1995 Chevy 3500HD with 7.4 gas. It came here for exhaust work and a few other issues. Idling way high with a check engine light when I pulled it in so I scanned it and had 5 or 6 codes. I got rid of all but 2.
It still has a 32 EGR malfunction and 39 Torque converter clutch stuck off. I changed out egr to no avail. Also the tcc does actually lock up, so I'm not sure why the computer is unhappy. The thing that's weird is they both show up at the same time every time. Is it possible they are related somehow? Maybe share a common ground somewhere? Just for kicks I also changed out the brake light switch as it shuts off tcc when brakes applied. I found a list of codes online showing 39 as brake pedal position switch stuck off and this truck had issues with that switch in the past. Scanner is showing it cycling when brake pedal applied, but still have the codes.
I don't have a service manual as its not my truck and haven't been able to find anything online necessarily linking these 2 codes but my gut tells me its the same issue causing them both. Just wondering if anybody has any ideas?
I cant really spend much more time on it guessing or throwing parts at it, but I really hate seeing that check engine light. I thought maybe somebody here has spent some time working on something similar and have some idea where to look. If not, I guess I'll just have to call it done.
Thanks, Jeff
It still has a 32 EGR malfunction and 39 Torque converter clutch stuck off. I changed out egr to no avail. Also the tcc does actually lock up, so I'm not sure why the computer is unhappy. The thing that's weird is they both show up at the same time every time. Is it possible they are related somehow? Maybe share a common ground somewhere? Just for kicks I also changed out the brake light switch as it shuts off tcc when brakes applied. I found a list of codes online showing 39 as brake pedal position switch stuck off and this truck had issues with that switch in the past. Scanner is showing it cycling when brake pedal applied, but still have the codes.
I don't have a service manual as its not my truck and haven't been able to find anything online necessarily linking these 2 codes but my gut tells me its the same issue causing them both. Just wondering if anybody has any ideas?
I cant really spend much more time on it guessing or throwing parts at it, but I really hate seeing that check engine light. I thought maybe somebody here has spent some time working on something similar and have some idea where to look. If not, I guess I'll just have to call it done.
Thanks, Jeff