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Old 11-08-2009, 05:19 PM   #1
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Default 1985 -302 EFI -Starts but dies
The truck starts,revs to 2k then dies if you don't give it gas. It won't idle at all. I replaced the fuel filter and the IAC . Any ideas what my be causing this trouble? Truck is a'85 f150 with 115k on it.

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Old 11-08-2009, 06:35 PM   #2
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had similar issue with my probe a while back it wouldn't stay running at idle unless you kept giving it gas. But once the engine warmed it would run better not good but better. it was a crack rubber hose for the turbo. so maybe a vacuum leak somewhere. also a cavalier i had it would turn over start and die right away it was a map sensor those i know you can check by voltage.
good luck
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Old 11-16-2009, 12:24 AM   #3
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Check your ported vacuum switch(s). A stuck switch will cause a poor idle.
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