5.7 TPI running rich at operating temperature
#1
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Car: 1991 Z28
Engine: 5.7 L98
Transmission: Manual
Axle/Gears: 3.23
5.7 TPI running rich at operating temperature
Hey guys I purchased a 91 z28 this week and I am not against searching the forum from top to bottom but a little direction would be extremely helpful. When I hit higher rpms the car bogs and breaks up. The car was originally a 5.7 auto and has been swapped to a T5 of unknown origin. If Amy info is available I would forever be in debt to you guys. Thanks
#2
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Re: 5.7 TPI running rich at operating temperature
Have you checked engine codes?
Is there hissing behind your dash?
Is there hissing behind your dash?
#3
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Car: 1991 Z28
Engine: 5.7 L98
Transmission: Manual
Axle/Gears: 3.23
Re: 5.7 TPI running rich at operating temperature
I can't check engine codes because someone in the past decided to cut out the port. So I really don't have a lot to go off of unfortunately :-(
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Car: 1991 Z28
Engine: 5.7 L98
Transmission: Manual
Axle/Gears: 3.23
Re: 5.7 TPI running rich at operating temperature
Ok, so i dug around underneath the dash and i found the diag. port. I have 3 codes coming up which are 15, 24, 42.
#5
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Re: 5.7 TPI running rich at operating temperature
You should start with the code 15 for your 1227730 ecm sounds like a it might be a bad ecm.
http://chevythunder.com/Flow%20chart%20index.htm
http://chevythunder.com/Flow%20chart%20index.htm
#6
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Car: 1991 Z28
Engine: 5.7 L98
Transmission: Manual
Axle/Gears: 3.23
Re: 5.7 TPI running rich at operating temperature
thanks for the list i appreciate it, the car came with an extra computer so ill give it a shot and report back.
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#10
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Car: 1991 Z28
Engine: 5.7 L98
Transmission: Manual
Axle/Gears: 3.23
Re: 5.7 TPI running rich at operating temperature
The ecu has a fast chip installed. My question is now if the car has a auto transmission chip and the car is a manual what do I need to do? I tried the other computer with that chip in it because thats all I have. And right now for the car to run decently I have the temp sensor under the throttle body unplugged and the ETC cable has been spliced with spade connectors And I leave it unplugged or else the car runs like it has a huge cam and then dies out at idle
#11
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Re: 5.7 TPI running rich at operating temperature
Is the Ed wright fast chip on a adapter board ? Here is the specifications on the cts. A new cts is verry cheap. I would work on getting the code 15 taken care of and then if the car bucks any while slowing down or keeps running rich have the memcal reprogramed. You can send me a pm if you like to on programing.
#12
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Car: 1991 Z28
Engine: 5.7 L98
Transmission: Manual
Axle/Gears: 3.23
Re: 5.7 TPI running rich at operating temperature
yes the chip is on an adapter board. i tried my other ecm that came with the car with the same results. And by cts do you mean coolant temp sensor?
#14
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Car: 1991 Z28
Engine: 5.7 L98
Transmission: Manual
Axle/Gears: 3.23
Re: 5.7 TPI running rich at operating temperature
i will pick one up tomorrow! Thanks for helping a guy out, i really appreciate everything.
#15
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Car: 1991 Z28
Engine: 5.7 L98
Transmission: Manual
Axle/Gears: 3.23
Re: 5.7 TPI running rich at operating temperature
ok so i replaced the cts and the car seems to be doing better, but i went to check my engine codes and still have the same 3. ive searched on the forum and cant find a method to reset the codes to see if in fact i have fixed the DTC 15.
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