well it coems on for about 10-15 sec after 2-5 min of running, cuts off, comes on again, and repetativley keeps doing it..over and over and over...what cuts on then off!!!
all my egr stuff is gone, programed it out of the pcm, have electric fan switches or maunal fan switch....could it be a vacuum leak? if so would it cause and ses light?
please help..
randy
thanks

 

Do you have VATS? My 90 IROC was doing that and turned out it was the VATS chip going bad. Try getting another key made and see if it helps.

-Nate

 

it would cause a SES lgiht? and i do have another key....
i sprayed some Gm oil stuff in there, that was mde for it to make it easier to slide in....
but i dunno..ima have it checked out hopefully tonight..if not then tom..
randy

 

Why don't you just get it scanned, rather than making wild-a$$ guesses?

 

i am, im just waiting on the guy who has the LT1 edit program..he was busy today and he is going to do it tom...