Question about 1990 Ford F150

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1990 F150 has no power to accerate.

1990 F150 5spd man. EFI 4.9l six cylinder. Truck starts fine but when trying to accelerate has no power like its starving for fuel. Could this be the throttle position sensor not working? I've already changed the fuel filter and put new plugs in.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

fknstart
  • 404 Answers

SOURCE: truck spits and sputters when warmed up

do a compression test

Posted on Jan 05, 2009

c17hydro
  • 2984 Answers

SOURCE: MAP sensor / does a 2006 f150 have one? and if it

Bad MAP sensor....located on your intake manifold....one connector...1 o-ring

Posted on Mar 04, 2009

wyatt1582
  • 453 Answers

SOURCE: 1988 ford f150 running rough

Might want to change o2 sensor's, If they are not sending the right single its tell the computer to dump fuel. 1988 was using a fuel density system.
(1989 came out with Mass air flow system)
Check this
I think it might have a TFI module that's not working right. Located under distributor. Its gray and about 4" long and if equip, you need a 4 or 5.5 mm tool to unbolt it. This was a common thing back in the 80's. Its been so long I can't remember if the 4.9 straight 6 had it or not.
T- Thick
F- Film
I- Ignition module

Posted on Apr 24, 2009

  • 5 Answers

SOURCE: 1987 F150 rough idle, stalls, smells rich

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Posted on Jun 02, 2009

  • 532 Answers

SOURCE: My 1996 Ford F150 4.9l 5spd. rough idle, poor drivability, stall

try replacing the throttle position sensor

Posted on Oct 24, 2009

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1 Answer

Why does't my 87 F150 pickup start?


Have you checked for spark?? Have you checked to see if it is getting fuel?? If you are not getting fuel, check for power at the fuel pump. If you are not getting power at the fuel pump the emerita switch is probably the problem.

Aug 15, 2014 | Cars & Trucks

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My 1990 f150 truck wont start, its making a popping noise


If it sounds like backfiring you may have some spark plug wires mixed up.Also you may want to check the compression in the engine cylinders.

Feb 09, 2010 | 1990 Ford F150

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1990 FORD F150 IGNITION SWITCH PROBLEM


You may need a new steering column or your ignition lock cylinder might be bad

Aug 12, 2009 | 1990 Ford F150

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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

1 Answer

Truck runs rough


Sounds like one of your chambers isn't firing. Run your car for a few minutes, shut it off then pull your plugs one at a time and see if one of them is wet. Might just need a new plug.

Nov 28, 2008 | 1990 Ford F150

1 Answer

Power


How long have you had the F-150? Has it always seemed to be short on power, or is this something new? I suspect it's the engine (need for 2 more cylinders!) I have a 90 F-250, 5.8 V-8, and I think it's lacking power if I tow or put anything in the bed. Fine when it's empty! 5th gear sounds normal, it's really only meant for cruising on the highway, and flat at that. Maybe we should compare gas bills, you might like that 6 cyl a little more. countrycurt0

Aug 22, 2008 | 1990 Ford F150

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