How do I fix this
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Joined: Oct 2001
Posts: 319
Likes: 6
From: Baltimore Maryland U.S.A
Car: 92Z28,98LegacyGT,ZX9R,91 Z28,02 Z71
Engine: 350,307,2.5,900cc,5.0
Transmission: 700r4,4spd auto,700r4,4L80
Axle/Gears: 323,?,323,?,373
How do I fix this
I have a 92 Z28 350tpi it runs rich.I didn't get any
trouble codes.What would cause this?
trouble codes.What would cause this?
Thread Starter
Member
Joined: Oct 2001
Posts: 319
Likes: 6
From: Baltimore Maryland U.S.A
Car: 92Z28,98LegacyGT,ZX9R,91 Z28,02 Z71
Engine: 350,307,2.5,900cc,5.0
Transmission: 700r4,4spd auto,700r4,4L80
Axle/Gears: 323,?,323,?,373
You can smell it,and it failed the tail pipe test.
Thread Starter
Member
Joined: Oct 2001
Posts: 319
Likes: 6
From: Baltimore Maryland U.S.A
Car: 92Z28,98LegacyGT,ZX9R,91 Z28,02 Z71
Engine: 350,307,2.5,900cc,5.0
Transmission: 700r4,4spd auto,700r4,4L80
Axle/Gears: 323,?,323,?,373
It's all stock right now,just a trans rebuild.
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
does it have alot of miles on it?
have you checked you charcoal canister connections?the filter could also be clogged in the canister?
have you checked you charcoal canister connections?the filter could also be clogged in the canister?
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Supreme Member
Joined: May 2000
Posts: 2,963
Likes: 3
Car: 1982 Z28
Engine: LS1
Transmission: T56
Did you get it to flash code 12? If not, do that first...verify the ECM is happy.
If you get 12, the ECM is getting a bad input from one or more sensor(s) and it doesn't know the data is bad.
You have a couple of options, you can try to track down a scantool and see what the ECM is doing. Look for it to go into Closed Loop mode. Look at the sensor inputs, particularly the Coolant Temp. You'll probably find it's staying in Open Loop mode, and you'll see why.
Or you can throw sensors at it, starting with Coolant Temp Sensor and moving on to Oxygen Sensor, etc....you'll hit it eventually.
-Kevin
If you get 12, the ECM is getting a bad input from one or more sensor(s) and it doesn't know the data is bad.
You have a couple of options, you can try to track down a scantool and see what the ECM is doing. Look for it to go into Closed Loop mode. Look at the sensor inputs, particularly the Coolant Temp. You'll probably find it's staying in Open Loop mode, and you'll see why.
Or you can throw sensors at it, starting with Coolant Temp Sensor and moving on to Oxygen Sensor, etc....you'll hit it eventually.
-Kevin
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