1990 runs won't idle
05-21-2013, 07:13 AM
#2
Drifting
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)
05-21-2013, 07:50 AM
#3
Pro
Thread Starter
Member Since: Mar 2011
Location: 40 miles N. of the Everglades
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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.
05-21-2013, 08:31 AM
#4
Melting Slicks
Member Since: Sep 2008
Location: Cherokee National Forest TN
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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
05-21-2013, 08:34 PM
#5
Le Mans Master
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.