Tpi tunning issue
#1
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Join Date: Sep 2011
Location: Lawrence, Kansas
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Car: 89 GTA Trans Am
Engine: L98/383 stroker
Transmission: 700R4
Axle/Gears: 323
Tpi tunning issue
Hey guys, have a few questions. I am working on a truck for a friend of mine, the truck has a TPI motor in it with a painless harness. I am assuming its a 90-92 tpi setup, no MAS, has MAP sensor. It stumbles hard after idle and runs rich, bellows black smoke. It throws a code 36, and 44. I have replaced damn near every sensor i could think off and just put a new MAP senson on it. After that it ran good for 10 minutes, took it for a drive and almost couldn't get it back in the driveway it runs so bad, cannot keep it running unless you throttle it hard. Any sugggestions?
#2
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Re: Tpi tunning issue
Strat by troubleshooting not replacing parts. We have no idea what's been done to this motor if anything but it helps to use a guideline. Hopefully the harness is pinned correctly.http://www.chevythunder.com/est_code_42.htm
http://chevythunder.com/o2_sensor_code_44.htm
http://chevythunder.com/o2_sensor_code_44.htm
#3
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Join Date: Sep 2011
Location: Lawrence, Kansas
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Car: 89 GTA Trans Am
Engine: L98/383 stroker
Transmission: 700R4
Axle/Gears: 323
Re: Tpi tunning issue
I have been troubleshooting. But when all else fails, remove and replace. I would hope the harness is correct, coming from Painless but a possibility it could be miss pinned. I will check that. I did find a dead spot on the TPS sensor today, when i bought the new one from Napa, it came adjustable, slotted screw holes. How do you set that? Never seen that before.
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