1994 3.8 fuel injection questions - Ford Mustang Forum
LinkBack Thread Tools
post #1 of 3 (permalink) Old 09-08-2019 Thread Starter
dodge55's Avatar
Joined: Jun 2005
Location: Kennesaw
Posts: 8
1994 3.8 fuel injection questions

I have questions for the experts on fuel injection engines. I am pretty good with carb engines as I have a couple of older cars. But, I've never messed around much with troubleshooting FI engines.

So, two+ years ago, I had 2 blown head gaskets on my 1994 V6, in which I have finally replaced and gotten back together. I babied the car to 220K miles and I wanted to keep it as it's a 5 speed. I had other cars to drive, so it wasn't a top priority. Anyway, it's back together after 2+ years, and it started right up, but it won't stay started. It sputters, and will only stay started if I keep a little pressure on the gas pedal. If not, it will stall every time. And, it takes holding the pedal down for 5 seconds again before it gets started again. But, it will stall again. It feels fuel related like the mixture isn't right. I'm getting a friend of mine's fuel pressure gauge to see what I read on the rail port. Let's say it's high. How do you fix that? Isn't that controlled by the ECU as opposed to an adjustment? Could it be the fuel pressure regulator? If it's low, how do you fix that? Could it be the MAF sensor? Everything seems to be hooked back up properly, vacuum lines, connections, and it was a fairly easy rebuild even if it took a while. So, it probably something simple I'm overlooking.

In any case, I'm looking for a little troubleshooting help so I can get it running. What are the steps? Thanks in advance.


dodge55 is offline  
Sponsored Links
post #2 of 3 (permalink) Old 09-09-2019
GT Member
Urambo Tauro's Avatar
Joined: Mar 2010
Location: SE Mich
Posts: 1,754
I suspect you're on the right track, checking fuel pressure. Have you checked for stored codes?

1995 Mustang GT (5.0), daily driver
1995 GMC C2500 (5.7), alternate daily driver
Urambo Tauro is offline  
post #3 of 3 (permalink) Old 09-09-2019
PONY Member
Travis98146's Avatar
Joined: Jun 2016
Location: Seattle
Posts: 964
If you have to open the throttle to keep it running, it sounds like you need more air to keep it going. That indicates you have a choke that's staying closed (which it will until you get to operating temp) or your throttle position sensor is stuck/out of adjustment/not properly connected.
Travis98146 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:


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 On
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

Search Engine Friendly URLs by vBSEO 3.6.1