Surging/dying
Thread Starter
|
New User
Joined: Jan 2017
Posts: 5
Likes: 0
Surging/dying
Hi I have a 1986 f150 xl 302 efi recently I have had my RpMs surgig and my truck will die. It doesnt have a problem if I'm on the throttle. I have also been getting very bad gas millage hardly even 5 miles per gallon if I baby it. Any ideas on what could be the problem would be greatly appreciated I have also put in all new fuel pumps and changed my fuel filter and did a new cold air intake and ran fuel treatments to see if I had clogged injectors
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
What kind of fuel delivery system did you install? Factory or aftermarket electric pumps? What kind of intake (mods)? Who did the installation?
So, you're saying you - or somebody - changed the fuel delivery & air intake systems on a computer-controlled engine, but now it's not running right and gets 5 MPG and now the computer's not happy... shocking....
So, you're saying you - or somebody - changed the fuel delivery & air intake systems on a computer-controlled engine, but now it's not running right and gets 5 MPG and now the computer's not happy... shocking....
Thread Starter
|
New User
Joined: Jan 2017
Posts: 5
Likes: 0
Sorry it took soong for a reply i pulled the codes and came up with EGR and cylinder 1 I replaced the egr and that fixed my gas millage and I adjusted my idle Rpm and I believe that fixed my other problem
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
The EGRs in these antiques are usually an issue, mostly sticking a bit open, not sure how they cause high mileage. There are 5 EGR position sensor Codes 31 thru 35 & EGR solenoid Codes; 83 or 84.
There are no codes for cylinders in 1986, so it may be something else. Next time you are on, list your codes out here.
When you run the diagnostics and no faults are found, you will receive a Code; 11.
Last edited by vjsimone; Feb 2, 2017 at 09:23 AM. Reason: Modify text
Thread
Thread Starter
Forum
Replies
Last Post
08tolleya
1999 - 2016 Super Duty
10
Jun 16, 2009 03:33 PM
lilbilli0naire
1987 - 1996 F150 & Larger F-Series Trucks
7
Feb 13, 2008 09:12 PM
