1991 Mustang GT Starts then dies immediately - Page 2 - Ford Mustang Forum
LinkBack Thread Tools
acetum's Avatar
Joined: Oct 2009
Location: phx
Posts: 116
Originally Posted by chadwick108 View Post
I am kinda having the same problem...but i think that the mass air flow sensor is faulty...I am not having a problem with car not idling...but it idles at 2000 rpm. please help
Check your fuel pressure.. if it does not remain constant @ 38psi (under load, not at idle) or more then your pump is bad.
acetum is offline  
Sponsored Links
acetum's Avatar
Joined: Oct 2009
Location: phx
Posts: 116
Originally Posted by mespe View Post
Hi All,

First post here, I have a '91 Mustang GT. It has been running fine since I fixed her up. But my wife drove it the other day and now it stalls after starting it up. It used to run rough then stall, so I took off the EGR and noticed a piece of carbon preventing the valve from closing all the way. I said whola I found it, so I cleaned out the carbon and checked for proper closing and it appears to be A-OK. put it back on the car and now the car starts, then immediately stalls. As if the choke isin't on in the middle of the winter. Any suggestions?

Thanks a bunch.
Go back to basic's.

First make sure you have 5v present at all your basic sensors. Set your TPS voltage like someone posted earlier.

If the IAC didn't fix it take it back... lol

Clean your MASS, maybe even consider replacing it.
Set your TPS voltage.
Clean your sparks.
Start with your timing. Then reset your memory.
Then check your fuel pressure, under load & at idle.

If you start shot gunning parts you'll be there for a long time. What's your air filter look like?

The computer compensates for every little thing.
acetum is offline  
andrewhicks22's Avatar
Joined: Sep 2010
Location: sacramento
Posts: 20

Im having the same problem in my 1990 lx it starts thin automatically dies and i keep pumpin the gas pedal it will idol high but if i open the gas pedal all the way it just dies so have no clue what to do mine is acting really funny and i dont no what to do.
andrewhicks22 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

For the best viewing experience please update your browser to Google Chrome