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post #1 of 5 (permalink) Old 05-25-01, 01:39 PM
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mad High Idling Problem

Have tried everything I can think of for this problem. It idles too high. I have turned down the idle and adjusted the timing many times. Put two used and one brand new idle sensor in.

It hunts now...it is high and then low, high and low..soars very high when only re-starting car will put it back to normal. Drive a bit and it reverts back to 'hunting'.

Have talked to a ford tech (no longer employed with them) who told me there was a recall on Mustangs (not sure what year) to fix this problem...he also said something about a 'jumper cable' made to fix this problem.

Does anyone know what he is talking about and/or how to fix this problem short of going to ford dealership?

I am major frustrated/fed up here :fmad:

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post #2 of 5 (permalink) Old 05-27-01, 04:52 PM
Mustang GT Member
Join Date: Apr 2001
Location: Ohio
Posts: 7

Have you tried cleaning the IAC valve or the wire on the Mass Air Meter?

The IAC valve should be cleaned once a year (kinda like changing the fuel filter)..whether you think it needs done or not...
Banzai56 is offline  
post #3 of 5 (permalink) Old 06-03-01, 10:59 PM
Mustang GT Member
Join Date: Feb 2001
Location: Hatfield, PA
Age: 53
Posts: 15
I had this problem, exactly as you describe.

First, you can find out about your car's recall history by supplying your VIN to a Ford dealer. I have never heard of the recalls you describe, but I only know about the 1993 recalls.

Recently I purchased a Cobra intake and when I had it installed the mechanic found a dry-rotted totally worn vacuum hose that lives under the intake and connects to other vac lines behind the intake. We replaced it and the "hunting" idle stopped. Have your car vacuum tested, I think 16" is what you need. Also, make sure the metal mesh screen under the pcv valve is new and not the gunked-up original. Just because you replaced your TPS, doesnt mean it's set correctly - shoot for .99 .

Pick up a code reader from Sears for $35 and check for codes. I ended up needing a BAP sensor! If you have an exposed conical K&N, you are getting "fan wash" and that is confusing your MAF and screwing up your idle.

Good luck

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Rich93GT is offline  
post #4 of 5 (permalink) Old 06-28-01, 09:34 AM
Mustang LX Member
Join Date: Mar 2001
Location: Arlington, VA
Age: 31
Posts: 10
The TPS shouldn't affect idle, but go ahead and check it anyway. Checking your vacuum lines is a good idea, and he makes a good point about the exposed filter, the fan wash will do it.
dinomite is offline  
post #5 of 5 (permalink) Old 07-01-01, 09:25 AM
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Read this and give it a shot.


What kind of mods do you have done too? A little more info will help.
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