GM 4.3L V6 / 5.7L V8 - Fuel Spider Swap, SCPI to MPFI

[@bglowark12]

i have a 2004 4.3 silverado. it was me and my uncles goal to fix it and for it to be his last project since he had stage 4 cancer. he came over and helped me every single day of the summer till we had my truck almost complete. we did everything imaginable even swapped the motor to a 26k one i found. he passed now but i still have my truck and when i work on it i think of him RIP Uncle Lee

[@mariocardenas239]

bglowark12 Im so sorry to hear that.

[@parentsbasement7734]

glad you are able to jump in truck and remember the time you and your uncle spent under the hood my favorite uncle passed from leukemia it was the worst type of leukemia not that any is good but we were remodeling his and my aunts kitchen when he found out i finished the kitxhen abd before he passed he came home and was able to see our work done and he told me how proud and thankful he was that i helped him and i think of him every time i walk in there its just tile and wood but his memory is there

[@edcrabb]

I wish more young men would overcome the stigma, anger, or just plain old thick headed attitude they all have in their early 20's. You did a phenomenal thing for a loving dyeing man son, you showed him love, and respect, and you now have happy memories of him for the rest of your life. I went through this with my father, he was very sick but no one would tell us what it was that was ailing him, until one Dr. slipped and told my mom he had cancer of the larynx. That was just the beginning of 12 years of different cancers, some bad ,bad times. He ended up having the cancer on his larynx treated with radiation and chemo. He had three different melanomas, one on each ear lobe, and one on the back of his hand, but the lung cancer was what ended him, it was a race between the lung cancer stage 4 and the recto Colo cancer. We finally had to have him hospitalized two days before he turned 62, his pain meds were so strong he constantly would hallucinate, and lost most of his strength. He could not sit on a toilet, or get up off one. So my mother and I had him admitted to the near by Sunnyside Keizer hospital. That night I punched an intern in the nose and broke his nose. He let my Dad sit on a bare gurney, no sheets, blankets ad a single hospital gown with no tie straps. I asked this excuse for a nurses aid parading as a Dr. if they could cover my father up and get a gown that at least tied and covered the basics. And could he tell us what was wrong with my father, her turned on one foot, looked at my worn out tired Mom, my two sisters and I and blurted out "He's dying of lung cancer and I am not in charge of laundry ask a nurse." I grabbed him by the throat slammed his head into the wall, punched him five times until my older sister pulled me off of him. And I then told him what I thought of him. Security showed up and wanted to call the County Mounties on me. I was so pissed I knocked one of them on his ass. My mom made me go out side and walk it off. When I came back my poor dad was still sitting there no blankets and freezing cold air coming in the ambulance doors he was sitting by. My younger sister went on a laundry hunt, found the blankets and a gown that had ties. We managed to keep me out of jail, and get my dad a room. Two days later at 5:17 AM PST he died in my arms. I told him that soon angels would come for him and it was okay to go home with them. He opened his eyes one last time and whispered I love you son, take care of your mom for me, and then took a long last breath and was gone. For all of you who have had a similar experience, thank you for helping you dad, uncle, neighbor who ever it was, you did the bravest thing you will ever do in your life, you helped a very sick older gentleman make his way from life to death with dignity.

[@harujp2]

when you quantified the time of the job by beers needed i knew i had to watch it through what a great video for people who might be scared

[@CarlRMauri]

not JUST good: EXCELLENT VIDEO, THOROUGH, NO NONSENSE, BEST THING: ERIC LAYS OUT THE TOOLS NEEDED AND SAVES TIME BY TELLING US ABOUT THE CROWS FOOT MY NEW BEST FRIEND THANK YOU !!!

[@olliec.4424]

Very helpful. Thank you. I have to change the spider in my 4.3L Safari van. I appreciate how thorough and careful you were about it. TLC, as they say.

[@WinnfieldCustoms]

I wish there wasn't such a thing as cancer! Take care of that truck man

[@blargblarghonk]

And this is why I love my TBI. A simple rebuild and adjustable fuel pressure regulator and runs like new. But I do hate that it's not port fuel injection but tbi is about as reliable as you can get.

[@yambo59]

Yep - I had throttle body injection on my '89 Caprice and it worked flawlessly also super easy to replace the two injectors or any of the sensors on the outside - everything could be replaced without even removing the throttle body

[@ShanerTheGrey]

This is probably visually clearest video I've seen on this topic. And yes sir your video did help.

[@gunfighter494]

You do not have to break the fuel lines loose at fittings just remove the bracket bolt under the lines at the back of manifold pop lines from spider assembly, and lift them up and secure them with a wire tie. I do it this way, saves time and effort and reduces the chance of another fuel leak .

[@stevemadak6255]

@5:30 you do not have to take those back ones apart. Remove the bracket that holds it to the manifold and just remove the fuel lines from where they tie into the top. At this point you can gently lift it out of the way and out it back when done.

[@WinnfieldCustoms]

Thanks man! 165k miles of carbon build up, was very nasty. I spent about an hour cleaning the top of that damn manifold. I just replaced the plugs and wires and put new front shocks in the truck is running great now.

[@tacosandbeer]

That truck is going to run forever

[@waynearch9669]

that's exactly how mine looked...grear job thanks..wow i just noticed you flimed this 10 YEARS ago.. U.S MARINE VETREAN

[@petehuck08]

Also, more 4.3 specific videos for performance or whatever are appreciated!

[@ucallthatatweet]

In the throttle body video, you mentioned hearing what sounded like a valvetrain tick. Did this repair cause that sound to stop? Thanks

[@WinnfieldCustoms]

yes running strong 175k+ miles now. going to have an update soon, found some free time. thanks man

[@leviscott8519]

This video is a diamond in the ruff. Smell pro lol. Great video!

[@howardcameron1541]

Thank You, perfect timing getting ready to do this to ole red 97 S dime

[@MrJamestheredneck]

the 95 are easy, ive done mine, took me about 2 hours. i have yet to do this on my 97 s10. so it is worth the tips and whatnot, so thank you eric.

[@SonOfNone]

I have a '98 Yukon 350 that I'm looking to do this to. Great video- I've seen a few others that made it look harder to do. Now I just gotta save up $400-500 for the parts [plan to keep it all ACDelco]. Subbed so I can come back when I'm ready to do the job. I'll say it again- Great video.

[@baloo1061]

Fuel savings is significant. one quarter of the total tank. thanks again

[@johnjones8021]

I just changed one injector ,miss on #5 with good compress...runs like a champ now

[@stevengillespie27]

Awesome straight forward video I will be tackling mines soon as the part arrives an just save $250 an do it myself. Thanks

[@MrFrankflores81]

thanks for the video! it helped me on my 2001 gmc sierra 4.3 as well!

[@addicted2stangs]

so i was wondering can you upgrade the injectors on the new spider set up later on down the road just by swapping them with similar larger ones or do they even make larger injectors for this set up say 42lb ones im thinking about goin turbo in the future with my 4.3 and if it can be done i would like to avoid the marine setup

[@jamieround2072]

did u say u got the new spider injectors & all the other stuff from napa........?? if so how much was every thing.......????

[@Leatherkid01]

a little tip.... when working with fuel or flammable liquids .... use a fluorescent or led work light ..... worth the money spent on 1 ....

[@kevinhornbuckle]

+Leatherkid01 Several years ago I watched an entire dealership burn to the ground. New cars up in smoke. The fire started with the break of an incandescent light bulb in the shop.

[@Leatherkid01]

+Kevin Hornbuckle damn

[@jamieround2072]

@@kevinhornbuckle yikes...dang...... i bet none of that was on u-tube.......????

[@larrygolden167]

Yes I know a guy who knocked one off the frame of a vehicle after he spilled gas on the floor of the shop. It caused an explosion and killed him.

[@propellerhead9197]

I can't get those new injectors to full seat down in the manifold, they just won't push all the way in like yours are. I even mic. the injector and the hole. The injector is slightly larger than the hole in the manifold. Afraid I will break them if I push too hard. Did anyone else have this problem. HELP..?

[@WinnfieldCustoms]

thanks man I hope people watch it!

[@WinnfieldCustoms]

yes sir it was dripping fuel out the back of the regulator when the system was not pressurized. good info, CPI's should be around 60psi. hopefully will never need another regulator. thanks man

[@rickeymitchell8620]

thanks for the video Eric. very nice job.

[@Michiganborn1969]

Wish I had seen this video 2 years ago when I had to replace the intake manifold gasket on my '00 Jimmy 4.3L. Would have saved me hours of headach trying to get that firing posion within 5 degrees if TDC1. Seeing that cap/rotor pulled broght back memories lol.

[@MassEffectFTW]

Why exactly did chevy make those fuel poppet valves out of plastic? I mean, isn't a fuel system a really high pressure, high heat system that needs to last as long as possible? Seems kinda odd to me. I like GM, but why did they think that was a good idea when Ford was using Electronic Multi-Port Systems? I guess I'll never know. Thanks for sharing this, by the way. In what year did they switch to that newer set up?

[@dinocencio53]

Good job fellow Techs. ...

[@Flash445]

Great video Eric! I was wondering... did your engine eat up spark plugs in the months prior to it getting to the condition it was in before you changed the spider?

[@jamieround2072]

i was wondering this as well............ he didn't show or talk of the plugs before or after the job here............

[@edrosa5079]

i have to ask were you getting a misfire at the #1 plug i am took it to shop they want 1200 to fix it i am going to order parts and try and get it done by this weekend also have to ask i think it is my valves are bad ask for a leak down test they took it all apart ,how hard is it to get head off to get valves redone

[@Slum1776]

I just did this in my 96 blazer today. Mine was running really bad. Found out my fuel regulator and the spider was bad(crack in the #2 cylinder fuel poppet) so replaced it with the multiport and she's running strong. Next weekend is the TB mod.

[@DonaldChesley]

Does it matter if the #3 line goes under or over the #1 line?just want to make sure because i seen a video where it went under,i know the #3 elbow needs to be behind #1 just not sure about the under or over.

[@jamieround2072]

i was wondering this too here........

[@northeast13eric]

thanks, getting ready to swap to mpi system on my 98 k1500. just getting a basic idea of what to do...

[@richardh7986]

Eric, Thank you! I havnt found an instructional video yet up to par with yours! I'm 99% sure i'm haveing the same problem in my 2003 4.3L Silverado. Now my question to you is, will that fuel injection spider work on my truck? Because the only ones i can find are for 99-02. Also, how well did the K&N do on performance???

[@flyboy3633]

Great vid. So many KZbins vids are trash, but yours rocks. I don't need to do this project, but i thought I'd give you the kudos anyway !

[@eddieallen8982]

does this swap help over stock injectors? I plan to install new intake gaskets before mine go bad and cause trouble and if these injectors will run better then I want to upgrade.

[@cartoonist1975]

Thanks For shutting the motor off then restarting it. I was curious of how it starts with the switch

[@WinnfieldCustoms]

im sittin here watchin it in all it's glory right now. not sure if its a problem on your end of youtube but it should still be viewable. youtube did make a bunch of my videos disappear awhile back. hopefully you can try again later

[@jamieround2072]

for a v6 / 2wd rig w/ roughly 160 k miles on it why or what is that sand like stuff under the intake ( that was the in-take right )....?? is it sand & bad carbon or what...... by the sound when u hit it on some thing on the top of the motor sounded plastic like..........??????????????

[@kekfreedomheritage5633]

Interesting diagnosis and fix and precaution. Thanks for sharing --- For a 2000 GMC V6, 4.3 L, does anyone know the typical reliable life of the fuel pressure regulator ? And does anyone know the typical reliable life of the fuel injector / poppits ? Would it be wise to replace the fuel pressure regulator and/or the fuel injector / poppits after 200k miles ?

[@connallykendrick9350]

Great video man, thank you

[@Danny25r]

hey eric, thanks for this video man, i did a horrible job prior to watching this and have had really bad fuel issues on my 00 yukon denali, and now i think i know why. I have a question can not cleaning round the surface create a rich run?

[@WinnfieldCustoms]

this is actually back in august, was inspection month so i was running my legal exhaust. flow master outlaw piped out the side, welded to its own flange so i can just swap them. I have the dual straight pipes on there still and don't plan on changing it for awhile.

[@DASPHILADELPHIA]

what would it cost to have this done or could a backyard mechanic like myself tackle this project? Thanks in advance.

[@bobsbarnworkshop]

I got the new AC Delco 'spider' on Amazon for $214, the Felpro gasket set (get the metal ones) was $52...It was for 2001 Astro van so it was extra hard to get under the dash!

[@mickeyflowers]

Did the performance improve with the new injectors? Obviously, comparing to before your poppet injectors went bad.

[@Steve-cs3tt]

Great video, even though it’s awhile back I had a question for you. I’ve been dealing with older model chevy trucks, there is one thing the same at the fuel pipe connection to the spider itself. The fuel pipe retainer is all the same for so many years and on a lot of GM engines. During watching I noticed the retainer is shown to be installed with the flat side up and the side that has the extension that go around the fuel pipe is facing down. (Hope you understand what I mean) the reason I’m asking is because I have seen them in either direction. I’ve never been able to find a cut sheet or a book that shows the correct way (If there is a correct way). Any ideas? Thanks Steve

[@WinnfieldCustoms]

yes that piece should fit tight around the fuel lines to clamp it in place. The lines seal inside the spider unit so I guess it really wouldn't matter as long as there is some type of force holding them down.

[@bigjonsey35]

Very helpful video..I'm doing my 97 tahoe this way

[@dennisyoung3963]

Nice video with good detail. Thanks.

[@BENJI_BUILT]

Just wondering Eric, did you have to drain your coolant before you did this? Hows acceleration, mpgs now?

[@chrisbme1978]

thanks for the video bro how long did the job take may be needing to do the same on my jimmy soon got a bouncing idle and shity gas mileage probably 8-10 mpg

[@UnrepentantBeep]

great calm job dude no hardass hype!

[@dastgahjoosh]

What are the benefits to this? I have a 2001 blazer and I am not sure if it was changed previously by previous owners but I don't have any problems with the fuel injection system. Just wondering if people do this upgrade to actually improve fuel consumption or just a general upgrade from the original when theres a problem with the old one

[@cartoonist1975]

The long tube allows the end of the injector to be recessed away from heat and vapors that cause carbon build up on the end of the injector.By performing this upgrade you will notice a smoother idle, better throttle response and all-around better performance.

[@scrimmy6969]

Just did the vortec marine intake on my sons truck. Came out very nice. I will be uploading a video soon if anyone is interested in checking it out.

[@sschevmale24]

What are the advantages of doing this ????? I'm interested in the video

[@spc.callahan1462]

look at all that room...try doing that on an Astro or Safari. Great procesure!

[@parentsbasement7734]

Spc. Callahan i have helped my buddy twice replace the spiders in his saffari vans and its a bitch not the worse thing but its up there in the pain in ass meter

[@jomenruiz4735]

I have a safari it took me a couple of hours done the spark plugs I can imagine trying to get the spider out

[@petehuck08]

Great video. I have a 2000 silverado 4.3 2wd. It has about 190,000 miles on it, I think its time I stop pushing my luck with the central port injection... did you notice any difference in performance with the updated injector style? Do they make these with high performance injectors? I also plan on doing tb mod. P.s. about 3 months ago I replaced my lower intake seals because of external coolant leaking and coolant in the oil... I recommend replacing before you end up with coolant in your oil!!

[@artm5583]

does the 2003 and up have the updated version ?? because I this part says 99-2002. My fuel pressure regulator has gone out twice now on my 2003 gmc

[@stevegilmore6250]

I have a '99 blazer, 130 K, no prob starting, just when I go to town (14 miles) go to store, come out, starts fine but sputters for a second, then fine again ???

[@justpassingthrough3166]

Obviously the same for a 97 vortec 350? The 4.3 is the same motor with just two cylinders lopped off, correct?

[@WinnfieldCustoms]

yep its the same job,, ac lines and compressor is different, so a couple more things in the way on the v6

[@halcobb1627]

be careful with the wiring on the new MPFI spider. Sharp edges on the clip inside the intake manifold that holds the central unit can cut the wires. After mine failed (blown ECM1 fuse) I pulled the connector on the intake manifold. Checked impedance on all the pins on the manifold/spider (not the harness...the pins on the manifold). They should all be 0 ohms. If any of them indicate impedance you have a short between the FI wire and the metal clip. Injector poppets run at low voltage, so using a test light might be an issue. That metal clip has sharp edges. I removed mine and filed edges smooth (the vertical edges are the issue). The MPFI spider comes with insulator tubes installed on the wires/hoses. Mine were slid down toward the injectors.....not where they are needed. Slide these up toward the central unit/clip to protect your wires. Try to arrange the tubes/wires so they aren't binding on edge of the clip. I have not seen this failure discussed anywhere before.

[@steveandrews1982]

I installed new spider injectors on mine and then I started having starting problems. Removed upper plenum seen new regulator was dumping fuel onto intake.

[@WinnfieldCustoms]

Delphi is the best and they are sold on ebay for cheaper than the parts stores. I used napas brand echlin because I did not have time to order online.

[@fortrax300]

I have a question where ur fuel lines go into your intake manifold is that supposed to move? Ill post a video later for reference

[@kennybasso9223]

very well done vids , i have 1998 4.3L vortex and it has been refurbished once. but i want to redo my fuel system as i know it has the original fuel spiders in it and it gets very bad fuel milage along with it being a 4x4. i am sure the fuel system has over 200k miles on it and tune ups help it some, but still poor performance . how much you charge ? will drive there to have you work on it..but with Delphi parts. and a K&M air system and a good coil ignition system.

[@slowride55]

Finally a new truck video! Looks like you've changed the exhaust again, you should do an update video.

[@WinnfieldCustoms]

ya sounds like it needs it. took about 4 hours, i took my time cleaning everything though.

[@robertk1129]

Good work on upgrading but I would have just got an LS block and built it but that's just me... anyway you have a lifter ticking my guess is the tune needs to be adjusted for the MPFI you can swap it in place of the SCPI but your gonna need a new tune if the NAPA head says no then he's wrong. I didn't hear lifter problem at start of the video...

[@nathanfindley399]

Getting ready to do the same on my Oldsmobile bravada she's got a lumpy idle

[@lawrencerasmus]

did you get a can,m sensor error? I did and it runs perfect mow

[@yambo59]

When will DIY people learn that heavy obnoxious music is the last thing someone wants when trying to concentrate on the details of a complicated repair tutorial.

[@zx8401ztv]

Nice job mate :-) That sandy crud is a worry, is it bypassing the air filter? I bet it ran better lol, im supprised ran or started!! Smashing tutorial :-)

[@baloo1061]

hi. congratulations by your video. i have a onme question my friend. which spider`brand do you recommend, among ACDELCO and Delphi? my truck is a tahoe 97 vortec 5.7 lts

[@lawrencerasmus]

I got a cam sensor error and it won't go away. It runs fine and I have refined the distributer 2x and I know its right so now have to have it scanned

[@davidramirez370]

so i did this upgrade. truck runs but when i go to step on the pedal. the motor chokes out and wants to die? can't figure out why… any help anyone to troubleshoot ???????

[@m-eazye930]

David ramirez you ever figure it out

[@hajrudinkavazovic2231]

Looks he won't mechanic 🥴

[@SwT31]

Finally a new vid man! Lol. Is she running good now? My truck has about same amount if miles on it now. Racking them up!

[@nhsledfreak]

I have a 2000 s-10 4.3 with SFI I'd like to do this conversion what year would I look for to do this upgrade? Thanks for any info you could give me :)

[@markcummins2597]

I had my 99 S-10 4.3 did maybe 3 years ago.When I checked all the stores for the price of the injectors they all said you have to order the bracket separately(just over 30 bucks I think was the cost)-apparently you can't reuse the old one.When I opened the box from Advanced guess what else was in the box!!! got my money back on the other bracket-paid Pep Boys 328.00 to change to the multi port setup-no problems since then.I would have tried to do it myself but the last time I fooled with the motor trying to install a throttle body spacer it idled pretty rough so I had to take it off & let someone else do it for 75 bucks.

[@purpledoge4466]

My 4.3 vortec i believe it needs new injectors or the lines have a crack,or the fuel regulator is bad,engine shakes at iddle and gets horrible gas mileage.

[@alexflores5363]

hi can you send a picture of how to change a fuel injector on drivers side of a 2004 silverado 4.8 v8

[@WinnfieldCustoms]

190k is pushing it is gettin there for sure but if it aint broke dont fix it. Not much difference in performance. the main thing you'll notice is that it will be running right haha. those crazy s10 guys might have a high output spider, I'm not sure if it exists though. you can go wit a new manifold and carb for just about the same price, which i believe would give more power if you run a programmer. I've done my lower manifold gaskets already about 10k miles ago. very common problem

[@Leatherkid01]

great vid... keep it up

[@segrimsjinn]

what year did they switch to the mpi setup?

[@jamieround2072]

i was wondering this too my-self...........

[@anthonymr921]

@@jamieround2072 if I remember it's 2002

[@aaronfrausto3457]

yeah cant wait to do the same on a 2001 gmc jimmy slt wish me luck

[@baloo1061]

thank you. very much... my friend

[@xKUTTxTHROATx]

Hey man I have a question about the spider unit

[@WinnfieldCustoms]

I'm really not sure, but definitely interested. it might just require programming. you should ask one of those crazy s10 guys

[@WinnfieldCustoms]

I got more gas mileage, 17-18 MPG, and the rough Idle and start-up issue was fixed when I changed the spider. It seems to have more power. changing the spark plugs and wires helped the MPG too.

[@bglowark12]

can we get a full walk around of the truck. does it look like the background on your home page?

[@davechampagne9697]

Hey people guess what, Derek from vise-grip garage just challenge you to a burnout contest. Get you some of that

[@eddiecortez8320]

Did u have misfires? Codes?

[@chrisbme1978]

The video is gone what happen did you take it down or KZbin I was waiting for you to do this one too

[@WinnfieldCustoms]

really busy with college and whenever I get around to editing a video I'll think its awesome when i edit it, watch it the next day and figure out it sucks lol

[@done1012]

Good job. Thanks

[@williamgronbach4538]

Why are you sitting on the engine?

[@androidx6387]

did it make a difference in mpgs

[@lenincarrillo1118]

good video, thanks.

[@billreyna1355]

I hadn't work inside the hood since the 60s models.