Troubles with a '96
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Cargo Master
Joined: Jun 2010
Posts: 2,771
Likes: 3
From: Louisiana
Troubles with a '96
Hey guys normally I'm on the sd page but I have a friend with a'96 auto that he converted to a manual. The motor was rebuilt about 4 years ago and is stock with stage 1 injectors and a burnt PCM. The PCM is burnt for the truck stock not with the stage 1s but it was burnt for the manual. The problem is at around 2000 rpm's it feels like the truck cuts out. 2-3 times then finishes reving out. This is the main problem. The other problem I notice but the owner doesn't is it sounds like it's missing as it is reving out. Like it's running on 7 cyl. It runs pretty good other than those two problems. One other thing is it smokes like a freight train but I figured it was because of tuning! Any advice would be a good start to figuring this out! Thanks guys!
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
It says the pcm was re burned for the manual trans but not reburned for the manual trans with stage ones. RR even with it reburned for the manual it still didn't work for you? I agree with darin on the wire harness or injector issue. Pull the valve covers but he will need the correct tuning
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Cargo Master
Joined: Jun 2010
Posts: 2,771
Likes: 3
From: Louisiana
I had a feeling it was
Wiring causing the miss but the only time he gets a cel is when he coast to a stop sign. I couldn't check the code though cause my box wasn't getting power. I found fuse 16 burnt then I checked the codes and there were 6 so without thinking I just cleared
Them and figured we'd focus on the ones that came
Up when we drive it again but by this time last night the owner was pretty lit so I'll probly go over today and we'll run it and check um again!
Wiring causing the miss but the only time he gets a cel is when he coast to a stop sign. I couldn't check the code though cause my box wasn't getting power. I found fuse 16 burnt then I checked the codes and there were 6 so without thinking I just cleared
Them and figured we'd focus on the ones that came
Up when we drive it again but by this time last night the owner was pretty lit so I'll probly go over today and we'll run it and check um again!
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Cargo Master
Joined: Jun 2010
Posts: 2,771
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From: Louisiana
Does this make a mess or not to bad? Also will the oil be obvious and what if one is different from the rest?
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Thread Starter
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Cargo Master
Joined: Jun 2010
Posts: 2,771
Likes: 3
From: Louisiana
Okay guys we did some runs with the truck today and the only 2 codes that keep coming up is a P0237 but the cel does'nt come one with this one but the P0236 turns the cel everytime we come to a stop letting the truck coast for a while. The cel only stays on for a little while and goes off. Other than that there were no codes! Would the wiring affect the cutting out? The reason I ask is cause it happens everytime at the same rpm's, but not everytime he runs through the gears.
Posting Guru
Joined: Nov 2007
Posts: 2,158
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From: West Texas
I could have sworn he said he was running an automatic pcm when I first read that. I do know for a fact that the wrong one will make it cut out like crazy. Also the cruise will not work right and the idle will be all wrong. I still have my 94 pcm in mine and haven't gotten the other one flashed yet. We're going to NC real soon adn I want to go to DP tuner in person if my wife gives me an allowance that month. I have to be nice to her.
Oh well. Wiring could do it too. As for the oil spouts I am not so sure about that. Sometimes when you first start one they will not be spouting oil but warmed up at operating temp they should. Even then they don't sometimes and still are working fine. I don't put much faith in diagnosing injectors that way.
Oh well. Wiring could do it too. As for the oil spouts I am not so sure about that. Sometimes when you first start one they will not be spouting oil but warmed up at operating temp they should. Even then they don't sometimes and still are working fine. I don't put much faith in diagnosing injectors that way.
Posting Guru
Joined: Jan 2006
Posts: 1,605
Likes: 1
From: Elkhorn, WI
Well both those codes are turbo/map sensor related. Does he have a boost fooler on the map line? Maybe the pcm is defueling from too much boost? Makes sense because it goes away in a little while.