Timing Advance????
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Timing Advance????
What is the timing advance for a 91 f150 302 w/EFI? Been working on the truck all weekend and now it wont run because timing is off. Idles fine and when you rev it up it runs fine but once a load is put on it, it sucks. I have it set at 0 right now...please help, need to drive to work.
-jon
-jon
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jess, i just got done timing it to 10 degrees btdc (with the spout connector removed). when i hooked everything back up and ran it, it ran like a sports car. feels like a new truck again. granted i just replaced just about every part and sensor on the ignition and vacuum systems but hey, it was worth it. let me know if you continue to have problems.
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No it wont do anything to the idle speed , you're truck will have alot more pep with 14* timing. One thing though if you get any engine ping back it off 1 degree at a time until there is no more engine ping. There are other ways to unleash 5.0 power if you have any questions feel free to ask 
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actually, i already installed a K&N FIPK. That helped. Question: how far is the butterfly valve on the throttle body supposed to open? when i revved the engine manually with the intake hoses off i noticed it didnt open very much when the engine was at high rpms. I also noticed that most of the air is entering through the IAC valve. Is that normal?
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oh it will fully open with the engine off but with the engine running it doesnt move much to get high rpms. what can i adjust to increase the airflow through the butterfly valve and bypass the IAC? keep in mind the IAC is brand new.
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The butterfly valve open and closes with the throttle cable as far as I know. I would reset the computer by disconnecting the battery for about 30 minutes to start back off at ground zero. That will help your idle normalize faster.
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