katy91

my car runs good, has low miles, its had a lot of work done to it especially recently, but this had always happened if i drive for maybe 15 min straight especially on the freeway my check engin light comes on..... ive had my transmisiom serviced not too long ago and everywhere i take it they say nothings wrong with it but i was just wondering if this had happened to anyone else... thanks.

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Bullydawg

Maf Burnoff Relay? I had the same problem.

Edit: Your TBI. I would scan for the code. I usually use the paperclip trick... Very helpful

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JulieGTA

There's a plug under your steering wheel, it looks like the end of a computer cable, with little holes to stick a paper clip into.
http://www.thirdgen.org/service-engi...ht-error-codes

When mine did that it was the EGR going bad. It won't pass smog but it shouldn't really affect the way it runs.

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1991 GTA, CA smog legal; stock 350 block; ported & extrude honed: plenum, Edelbrock runners, TPIS intake; 24lb injectors, 1.6/1.5 roller rockers; Ported 113 L98 Heads, Lt4 hot cam, built 700r4, 2400 stall, 3.23's; 1 3/4" Dyno Don shorty headers, 3" dual catback; Magnaflow; strut brace, steering brace, subframe conn, KYB "grays"; Previous best 1/4 13.35@101; 285h/320tq (diffrent cam,) Current: 322hp & 378tq, unraced.

Z28 ENTHUSIAST

I know this is a week old. Does the check engine light stay on when you continue to drive then once you shut off the car it goes out? I had this problem and it was a vacuumm problem, one that went to the EGR.

Russ-So Cal

If the check engine light comes on, you can use the paper clip as mentioned above to get the code. The ecm will set a code if the check engine light comes on for more than a few seconds. Until you get the code and post it, all anybody can do is make wild guesses.

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"Aerodynamics are for people who can't make horsepower"-Enzo Ferrari