Zincpony

when i first turn the car on. it idles at around 1300RPMs. i have to rev the engine a few time to get it to go below 1000RPMs. why is that all the sudden

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Dangerfield23

Have you tried cleaning the IAC valve?

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'84 F150 StepSide w/5.0 Mustang EFI Engine

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88GT40

it not wrong for that to happen it's like a choke but the computer regulates it, in conjuction with the iac vale and tps sensor, you should not rev the engine until it has had a few minutes to get a little warmed up and you shouldn't drive it hard until your into the normal range.

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razarr69

yeah man that is what its suppose to least i think so, mine does it fer a few minutes depending on tha temp outside, it does it at about 1100 then drops to bout 800 er so then i take it easy fer tha first couple of km to let it get warmed up.