service engine soon light
06-13-2001, 02:01 PM
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Location: Kirkwood, MO, USA
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Car: 1984 Z28
Engine: 454
Transmission: Th400
Axle/Gears: 3.73
service engine soon light
Anyone have this before? Light comes on after cruising on highway about 15 minutes start driving around town and it goes out. Shut the car off and restart no light until on highway 10 to 15 mins.?
06-13-2001, 02:16 PM
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Car: 04 GTO
Engine: LS1
Transmission: M12 T56
From your other post i know you have a 90 L98 car (important to let us know these things.) Looking into my crystal ball, i can see that your problem is....a code 32. There's an outside chance it could be a lean/rich O2 as well.
What you need to do is read the tech article on scanning codes by putting a paperclip in the ALDL. Verify the 32.
After that, you get to figure out what is wrong. Does this happen everytime you're on the highway cruising steady state? If so, you may have an actual EGR problem like a stuck/defective EGR valve, broken EGR solenoid, clogged vac lines/ports. If it's intermittent (and it still helps to check the above things) then welcome to the SD club. Mine was the same way, but everything in the system looks fine. My solution was to disable code 32 in my PROM so i don't have to get annoyed by it anymore. The problem is that the way the computer checks for an EGR fault is a hard test to pass, and even a functional system can fail it sometimes. Rather than beat myself up over it, i disabled it.
------------------
Ed Maher - Moderator @ The Carb Board
92 Z28 Convertible - Quasar blue / Tan top
LB9 4L60 GU2 G80 - stock, soon to be sleeper
-=ICON Motorsports=-
- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die
What you need to do is read the tech article on scanning codes by putting a paperclip in the ALDL. Verify the 32.
After that, you get to figure out what is wrong. Does this happen everytime you're on the highway cruising steady state? If so, you may have an actual EGR problem like a stuck/defective EGR valve, broken EGR solenoid, clogged vac lines/ports. If it's intermittent (and it still helps to check the above things) then welcome to the SD club. Mine was the same way, but everything in the system looks fine. My solution was to disable code 32 in my PROM so i don't have to get annoyed by it anymore. The problem is that the way the computer checks for an EGR fault is a hard test to pass, and even a functional system can fail it sometimes. Rather than beat myself up over it, i disabled it.
------------------
Ed Maher - Moderator @ The Carb Board
92 Z28 Convertible - Quasar blue / Tan top
LB9 4L60 GU2 G80 - stock, soon to be sleeper
-=ICON Motorsports=-
- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die
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