?5.8 Bronco wont idle on it's own?

80notch

80notch

Forum Member
92 Bronco. Swapped in a different long block into the truck. Has a slightly bigger cam(Windsor firing order) and put headers on it. Still fuel injected. Have a hard time getting it started just have to give it some gas. Once its running you got to keep in the gas to keep it running. Messing with the timing does nothing. Vacuum leak? What should I be looking for? Any help is appreciated.


Thanks
 
that or a vaccum leak, IAC is a distinct possibility but if you have access to a vaccum tester I would also give that a shit could be a vac line or intake gasket? however IAC is a common issue
 
If you have to give it a slight pedal to start it and have to hold for it to idle its 99% of the time the iac. If you have to give it a slight pedal to start and then it races up then stalls after letting the pedal return to idle its normally a vac leak.
 
Try cleaning the Throttle blade and the throttle blade hole. Alt of time the IAC can not make enough airflow to idle the motor on its own.
 
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