Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Other Ford Engines > 4 Cylinder Engines
Sign in using an external account
Register Forgot Password?


Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 07-21-2004, 08:28 PM
CathyT CathyT is offline
New User
 
Join Date: Jul 2004
Posts: 9
CathyT is starting off with a positive reputation.
Wink Idling high in Neutral

Dealership could not fix problem....so I'm turning to all of you! When I let off the throttle, put manual trans. into N, the engine still rev's at around 2.5-3k RPM's for about 5 seconds and then notches it way down to normal. It will go from 3 to 1.5k then to normal idle. The RPMs go to a "normal" speed when engaged in a gear. For instance, when driving and changing from 2nd to 3rd gear, when depressing the clutch the Tachometer does not fall for the second it takes to change gears, it stays rev'ed, then once the clutch is released and the gear is engaged ,the RPM's are appropriate for the speed and gear.

The IAC valve was changed but this did not fix the problem . Do you think it could be the Throttle Position Sensor? It has been hot outside the AC was on initally but then shut it off and the problem still existed. The engine did not rev in the morning...it was much cooler. Thanks in advance
Reply With Quote
  #2 (permalink)  
Old 07-22-2004, 09:40 AM
tomw tomw is offline
Postmaster
 
Join Date: Jan 2002
Location: suburban atlanta
Posts: 4,054
tomw has a very good reputation on FTE.tomw has a very good reputation on FTE.tomw has a very good reputation on FTE.
Nice problem statement.
But. Need to know the year and engine/trans you are running. The IAC controls the idle on a MAP system, but an air leak elsewhere from the IAC will allow for a high idle. On MAF systems, extra 'unknown to the MAF' air will cause a poor idle and hesitation, for instance . If you have ODB-II, you can read the commands to the IAC to know if the ECM is telling it to keep the idle up. I'd check for codes to make sure that the hi idle isn't trying to compensate for some other item that is malfunctioning.
tom
__________________
It's not how hard you work, it's how much you get done. Simplificate and add lightness
Reply With Quote
  #3 (permalink)  
Old 07-22-2004, 11:34 AM
CathyT CathyT is offline
New User
 
Join Date: Jul 2004
Posts: 9
CathyT is starting off with a positive reputation.
uh oh...it's a 6 cylinder...

see you in 3.0L V6 thread....I'll continue there
Reply With Quote
Old 07-22-2004, 11:34 AM
Reply

Go Back   Ford Truck Enthusiasts Forums > Performance, Engines & Troubleshooting > Other Ford Engines > 4 Cylinder Engines

Tags
high, idling, neutral, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 05:36 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup