1990 runs won't idle
Drifting
Joined: Jul 2012
Posts: 1,796
Likes: 14
From: Nampa Idaho
Could be a lot of things! How many miles and which tranny?
Our 90's don't have a MAF Sensor.
Check the Air Idle Control Valve, vacuum leaks, fuel pressure. When's the last time she had a tune up? (plugs, wires, cap, rotor, fuel filter)
Our 90's don't have a MAF Sensor.
Check the Air Idle Control Valve, vacuum leaks, fuel pressure. When's the last time she had a tune up? (plugs, wires, cap, rotor, fuel filter)
Thread Starter
Pro
Joined: Mar 2011
Posts: 701
Likes: 79
From: 40 miles N. of the Everglades
Estate car, convertible, 52K automatic no. 2 beauty. Probably less than 100 miles per year for last three years.
Inherited by family member, no history, drove flawlessly last year before intermittent failure to idle. May start/drive well then stall at idle, keep the rpms up and runs until next stop light.
Inherited by family member, no history, drove flawlessly last year before intermittent failure to idle. May start/drive well then stall at idle, keep the rpms up and runs until next stop light.
Melting Slicks
Joined: Sep 2008
Posts: 2,376
Likes: 111
From: Cherokee National Forest TN
Suggest ohm testing the injectors when cold & hot. Stock 90 injectors fail due to corn gas. IIRC ohms should be 14-16 however a forum search will provide the exact resistance. Many here use Bosch 111 injectors from Jon @ FIC
http://forums.corvetteforum.com/c4-t...questions.html
http://forums.corvetteforum.com/c4-t...questions.html
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
If you haven't, check fuel for water. Remove inlet from fuel rail or at the filter. Attach hose to line. Place line in a coffee can. Turn key but don't start it and it'll squirt maybe a quart. Transfer fuel to a Mason Jar and see if water settles out of it.
