Mustang GT RPM issue - Need Advice - Ford Mustang Forum
LinkBack Thread Tools
post #1 of 3 (permalink) Old 03-29-2010 Thread Starter
PONY Member
S197 Member
Mustanglou's Avatar
Joined: Mar 2009
Location: Wildwood
Posts: 376
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
Mustanglou is offline  
Sponsored Links
post #2 of 3 (permalink) Old 03-29-2010
Classic Member
S197 Member
stlwagon's Avatar
Joined: Oct 2005
Location: Southern
Posts: 72,881
Send a message via Yahoo to stlwagon
You could have a failing throttle position sensor.

1965 Mustang Coupe
stlwagon is offline  
post #3 of 3 (permalink) Old 03-30-2010
SHELBY GT 500 Member
S197 Member
travelers's Avatar
Joined: Sep 2006
Location: Eastern
Posts: 10,877
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.

2011 GT Candy Red
travelers is offline  
Sponsored Links
Closed Thread

Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

For the best viewing experience please update your browser to Google Chrome

Search Engine Friendly URLs by vBSEO 3.6.1