Mis once warmed up - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1979-1995 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 11-18-2011, 07:38 AM   #1
Registered Member
Regular
 
Chefnick's Avatar
 
Join Date: Sep 2011
Region: Maryland
Posts: 31
Mis once warmed up

Know you have all heard this before but I'm trying one last time before I bring it in to someone. This has got me going crazy.

The car runs as smooth as a new car when it is cold and has not fully warmed up. Once the car is warm, it runs ruff. It's hard to explain but it seems like it is bogging down. Kindof sounds And runs like it would If you shift to a Higher gear to soon if that makes sence. But it runs like that all the way threw 4 th and 5 th. It runs a bit better in higher rpms but at lower rpms it's not great.

It's got new plugs, wires, tps, icm, fuel pressure regulator, fuel filter, distributer, cap and rotor. Any other thoughts to try. It also is running rich. I want to think it is a fuel issuer but I'm not sure. Thanks for the help.
Chefnick is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-19-2011, 06:31 PM   #2
Road Trip!
 
Join Date: Apr 2011
Region: Indiana
Posts: 8,044
Sounds maybe like timing.
dreamstang is offline   Reply With Quote
Old 11-19-2011, 09:53 PM   #3
Registered Member
Regular
 
Ilovemustangs88's Avatar
 
Join Date: Nov 2011
Region: Pennsylvania
Posts: 158
My 2000 mustang does that too. In low gears it hesitates to shift and sometimes when driving you hit the gas and nothing happens and I have had to coast to pull over til it wanted to go again. But sometimes it shifts slow and shifts hard. Mine is an automatic
Ilovemustangs88 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-19-2011, 11:11 PM   #4
Registered Member
Regular
 
Chefnick's Avatar
 
Join Date: Sep 2011
Region: Maryland
Posts: 31
If anyone has the same problem and reads this I just want to tell them what it was. It was the o-rings on the injectors. Pulled them all off, changed the rings and she runs like new. Also adjusted the timing a bit after.
Chefnick is offline   Reply With Quote
Old 11-20-2011, 09:09 AM   #5
Registered Member
Regular
 
Ilovemustangs88's Avatar
 
Join Date: Nov 2011
Region: Pennsylvania
Posts: 158
I'm going to try that thanks
Ilovemustangs88 is offline   Reply With Quote
Old 11-20-2011, 12:26 PM   #6
Road Trip!
Supporter
 
Join Date: Jun 2006
Region: Missouri
Posts: 8,779
Re: Mis once warmed up

Quote:
Originally Posted by Chefnick View Post
If anyone has the same problem and reads this I just want to tell them what it was. It was the o-rings on the injectors. Pulled them all off, changed the rings and she runs like new. Also adjusted the timing a bit after.
Congratulations on finding and curing your issue.
That was a difficult one and you managed to find and fix it.
Trojan Horse is offline   Reply With Quote
Old 11-20-2011, 12:27 PM   #7
Road Trip!
Supporter
 
Join Date: Jun 2006
Region: Missouri
Posts: 8,779
Re: Mis once warmed up

Quote:
Originally Posted by Ilovemustangs88 View Post
I'm going to try that thanks

If that doesn't help your issue, just post up you problems in another thread and we'll do our best in trying to help you sort it out.
Trojan Horse is offline   Reply With Quote
Old 11-21-2011, 05:37 PM   #8
Registered Member
Regular
 
Ilovemustangs88's Avatar
 
Join Date: Nov 2011
Region: Pennsylvania
Posts: 158
My mustang is going to the garage Friday I'll post what it turns out to be!
Ilovemustangs88 is offline   Reply With Quote
Old 11-21-2011, 05:53 PM   #9
Registered Member
Regular
 
Furious35's Avatar
 
Join Date: Oct 2011
Region: Arkansas
Posts: 24
I can almost garuntee it's your o2 sensors. What happens is the ECM uses a default program or bin files what we call a closed loop where it doesn't use any sensors for air fuel timming ect. It uses pre programed fuel maps ect. Therefore running normal until it reaches 170 degrees. Now once warmed up it relies on sensors 94-94 sn95 cars primarly use O2s. For air/fuel they due use IAT MAF TPS ECT but most the time O2s are to blame for rich running condition. Hope this helps
Furious35 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1979-1995 Mustang GT

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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mis Chefnick 1979-1995 Mustang GT 11 11-20-2011 09:06 PM

» Like Us On Facebook



09:00 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.