98 Cobra High Idle Problem - MustangForums.com

Notices
SVT Forums

98 Cobra High Idle Problem

Old 04-23-2008, 08:13 AM
  #1  
Paul_B
Thread Starter
 
Join Date: Apr 2008
Posts: 1
Default 98 Cobra High Idle Problem

I've got a bone stock 98 Cobra with 36k miles. After driving in traffic for a period of time, it will idle at 1200-1600RPM's. If you shut it off and instantly restart it, it will idle normally for a while. It doesn't do this every day and *seems* to happen more oftenwhen it's warmer and more humid outside (NE Ohio conditions) or if I take off and have the engine speed lower than where it might idle at.

Also sometimes right before it acts up, the idle speed will start wandering from about 800 RPMs to 1200RPMS beforegoingto the high idle. No check engine light. Other than that, the car runs totally fine. Is this a bad Idle Air Solenoid?

Thanks in advance!
Paul_B is offline  
Old 04-27-2008, 10:24 PM
  #2  
pitmitch910
2nd Gear Member
 
Join Date: Mar 2008
Location: Ohio
Posts: 362
Default RE: 98 Cobra High Idle Problem

i hav a 97 cobra and i live in ohio(weirdest weather pattern in America) but it sounds like it could need a Throttle Postion Sensor.
pitmitch910 is offline  
Old 04-30-2008, 04:57 PM
  #3  
slithersvt
 
Join Date: Jul 2007
Posts: 3
Default RE: 98 Cobra High Idle Problem

Had the same issue with my '01. TPS did the trick. It is easy to replace yourself.
slithersvt is offline  
Old 01-30-2019, 09:10 AM
  #4  
stanger19899ddr
 
Join Date: Aug 2012
Location: tx
Posts: 1
Default Similar isle issue

I have a 1996 cobra I bought. The owner I bought her from took the intake off and was going to add a supercharger but didnít finish his projec. When I purchased it it had no intake and the modified imrc with the butterflies removed. I purchased an intake and put it back to stock. Issue is it will start and run but the idle will not drop below 1400 and usually sticks from 1400 to around 16 to 1800. Thought it has a bad tos or throttle body so I purchased another and still have the same issue. Did anyone every flags this issue ???
stanger19899ddr is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Diode Dynamics
Vendor For Sale / Group Buy Classifieds
5
02-28-2018 11:39 AM
YoungStangsMan
5.0L (1979-1995) Mustang
15
09-05-2015 08:01 PM
1987gt40ttopt
5.0L (1979-1995) Mustang
12
08-28-2015 11:49 PM
rocket22
4.6L (1996-2004 Modular) Mustang
0
08-28-2015 08:08 PM
djbigskrilla
2005-2014 Mustangs
13
08-11-2015 01:59 PM


Thread Tools
Search this Thread
Quick Reply: 98 Cobra High Idle Problem


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.