89 IROC Runs good when cold then enriches and dies
12-19-2016, 05:53 PM
#1
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Car: 1987 Trans AM WS6
Engine: 305 TPI
Transmission: TH700R4 Stock
Axle/Gears: 3.08 LSD
89 IROC Runs good when cold then enriches and dies
Hello guys
my friend's 89 iroc runs good when hot but when it warms it runs way way rich and then dies.
We tried testing many sensors and we discovered that unplugging the MAF nothing changes so I've thought maf is gone.
It reads 2 volts at 2500 rpm and 1.10v in idle
What do you think?
my friend's 89 iroc runs good when hot but when it warms it runs way way rich and then dies.
We tried testing many sensors and we discovered that unplugging the MAF nothing changes so I've thought maf is gone.
It reads 2 volts at 2500 rpm and 1.10v in idle
What do you think?
12-19-2016, 09:30 PM
#2
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Re: 89 IROC Runs good when cold then enriches and dies
Is the vacuum line connected to the cannonball reservoir?
12-20-2016, 04:33 AM
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Car: 1987 Trans AM WS6
Engine: 305 TPI
Transmission: TH700R4 Stock
Axle/Gears: 3.08 LSD
Re: 89 IROC Runs good when cold then enriches and dies
vacumms are ok
The car backfires bad (in the intake too) when I stomp on the gas.
CTS reads good
MAF reads good
Distributor is new
Injectors read good ohms
Maybe ECM or o2 sensor? Maybe knock sensor?
The car backfires bad (in the intake too) when I stomp on the gas.
CTS reads good
MAF reads good
Distributor is new
Injectors read good ohms
Maybe ECM or o2 sensor? Maybe knock sensor?
Last edited by F-body driver; 12-20-2016 at 05:09 AM.
01-24-2017, 11:49 AM
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Car: 1987 Trans AM WS6
Engine: 305 TPI
Transmission: TH700R4 Stock
Axle/Gears: 3.08 LSD
Re: 89 IROC Runs good when cold then enriches and dies
The car is not mine and all the vacuums were ok. We swapped a carb in it and now goes like hell. I guess the ecm was bad. Thank you guys
01-24-2017, 06:55 PM
#6
Re: 89 IROC Runs good when cold then enriches and dies
had a similar issue to this....it was all fuel related. my issue was the stock fuel pump was bad. then when i replaced it and it ran great. check your fuel pressure and do a pressure drop down test. i think if you google "tpi fuel drop down" you can find it in images.
02-28-2017, 05:22 AM
#7
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Car: 1987 Trans AM WS6
Engine: 305 TPI
Transmission: TH700R4 Stock
Axle/Gears: 3.08 LSD
Re: 89 IROC Runs good when cold then enriches and dies
We tried an other fuel pump but got the same issue
I've bought his TPI setup for 200 bux for a spare
Something was wrong for sure but all the sensors and injectors were OK
I've bought his TPI setup for 200 bux for a spare
Something was wrong for sure but all the sensors and injectors were OK
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11-26-2017, 11:07 AM
#8
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Car: 1987 Trans AM WS6
Engine: 305 TPI
Transmission: TH700R4 Stock
Axle/Gears: 3.08 LSD
Re: 89 IROC Runs good when cold then enriches and dies
Problem solved: it was the ECM but the owner converted the car to carb