I have the 3

Tiny
RON TRICKER
  • MEMBER
  • 2004 FORD MUSTANG
  • 92,000 MILES
I have the 3.9 6-cyl, it runs fine but when you are cruising 55-60 and hit a small hill or incline and start to put a load on the engine it will start to cough occassionally and miss, But, if you kick it down and run it hard it has no miss at all. I put a can of Seafoam gas treatment in it with 6-gallon of 92-octane and it helped it quite a bit. ?
Saturday, December 15th, 2012 AT 2:29 PM

2 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Gas tank additive rarely work. Direct injection of fuel cleaners are the only method that works.

It does sound like an injector issue.

Check fuel pressure.

Roy
Was this
answer
helpful?
Yes
No
Saturday, December 15th, 2012 AT 4:06 PM
Tiny
RON TRICKER
  • MEMBER
  • 2 POSTS
Can you tell me what the pressure should be, and how to check it, with the engine running, or just with the key on, or what, And I also want to thank you for you answer.
Was this
answer
helpful?
Yes
No
Sunday, December 16th, 2012 AT 5:53 PM

Please login or register to post a reply.

Related Engine Backfire Content

How To Fix an Engine Backfire
VIDEO
How To Fix an Engine Backfire
Instructional repair video
Backfire Repair
GUIDE
Backfire Repair
When your engine backfires it can do so in one of two ways. First and the most common way is when the engine is running a small explosion of unburnt fuel is ignited inside...
VIEW MORE