Question about 1988 Ford F 150
I have an 88F150 with 140K miles, dual tanks 4.9L 6cyl
When I am just cruising at speed, the truck sputters, and jerks, almost like having water in the gas. Under acceleration there is no issue, and the problem is lessened if I downshift.
Have replaced distributor cap and wires but no improvement.
I am thinking possible fuel pump?- but not sure if it is a problem in the tanks or the engine. I do have trouble with the fuel guage.
Test the fuel pressure, at idle it should be around 40-44 PSI, when u jab the throttle it should go up a few pounds, but never down, if it drops u have either a clogged fuel filter or a failing fuel pump, the filter is on the frame rail driver side, the pump is inside the fuel tank, if the pump is the problem replace the filter as well, the best price for this pump or the entire pump module is a site called http://www.rockauto.com/catalog/raframecatalog.php, used them for years, call around u will see what I mean about the price.
Posted on Feb 10, 2009
Could possible be a bad fuel pump or a bad fules filter a dirty fuel filter can cause the same effects as a quick solution try running vehicle with dry gas when u get down to a quater tank should evaperate any water and also replace that fuel filter before a good fuel pump goes bad and will cost you alot more than a filter
Posted on Feb 10, 2009
YOUR THROTTLE POSITION SENSOR MAY BE BAD IN ONE SPOT .TAKE OFF THE WIRE CONNECTOR AND CHECK WITH ANALOG OHMMETER OPERATING THE THROTTLE LEVER VERY SLOWLY AND THE NEEDLE WILL DROP WHEN OPEN CIRCUIT OCCURES.
Posted on Jan 24, 2010
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Mar 21, 2015 | 2004 Dodge Caravan
Dec 07, 2010 | 1992 Subaru SVX
Sep 20, 2010 | 1998 Plymouth Breeze
Dec 18, 2009 | 2001 Saturn S-Series
Sep 30, 2009 | 2002 Mercury Sable
Jul 27, 2009 | 1998 Chevrolet Astro
Sep 12, 2008 | Mitsubishi Eclipse Cars & Trucks
Jul 11, 2008 | 1996 Dodge Caravan
234 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: