More POWER For Any 12 Valve Cummins! (EASY Fix)

If you own a 12 valve cummins (1st gen or 2nd gen) make sure to check for this issue. It is very easy to fix and really wakes the truck up!
Check out my website for merch and informational articles: www.decentgarage.com
Check out my other videos: / decent1stgen
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Contact Info
Email: [e-mail]
Address: PO Box 154, Payson UT, 84651
#1stgencummins #cummins #DecentGarage

[@decentgarage]

Who else was shocked that such a simple fix made such a big difference in Prospector Bob's acceleration? 🙋‍♂️

[@SqueakyTron]

bob needs power driven diese towing compounds and 500 horse fuel kit

[@decentgarage]

Agreed!

[@SqueakyTron]

@@decentgarage i think you should see if theyd sponsor you for that. it'd be sweet for s=them to have a ccsb first gen running their kit aswell as for you

[@tanner882]

Kinda curious how you installed a new turbo with such a sloppy throttle play…..

[@JustDiesels]

I still remember the difference this made on my 93 first gen! It was literally night and day after taking up the throttle cable slack, and swapping the position of the throttle cable link on the pump!

[@decentgarage]

It made a world of difference! #0to60inyour1stgen

[@Ironwind1972]

This was exactly what I needed to see Tim, Thanks for posting it on FB for me buddy.

[@decentgarage]

Glad it was helpful!

[@OldCowboy450]

I guess I'd ask why it was OK new and not now? Cable stretch, spring sprung throttle linkage retune, something change over time?

[@jamesnm21]

I took out the slack, installed a spacer, increased the rpm and, sure enough, she was at full speed in no time. 😂

[@decentgarage]

It's amazing when you do this and feel the difference!

[@CarsCumminsNCams]

Thank you so much, I have been having this issue for as long as I can remember. This is the only helpful video! Thanks

[@decentgarage]

Glad it was helpful

[@OvensGarage]

Great idea, I’ve never even really thought of checking mine out. I’d be curious to see where it sits compared to yours. Maybe I’ll have to video my 0-100km and give you a run for your money!

[@decentgarage]

Yours will kill this time. I'm going to do another one on a flat stretch. This stretch has a grade that kills the 1 to 2 and 2 to 3 shifts

[@georgeenriquez612]

Nice job Tim👍🏻

[@decentgarage]

Thanks 👍

[@austinbutcher5391]

Hey jw what seats 💺

[@decentgarage]

They are 2001 Durango seats

[@AD-ht3jl]

My truck is that slow and some say it's a loose nut behind the steering wheel....

[@decentgarage]

That's a common problem with these trucks 🤣🤣🤣

[@markroybal8958]

Another great and informative video man! Gonna go check my W350's cable right now...THANK YOU!

[@decentgarage]

Thanks! Let me know how yours looks

[@kauairootsohana]

Love the videos brother just got me a 93 club cab

[@decentgarage]

Thank man! Have fun with your new truck!

[@10mm]

Anutha great vidja thanks dude!

[@decentgarage]

Thanks man!

[@motorman9]

Holy balls. Mine does about 7 😬

[@decentgarage]

Yep she's not fast 🤣

[@motorman9]

@@decentgarage 😂 I'm not even sure whats done to mine. 351, exhaust, intake, and wastegate, I think... 4r100

[@decentgarage]

@@motorman9 I've got this one better than it did in this video but it's still not speed queen

[@desme34]

Just need to add the Forest Gump clip of him running beside you.😄

[@fangioargueta7359]

That's 🐌 🦥 still slowwww!!! Joke 🤣🤣🤣 put big boy parts in it

[@decentgarage]

Haha, I know but I have to start somewhere! 🤣

[@darrellyoder2602]

"It's a little dirty in here" looks better than my truck after I cleaned it! Wow, doubled your 0-60 time for free!👍👍

[@zanderglaze8684]

Hey Love the Videos very Helpful do you have any idea what would cause the truck to lose power after it gets hot it's a 91 First Gen

[@decentgarage]

Seems like it would most likely be a fueling or electrical issue. I haven't heard of that happening before though

[@offgridmangogrower]

Rat nest in your intake inlet…! If not it’s a fuel issue….

[@decentgarage]

Ended up being a bad lift pump.

[@DuddiesAdventure]

I had the same exact problem with the Death Charger. 70's, 80's and 90's pedals all have different throws. Originally I had a 70's pedal in the DC and everyone called it Skid Steer mode because it would not get over 2000RPM. If you watch my Moab episode youll notice that the RPM never change haha. I solved the problem by installing a 1991 pedal that I had. But nice mod with spacer on the 80's pedal. easy fix!

[@decentgarage]

I'm actually thinking this is an 84 pedal. It still feels like it should have more throw. Maybe I'll do a video and swap the pedals from the og crew to this one for kicks and giggles

[@DuddiesAdventure]

@@decentgarage Sounds good, When I swapped mine I had a pedal from a 70s, 80s, and 90,s all lined up next to each other and there was a difference

[@decentgarage]

@@DuddiesAdventure thanks for the advice. I wouldn't have thought the pedals would be different

[@DuddiesAdventure]

@@decentgarage No Problem, I just wish I new the exact year they were out of, I think it was 1977 and the one I used was out of 1991. But the 80s one I had I have no idea

[@davesd1505]

Hey love the videos, any ideas on how to fix wind noise coming in from a vent window?

[@decentgarage]

Look up ovens garage on KZbin. Tyler has a great video on there on how to rebuilt the locking mechanism for the wing window 👍

[@davesd1505]

@@decentgarage thanks for the recommendation, I'll have to check that out.

[@Mister_454]

I'm ten so I just say if you have the money rebuild the whole thing

[@elk5445]

My 95 had same problem. I fixed it with some j clips for rabbit cages. Actually got the truck cheap because everyone else that looked at it thought it had a major problem.

[@decentgarage]

Great idea with the j clips!

[@kidcrash82]

Hmmm, I have a 93 with a NV4500. I’ve never timed it bu my I’m sure it’s quicker than that. I’m wondering if you have some bad tuning. Also, unless I’m hauling a load, I don’t use 1st gear, one less shift to get to road speed.

[@jay77081]

air cleaner

[@decentgarage]

Keep watching. That wasn't the issue

[@paulweber6963]

Will you make a video on tuning out the smoke? Mine was turned up by the prior owner, and it smokes quite a bit if I get up to speed quicky.

[@decentgarage]

Yes, I'll do videos of that as i go. I'm not near as comfortable tuning a ppump, which is what is in this truck, but I'll learn as i go.

[@jimkillen1065]

I could not find the video , however i just went through this on my 95 12 valve . 10 plate slide all the way forward. 215 injectors, 3 k governor springs . 18 deg timing. This think would smoke like crazy if i put my foot into it . When it was a automatic it was not really bad because a automatic will down shift and spool up the turbo. That and a lite foot not a problem. However when i went to a g56 things changed. Finally i got tired of the smoke and installed the heavy afc spring and started trying to dial back the smoke . I finally adjust the spring past half way back and still smoke . This is a pain in the butt on cruise control. FINALLY I had enough and set the afc housing all the way back. That fixed the smoke and it stll runs good . Cruise is a lot better also because it want black out 2 lanes of traffic. Drives a lot better , now with the g56 .

[@seanbrossard8178]

Fix starts at 4:30

[@decentgarage]

Yep

[@zachhensel5480]

74 d100 gas trouble starting take a while to start I think its week spark gets fuel and are what u think

[@decentgarage]

Ehhhh... I don't know gas engines like i know diesels

[@ModernMillwright]

Put a new cable/ adjust the cable and the throttle. Throw in a governor spring. My 91 wouldn’t go over 60. I adjusted the throttle linkage. Then did 3600 rpm spring, and moved the ve pump Star one hash mark. Just recently put in a heim joint throttle linkage adjuster.( old one would pop off). Did 60# valve springs for piece of mind, exhaust and intake. Doubt I’ll ever get over 3200rpm. Just the throttle upgrades alone helped a lot. Just need to do some transmission upgrades to the old 727 3speed.

[@AnxiousCowboy]

i have a 93 with 3 speed auto and i feel SOO much better about my truck. I am all self taught and dont have a frame of reference and I love my truck (had it one year now) and it feels the same on the pedals whether or not i'm pullng 4-5 tons. BUT even without a load... a slight uphill from standing makes people behind me impatient LOL. Always wondered if it was an issue I was unaware of since it drives nice though. glad it isnt.

[@offgridmangogrower]

My answer to those tail gaters Give them a light coating of unburnt fuel across their windscreen Guarantee it will break that ugly habit.

[@jimb7922]

Tim do you have a source for the black plastic spacer material us used for the gas peddle ?

[@decentgarage]

I don't have a part number or anything. I went to ace hardware and they had a little thing full of different sized plastic spacers so I just grabbed a few sizes and then use the one that fit the best.

[@jimb7922]

@@decentgarage Hey! I was asking about the inch thick plastic block from your body lift that you put between the fire wall and the gas pedal mounting bracket ?

[@decentgarage]

@@jimb7922 oh gotcha! Sorry about that. Yeah i will try to find the link on Amazon. It was a 2 inch by 36 inch piece and i just cut it in to a bunch of 2x2 pieces but it had been working great.

[@decentgarage]

@@jimb7922 wow, just looked through my order history on Amazon and i can't find it. I'll keep looking.

[@brcron007]

Tim, I really think it's the Christmas lights that's causing the issue ;) PS My original 92 and orig 84 both had a piece of fabric tape on the cable end on the accel pedal. Just thought I'd mention it. It was to help it from popping out of the pedal.

[@decentgarage]

Interesting. Maybe I'll add some on there for good measure 👍

[@jakestutesman5735]

Hey I just bought my first 1st gen. Is there a way to adjust the brake pedal position? It’s about a six inch difference from the accelerator pedal. Thank You

[@decentgarage]

I haven't looked as closely at the brake pedal. Is the brake pedal way higher than the gas pedal?

[@decentgarage]

Just saw your other comment on the overdrive video. I think it's pretty standard on these truck for the brake pedal to sit a ways higher

[@jakestutesman5735]

@@decentgarage I think on most vehicles it is but not to this degree.

[@jakestutesman5735]

@@decentgarage Thank You

[@chinkygardner4155]

Yee

[@samcssolutions]

I like the blouse, are they available to purchase? Do they come with a pocket? There is nothing more convenient than a pocket on your shirt.

[@decentgarage]

Blouses with pockets may be available soon 😅

[@wyattstevenson656]

Digging the shirt! Any way to purchase?

[@decentgarage]

In the works! Hopefully by June 🤞

[@raygross1931]

Low fuel pressure

[@samcssolutions]

How much boost did you get?

[@decentgarage]

It got up to 34

[@KeystoneOutdoorsman]

I was thinking throttle linkage

[@decentgarage]

I'm sure that is still part of the problem haha

[@jason86768]

I've had a few older vehicles that had slop in the gas pedal cables, and they all have really woken up once that slop is taken up. Steel cable can stretch over time.

[@decentgarage]

Yep, gotta keep an eye on that.

[@nathenthompson9373]

Wow I’m surprised it’s that slow with a P-pump. What turbo is on the truck ? I’ve got a Ve pump with a he351 and it’ll get to 100km in 16seconds

[@decentgarage]

Yeah i didn't give it everything on the second run. Just tried to demonstrate that the issue was fixed. But its still not fast haha

[@nathenthompson9373]

It’s a good video for sure, just nice to keep the driving fun factor at a high level.

[@daveunderwood6498]

I see your problem....you're driving a 12 valve wearing crocks. :)

[@decentgarage]

Crocs are proven to give an extra 40 hp 😅

[@daveunderwood6498]

@@decentgarage 🤣🤣

[@bigborjo]

oh that hurts to watch. has to not be getting enough fuel or boost leak. FYI watching all your videos during my 93 restoration.

[@decentgarage]

Hope this video and some of my other videos help you out 👍

[@kijetikimavi]

Messi,, you speak good english

[@jimmungai1938]

This is six in a row jim saying maybe it’s a little bit of everything

[@decentgarage]

This is probably true 😅

[@pabloajungo7630]

Its a Cummins its does everything and then some

[@decentgarage]

Very true!

[@SqueakyTron]

i wouldnt worrey about your trans. a getrag is good for 500 horse

[@decentgarage]

Yeah, I'll put some more miles on it. During that second run i really didn't give it all i could. It's a fun truck to drive now.

[@darrylmonat5361]

Throttle cable stretched out.

[@decentgarage]

You got it!

[@Sunde53]

thats insanely slow lol godamn does it have 4:10s?

[@decentgarage]

3.54 gears. The hill i was doing this test on kills the speed in 2nd and 3rd gear

[@ChristianNeff]

Wow 0-60 in 38 seconds??? I gotta time my VE... I think its like under 10... What is wrong with your truck lol

[@decentgarage]

I still wasn't going full throttle just trying to show that this modification worked. This truck still needs a ton of tuning

[@ChristianNeff]

@@decentgarage will be interesting to see. I originally thought the P pump was the clear choice... but after reading the Facebook page posts... im not so sure. Seems like a tuned VE with injectors and a turbo might be a way better daily driver / tow rig.

[@decentgarage]

@@ChristianNeff honestly I prefer the ve pump in most regards. This ppump truck is going to take me a while to tune cause ppumps are quite foreign to me

[@javierchavez7253]

Minute flat

[@decentgarage]

Pretty much!

[@Kyle-iz5qt]

Wtff my stock truck was faster than that.

[@decentgarage]

Yeah on that last run i wasn't giving it everything. Just wanted to make a point that fixing the throttle cable made a huge improvement. We have a ton of tuning to do on this truck 👍