Mustang GT RPM issue - Need Advice - Ford Mustang Forum
 
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post #1 of 3 (permalink) Old 03-29-2010 Thread Starter
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Mustang GT RPM issue - Need Advice

I cleaned the throttle body yesterday, per my other post, not sure if this deserved starting a new one but an issue came up.

The cars RPM is hanging when I let off the gas. This happens on street driving and highway. Almost feels like cruise controll. As long as the cars moving the RPM's don't below 1K regardless how slow I'm going unless I'm breaking.

I also notice when stopping the RPMS's jump up as the car down shifts, (it's an automatic). They don't increase a ton but is noticable in sound and I can feel it pull the car forward for a split second.

I also notice the cars RPM's going down slowly when I shut it off, it used to go down instantly.

I cleaned the throttle body while it was still attached with CRC and a torn T-shirt by spraying it down fairly good.

Any ideas?


92 LX
Holly Systemax, Shorty Headers, TFS Stage 1 Cam, TFS FAC 170 Heads, Cobra Transmission, King Cobra Clutch
RWHP 317

2006 Mustang GT
JLT CAI and a Custom Tune
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post #2 of 3 (permalink) Old 03-29-2010
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You could have a failing throttle position sensor.


1965 Mustang Coupe
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post #3 of 3 (permalink) Old 03-30-2010
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Did you remove it to clean it? I would check and make sure you don't have a air leak. Check all around the TB and the rubber duck going to the TB that its secure and completely on.


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