Question about 1991 Ford F150

1 Answer

Haven't been a big fan of Ford lately....The vehicle in question is a 1991 ford F-150,4.9 liter. It will start and run excellent for up to 10 minutes....then dies and will not restart until it sits for several hours,then it repeats the process. I've changed both has new plugs and wires,new distributor(that I'm starting to suspect is bad) new fuel pump...clean filter...and a new EEC computer. my distributor module was new also,but i have noticed burn pits on it. I can't seem to find a short in the harness...the truck is on my last nerve and ready for the scrap yard to increase my satisfaction,lol Any help would be appreciated. Thanks, Shane in SC

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 1,068 Answers

Well i really would investgate the burn marks more but if it only starts dead cold then i would be thinking what changes when it gets warm and stops it from starting and running after warm. seeing you replaced all of that stuff doesn't rule them out and a dist. maybe not the issue but a module may. it also may have something to do with the temp sensor. it could be broke and telling the eec unit to rich the fuel up like a choke and not leaning it out when it gets warm because the sensor is still telling it is cold. just a few quick thoughts.

let me know any more info that could help.

Posted on Dec 12, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Can I put a 1981 ford f-150 motor in a 1991 ford f-150 truck

Sounds to me like you opened a can of worms that you are not equipped/qualified to deal with. To begin with, doing an engine change the way you did it is illegal. It is OK to put the newer motor in the older vehicle, but it is against federal law to put the older engine into the newer vehicle. REFERENCE: EPA ENGINE SWAP FACT SHEET

With all that said, if you want to do a swap like that, it is necessary to also swap wiring harnesses and computer modules (among several other components) if you expect it to work.

Mar 17, 2012 | 1991 Ford F150

1 Answer

Would the firing order be the same on a 98 ford 150?

Hi Joann:
About what engine sizes...

Ford Truck F 150 4.9 liter L6 VIN "Z"
Ford Truck F 150 5.0 liter V-8 VIN "N"
Ford Truck F 150 5.8 liter V-8 VIN "H"
Ford Truck F 150 5.8 liter V-8 VIN "H" Lightning

Confirm us.

Dec 26, 2011 | 1993 Ford F150 SuperCab

2 Answers

I need to know the firing order in my 1991 ford 150 engine size 305

1991 Ford F 150 2WD Pickup
4.9 liter L6 VIN "Y" 92714689.gif

Jan 19, 2011 | 1991 Ford F150

1 Answer

I have a 2004 f-150 5.4 liter with 100,000 niles

When was the last tune-up?

Inspect few plugs for carbon ash (lean running) or wet (rich running).

Clean Mass Air Flow sensor with CRC Mass Air Flow Sensor cleaner

Change air filter

Change PCV valve (under $10 item)

Ran a tank of Chevron gas with LUCAS fuel system cleaner additive.

Inspect for vacuum leak.
Start from the brake booster (round metal drum) and work you way outward.

Jan 27, 2010 | 2004 Ford F150

5 Answers

What is the firing order for a 1996 ford F 150

1996 Ford F 150 2WD Pickup
4.9 liter L6

1996 Ford F 150 2WD Pickup
5.0 liter V-8
1996 Ford F 150 2WD Pickup
5.8 liter V-8

Jan 25, 2010 | 1996 Ford F150 Regular Cab

2 Answers

I need electriacal diagram for a ford f 150

They have wiring diagrams in Haynes or Chilton manuals.

Jul 16, 2009 | 1991 Ford F150

1 Answer

My 1990 Ford F-150 suddenly quit running

Look under the dash, against the firewall. there is a little box. on the top of this box is a little button press the button for 10 seconds with the vehicle in the on position but not running position. That was the problem on my 1991 f-150, it is the first inertia switch. It is a safety shutoff incase the vehicle is in an accident or rolls, but a simple hit by the foot can trigger it.

Jun 15, 2009 | 1990 Ford F150

1 Answer

It uses too much fuel. 2,6 liter per 10 km.

You need to replace the sensors,,Throttle PositioningSensor, OXYGEN sensors, Mass Air Flow. after which your truck will run nicer and use less fuel.

Jan 16, 2009 | 1990 Ford F150

2 Answers

Ford f-150 will not start

I have a 1991 Ford f-150 , I change the battery and started haveing trouble, the engine rotates but will not start. I put a litter gasoline on the throttle body and will start. Ish Gonzales

Dec 29, 2008 | 2002 Ford F150 Regular Cab

Not finding what you are looking for?
1991 Ford F150 Logo

214 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

83772 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22413 Answers

gerry bissi

Level 3 Expert

4387 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides