Every time I start it, check engine light comes on after 15 minutes?

Asked by Mar 26, 2016 at 09:39 PM about the 1989 Chevrolet C/K 1500 Cheyenne LB RWD

Question type: Maintenance & Repair

My 89 chevy Cheyenne has been stalling on me lately. I replaced the plugs &
plug wires. It runs stronger but still has the same symptoms. Every day I drive
to work and around 10-12 miles away the "check engine light comes on.
Before I changed the plugs and wires it would do the same thing but run really
rough and eventually stall. Now it runs decent when the light comes on but
now and then it will run rough and/or stall. What is the next possible part to
look at? Fuel pump? Cap & rotor? Yesterday it stalled only a few miles away
and I have at least a half tank of gas. Note: if I pull over and turn it off for a
few minutes, It starts right up and the light won't come on for another 10
minutes??? You would think that if the light came on and it was warmed up
the light would come on when I restart it? So, tune-up unlikely??? More like
fuel pump pressure?? any thoughts?

4 Answers


Jumper the ALDL connector and read the codes, that should give you a place to start. If you don't know how to do this go to you tube and search- getting GM OBD1 codes- and watch the videos. And after you get the codes you may find how to fix it on you tube also, or repost them back here and someone will jump in to help you with further diagnosis.

1 of 1 people found this helpful.

What do you recommend for me to purchase to read the codes? I just purchased this truck and want to get what I need to keep it running. Thanks,


If you want to buy something then purchase a scanner that can do GM OBD1. I have an INNOVA myself see pic.

1 of 1 people found this helpful.

great ! Thanks

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