i have a 95' Z28 and sometimes when my car is running at a low rpm in 6th gear, at say 55mph and like 1500rpms the service engine light will come on. The car always runs fine and when i shut it off the light will go out and stay out. It's only did it a few times since i've had it and i'm not to concerned about it. But what do u guys think it is. Thanks

 

leave your car on the next time this SES light happens and get it scanned to find out what the code is!

 

I already know what it is without you getting it scanned i bet on it but scan it anyways. Its your EGR

 

More than likely.

If you get an SES light, don't guess about why, get it scanned (or better yet, buy a scanner).

 

X2

Guessing the code is a waste of time & money in the long run ~ buy a scanner or go to one of the Auto Parts stores who do it for free.

PS: Rob, you could start a new game show here on CZ28 "Guess the OBD code"

 

Can the EGR be cleaned, I had an s-10 blazer that I cleaned the EGR valve.

 

you dont have to leave the car on to pull the code. the code is stored for 50 turns of the key

 

I think you could spray it with some carb cleaner and see if that fixes it. Otherwise it's $150-300 or you can just delete the system (unless you have inspections/smog)