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Old 03-04-2014, 02:02 PM   #1
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Join Date: Jan 2014
Location: Baza, Spain
Region: Europe
Posts: 16

My 2000 Mustang 3.8 V6 5 gear was idling at 1300-1500 rpm.
I cleaned the IAC valve but then it made a weird 'screeching' noise from somewhere
in the throttle body and cut out when I took my foot off the accelerator.
I put it in the garage and they replaced the IAC, but they could only find a used unit to replace it with (I live in Spain).
The car still idles at 1500 rpm until it has been driven for some time. This is a nuisance, especially when using the engine to reduce speed on downhill stretches. My manual says it is not possible to adjust the idle speed and that I should take it to a Ford dealer.
Any suggestions please?

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Old 03-04-2014, 03:46 PM   #2
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Join Date: Dec 2013
Location: Live Oak, FL
Region: Florida
Posts: 8
I had a similar problem on mine. You may try Ebay to get a new or Reman unit. I cleaned my iac valve, replaced the camshaft sensor and synchronizer, spark plugs and wires and had an oil change. now it idles at 800 when hot. I think the synchronizer was the problem in mine. I'd try replacing that and sensor first

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Old 03-04-2014, 06:12 PM   #3
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Location: Gulfport
Region: Mississippi
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Contact sellers on Ebay, many will ship overseas for a extra fee.

new engine,1.7 rocker arms,Pipes exhaust, shorty cats , shorty headers,under drive and overdrive pulleys,4.2 upper plenum, throttle body spacer, cold air intake, stage one clutch, shorty shifter, and tune. 8.8 in storage
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