Go Back   MustangForums.com > Ford Mustang Tech > 5.0L (1979-1995) Mustang
Sign in using an external account
Register Forgot Password?
Search


5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
Sponsored by Weld Racing


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, 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 free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 12-10-2014, 04:52 PM   #1
Sanborn87
 
Join Date: Dec 2014
Vehicle: 1989 mustang lx 5.0
Location: South Carolina
Posts: 1
Default Please help

I have an 89 mustang 5.0 manual. Here recently it's been losing power. When I crank it, it idles fine, even if I rev it. Once I actually get moving it is sputtering. If I accele slowly it will move a little better. If I hold it wide open it backfires sometimes but will not go any faster. I changed fuel pump, filter , cleaned out mad and tps. Any help please
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
Sanborn87 is offline   Reply With Quote
Old 12-10-2014, 05:12 PM   #2
dawson1112
5th Gear Member
 
Join Date: Jul 2012
Vehicle: 1990 lx hatch 5.0
Location: ohio
Posts: 2,786
Default

KOEO/KOER check for codes.
Check fuel pressure at the rail
When was the last time the car had a full tune up ? Plugs wires cap rotor air filter ?

It could be a faulty coil, faulty TFI module, faulty PIP.
__________________

Last edited by dawson1112; 12-11-2014 at 04:28 PM.
dawson1112 is offline   Reply With Quote
Old 12-11-2014, 09:18 AM   #3
88 orangepeel notch
5th Gear Member
 
88 orangepeel notch's Avatar
 
Join Date: Mar 2010
Vehicle: 1988 notchback
Location: Wisconsin
Posts: 2,077
Default

Welcome to the forum, if you don't know what dawson is talking about, use the search feature and do a little reading. There's a ton of info on this site to dig thru and it's all been covered before. Good luck
__________________
306 with all bolt ons, letter cam, ported E7's, T5 swap, full exhaust, 3:55's, 2" drop, and the worst paint you'll ever see or feel.
Dyno'd 300/316, 2745lbs-track scale
Best ET………12.4@108, 1.66 60ft on 8" ET Drags.
24 mpg (combined)
88 orangepeel notch is offline   Reply With Quote
Old 12-15-2014, 03:53 AM   #4
Js88lx
3rd Gear Member
 
Js88lx's Avatar
 
Join Date: Jan 2011
Vehicle: 94 Cobra
Location: mid Cali
Posts: 833
Default

Like daswon said. Sounds like your dizzy might be the issue. I had this problem before. Bad pip more likely. Word of advice, if you do buy a new dizzy make sure its new NOT a rebuilt/remand. They are garbage.
__________________
94 Cobra Virgin Ms Virgin
89 gt (coca) SOLD
86 5.0 vert (work in progress)
Js88lx is online now   Reply With Quote
Old 12-25-2014, 03:40 AM   #5
leftyatm
1st Gear Member
 
Join Date: Oct 2007
Posts: 82
Default

Mass air sensor dirty or needs replacing.
leftyatm is offline   Reply With Quote
Old 12-25-2014, 03:40 AM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

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 Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 11:20 AM.

© Internet Brands, Inc.


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. Ford® is a registered trademark of the Ford Motor Company
Emails Backup