

I bought myself a step van with 6.5L in it it a non turbo version. However when I bought it there was a water in the tank from sitting too long. So I dropped the tank. Installed the airdog with sump. New lines. The motor got 10k miles on it after rebuild. The problem that I have is it starts and idles perfect until it gets to the normal running temp about 190 as soon as it hits that temp all of the sudden it start spitting and puffing and just dies afterwards. I replaced PMD and moved it up front. But it does the same thing. Runs fine and clean while cold and as soon as the temp gets to 190 it’s does it again I do have code PO251 . on it but I can’t figure it out. Is it a high pressure fuel pump? Any suggestions?

[@JessePelkey1]

Most likely the injection pump, this is going to sound strange as hell, but next time you run it up to temp, poor cold water directly onto the injection pump and see if it stops the issue even for a moment.

[@oleg9782]

@@JessePelkey1 thank you for reply. I did order shut off solenoid before I came across ur video and it just came in the mail today to try that first but I will try the cold water option as well to make sure. There was a lot of water in the tank and some rust as well before I got to cleat it all and installed airdog2 but the damage was already done now I got to find the problem since I am doing conversion from van into rv and I need it fixed. I runs clean and idles clean starts right up but as soon as it get warm it dies. When it was cold during the winter I couldn’t even tell that it had that issue I started from time to time to charge the battery’s and let it idle for about 20 min but now when it’s hot outside in 90s it runs for 5-10 min great and then all of the sudden seems like one or more cylinders dies and then whole engine just dies and won’t start until it cools off.

[@donaldwilliams778]

Injection pump keep going out every 2 years. Help!!!

[@JessePelkey1]

By chance where are you buying your pumps?

[@stevepesce3093]

All right back to what I said earlier I just sent a reply about what you were doing I replaced the lift pump I had air in the system truck starts right up in the morning but once it gets hot it's hard to start again. Now if I turn the key on and off a few times or if the engine cool it will start with no problem but with the engine hot it sounds like it's not getting any fuel ??

[@JessePelkey1]

Good possibility unfortunately injection pump, there's a quick little "test" you can see about doing once the engine gets hot, poor cold water directly on the injection pump and see if it fires right up. If it does unfortunately it's the injection pump in the internals are just wore out to where the heat expands the internals of the pump not allowing it to make pressure properly

[@kerrid42]

So i have a question. I have a 1996 Gmc Sierra c3500 hd turbo. I need to remove the fuel "cutoff solenoid to test but, having problems turning it. Any belp would be greatly appreciated. Thanks, Kerri

[@JessePelkey1]

You should just be able to put a socket and ratchet on it and spin it radio. Is it just not wanting to budge or is it something else?

[@michaelpopolillo8103]

My lift pump stops working after 20 seconds when I turn the key on, it’s a new pump

[@JessePelkey1]

It should only run during the glow plug cycle then once the truck is running. 20 seconds is pretty normal

[@tedshapiro2496]

It is too bad GM didn't hire you to design the 6.5 liter diesel engine in the first place, if they had, all of these modifications would not be necessary.

[@MrWannis]

I wish I could talk to you I need help

[@user-ry9lc4og2u]

I need help Jesse cracked heads. Brad is my name 1994 c2500 2 wheel drive and no start after replacing heads

[@blackmanops3749]

Excellent content, but GOD, I'm tearing my hair out with the loud, obnoxious nursery rhyme music!

[@JessePelkey1]

Older video man, the new ones I make don't really have any music