Stalling/low idle
Thread Starter
Racer
Joined: Mar 2016
Posts: 344
Likes: 65
From: Ontario, Canada
Stalling/low idle
Just bought a 1990 vert and drove it home 6 hours with no problems. The issue I have is that if I blip the throttle it will either almost stall and then recover or stall. It always restarts no problem and seems to idle pretty good but maybe a bit high. Any ideas where to start?
Drifting
Joined: May 2020
Posts: 1,663
Likes: 702
From: Baton Rouge, Louisiana, metro area
Stall
My friend’s 90 had worn out injectors when his was doing that. But that diagnosis would come after some testing. If you don’t already, get the official GM Service Manual off eBay or somewhere, a good quality digital ohm meter and fuel pressure gauge, and start reading this forum!!!
Congrats on your car.
How about some pictures?
Congrats on your car.
How about some pictures?
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
I'd get the PDF one that is searchable.
Fuel pressure gauge you can buy cheaply or get a loaner tool.
Drifting
Joined: May 2020
Posts: 1,663
Likes: 702
From: Baton Rouge, Louisiana, metro area
Injectors
I can’t recall the specifics which is why I recommended to the OP to start diagnostics with the manual, goods tools, and this forum.
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
After trying new TPS and CTS, he told me he and his mechanic friend tested them and said some were going to ground when hot or something (it’s been a while since we discussed this). He changed them all several years ago and has had no problems since. I expect to see him this weekend, I will ask him.
I can’t recall the specifics which is why I recommended to the OP to start diagnostics with the manual, goods tools, and this forum.
I can’t recall the specifics which is why I recommended to the OP to start diagnostics with the manual, goods tools, and this forum.
