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Old 09-01-2004, 08:00 PM   #1
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Default High idle?

I've been experiencing a high idle speed. When the car is cold, the start revs kinda high, then idles about 1500. Today, hot car, hot outside, 1100 rpm. It'* higher than it used to be before I put in the new pump 300 miles ago. I replaced an old/cracked vacuum line on the main vacuum manifold. Got a smoother idle, but no change in speed.

Any ideas?
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Old 09-01-2004, 08:18 PM   #2
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Something in the tranny maybe?
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Old 09-01-2004, 08:19 PM   #3
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When it'* in park?
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Old 09-01-2004, 08:22 PM   #4
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Quote:
Originally Posted by jwikoff99
When it'* in park?
Yea, had a Taurus that Idled high in park, then fine in drive.
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Old 09-01-2004, 08:37 PM   #5
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Have you checked your IAC valve to see if its clogged with carbon? This adjusts your idle on the t-body....it'* bolted right on the throttle body -- maybe some has a pic they can share that willl show its exact location.

I'd take that little guy out (careful not to strip or break the bolts) and clean it up.
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Old 09-01-2004, 08:39 PM   #6
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I know where it is, and, oddly enough, I have a clean spare. Maybe I'll swap em.
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Old 09-01-2004, 08:44 PM   #7
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Quote:
Originally Posted by Twister97
Quote:
Originally Posted by jwikoff99
When it'* in park?
Yea, had a Taurus that Idled high in park, then fine in drive.
It wants to move faster when I let off the brake, also. I don't think it'* tranny related. It is reducing my gas mileage, though.
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Old 09-01-2004, 08:48 PM   #8
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Dude, it'* not the IAC. If that were gummed idle speed would reduce.

I suspect a leaky injector.
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Old 09-01-2004, 08:51 PM   #9
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Maybe the carbon is uneven, leaving gaps when the IAC thinks it is closed. You never know. A leaky injector would not make me happy, but I did just send out my originals to get serviced.
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Old 09-01-2004, 09:09 PM   #10
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I don't know guys, it was just a guess, I was just trying to think about all the parts in the system that control idle....how about the TPS, could that be suspect as well?
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