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'93 454 idle low after new fuel pump???

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Old August 1st, 2011, 3:00 PM
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Cool '93 454 idle low after new fuel pump???

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I dont know enough to say what version/or other stats??


I had an issue with the system overheating and finally would not start (on the road) at a rest stop. I had someone put a new fuel pump in and away we went. Now after the system was off for a day or two the idle is too low and dies, if I feather the throttle everything runs smooth but simply will not idle.


1. Can this be a result of the new pump delivering more pressure to the system and making it idle wrong, or is this not related, like we knocked off a vacuum hose or something while troubleshooting the system?
2. How do I change the idle speed, I assume there is an idle screw on the side somewhere?

I did not want to adjust anything until I got some feedback as to if they are related and advice on if that is normal?


Thanks so much for any help.
Old August 10th, 2011, 6:07 PM
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The IAC controls the idle.
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