89 Mazda B2200 Won't hold idle
#1
09-10-07, 11:27 AM
Join Date: Sep 2007
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89 Mazda B2200 Won't hold idle
I have a 89 Mazda B2200 pickup truck that is carburated. The truck won't idle by itself unless I keep giving it gas with the pedal. Any ideas how I can fix this?
#2
09-11-07, 06:14 AM
Some thoughts:
Vacuum line cracked/disconnected.
Engine choke only "pulling off" (opening and remaining open) when throttle is deployed, otherwise it closes again when it shouldn't be. But if your problem occurs when engine is cold and not just when warmed up, this may not be it.
Plugged carburetor idle jet.
Float level out of adjustment.
Engine timing issue. But if it were that, I'd think you'd notice other performance issues. BUT, if you have an engine vacuum problem of any sort, this may affect the timing advance/retard, also.
PCV valve sucking in too much blowby gases or engine oil at idle.
Vacuum line cracked/disconnected.
Engine choke only "pulling off" (opening and remaining open) when throttle is deployed, otherwise it closes again when it shouldn't be. But if your problem occurs when engine is cold and not just when warmed up, this may not be it.
Plugged carburetor idle jet.
Float level out of adjustment.
Engine timing issue. But if it were that, I'd think you'd notice other performance issues. BUT, if you have an engine vacuum problem of any sort, this may affect the timing advance/retard, also.
PCV valve sucking in too much blowby gases or engine oil at idle.
#3
09-14-07, 04:31 PM
Join Date: Sep 2007
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It seems to be happening on cold startups. When the car is warm it holds the idle. It's a little rough but the car stays on.
