I have a 91 Mustang GT with gt40 intake manifold and gt40p heads. It seems to me that something is causing the car to add to much fuel and advancing the timing way to much and at about 1,500 to 2,000 rpm it just backfires and spits and sputters and does not go further than 2,000 rpm. When i got the car i had noticed the maf sensor was unplugged and all the problems started when i plugged it in . I have been running in circles since February since i got the car and at this point anything helps.
Big problem and no idea what to do.
- Thread starter 91MustangGT1991
- Start date
-
Sponsors (?)
I take it you bought it this way,
go here and do this checklist step by step, don't skip around.
Post here any questions you have.
forums.stangnet.com
go here and do this checklist step by step, don't skip around.
Post here any questions you have.
Help me create the "Surging Idle Checklist"
Updated 26-Oct-2019 to clarify creeping idle RPM increase as the car is being driven. Many of you are familiar with the "Cranks OK, but No Start Checklist for Fuel Injected Mustangs" checklist and the No Crank Checklist. They are very effective in finding and eliminating the problems by use of...
forums.stangnet.com
Its going to be some work to figure it out. We have all been there with the list. Sounds messy I would consider finding a Mustang expert only because you seem to know a little about cars, but your problem seems like you need specialized diagnostics . Get it going and start fresh. Just my opinion from when my car was messed up and I tried everything.....It was the PIP
Gas cutting out at 2000 rpm maybe?? You do have to do the checklist no fun whatsoever I would assume you have read more tech on fixin your car, so your at a crossroads. An old fashioned mechanic who knows old cars could figure it out in a couple of hours you just have to ask around. JUST MY OPINION
The checklist seems intimidating at first, just start at the beginning and take notes. One step at a time.
Then you can take satisfaction that you fixed it yourself.
Then you can take satisfaction that you fixed it yourself.
It is driving me nuts we have been having super nice weather and it bums me out not to be able to cruise around in it. And i will definitely let you know i appreciate all your help!
Check some basics. Check your firing order and make sure the plug wires are correct. Then verify your timing is correct.
Chris
Chris
If you can get your hands on a spare meter (assuming it still has a stock meter and injectors), try swapping it in. While it's no guarantee, in my experience when a vehicle runs better without the meter, the meter itself has been the problem.
- Mar 7, 2002
- 9,432
- 5,380
- 224
- Mar 7, 2002
- 9,432
- 5,380
- 224
Similar threads
