why 1877 f 100 want idle under 1500 rpms ?

110

Asked by Jan 27, 2019 at 02:12 PM about the 1977 Ford F-100

Question type: General

I have 1977 f100 302 rpm intake eldelbrock 1405 carb. camb. no vacuum leak want idle uner 1500 rpm when i drop in drive rpm drops to 5 600 rpms can not fine the problem need help  

8 Answers

252,475

Did you adjust the idle screw on the throttle linkage? Do the butterflies close completely?

110

idle will not adjust and run under 1500 rpms

252,475

I think you have a vacuum leak.

110

no vacuum leak i can close my choke when it is running put n my hand over carb to block off air motor dies motor dies can not find a vacuum leak ck. with carb. cleaner i am wondering if the problem could be my tourk converter

252,475

Are you familiar with carbs or are you just guessing? The transmission is not going to make it idle high. The reason it is idling high is that air is bypassing the carb (vacuum leak). Make sure your ignition timing is not set to far advanced but I doubt that could cause a high idle like this.

1 people found this helpful.
252,475

https://www.oldcarsweekly.com/restoration/make-vacuum-leaks-hiss-tory

110

I know the trany. want cause it to idle hi BUt it want idle At all in gear without holding My foot on the gas and brake at same time

110

THANK YOU I FOUND THE PROBLEM WRONG GASKETS

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