Question about 1990 Ford F150

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How to check for a stuck valve on my 1990 Ford f-150 5.0 fuel injected?

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  • dreamseason4 Jun 12, 2009

    Checked dry and wet test. Was at first 0 pressure then after adding oil it went to 30 lbs. Everyonw wants 1,000.00 to fix but I found a used motor on line for 745.00 with 60,000 miles and a three year warranty?? Any suggestions???

  • Dale Long May 11, 2010

    pull the valve covers off and check it.

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  • 54 Answers

Easiest way is to do a compression check on that cyl. If its stuck open it should read close to zero psi.

Posted on May 21, 2009

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Fuel pump continues to try to function when truck key is off.while key is off if i switch to opposite tank that pump starts to function even w/key off


fuel pump is going bad. or your pressure return is stuck. or your relay to the fuel pump is sticking .plugged fuel filter. bad ground to the pump. that is all i can think of besides a faulty key switch.but most likely its a pressure issue fuel injection needs a certain amount of pressure to fire the injector so when you change tanks the pump has a pressure change so the pump starts to keep up pressure. hope it helps

Dec 27, 2012 | 1990 Ford F150

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check that the egr valve is not stuck open remove it and cover the hole on the intake side and see if it goes away or with engine running remove the vac line from the valve and install a short length of hose and suck on the hose to draw a vac on the valve it only takes 3-5 inches of vac to open it the engine should stall or run even worse if it is not stuck and if it was stuck open you didnt change anything

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Failed OBDII Diagnstic trouble codes P0761 and O1744 What does this mean?


code P0761-
Possible causes - Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 3 valve
- Shift solenoid 3 valve harness or connectors
- Shift solenoid 3 valve circuit is open or shorted
P0761 FORD Description Shift solenoid valve 3 is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position. When is the code detected? The P0761 code is detected when the ECM has detected a mechanical fault with the solenoid energized, valve stuck off code O1744- is not a code these are the ones I have found that come close
P0174 1999 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2000 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2001 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2002 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 2003 FORD WINDSTAR Fuel Injection System Too Lean Bank 2 P0174 FORD Fuel Injection System Too Lean Bank 2

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1 Answer

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Is the spark plugs getting spark? Is it getting fuel?

Apr 17, 2010 | 1990 Ford F150

2 Answers

Fuel smell in 2005 , f-150 just when I stop at a stop light, cannot smell when driving. Very heavy fuel smell.


If it is fuel injected, I would inspect the injection system. I had an injector that was leaking an puddling gas on the valve cover area. If not that, then generally check around for a leak in the fuel system / tank.

Mar 11, 2010 | 1989 Ford F 150

1 Answer

'90 F-150 with 5.8 engine acting like no fuel to keep engine running. have replaced distributor cap and double checked the fuel shut off valve located underneath the foot petal and still acts like not not...


check you fuel pressure at the fuel rail, if you have pressure (witch i doubt) then look at injectors, otherwise start with the cheap stuff and work up to others, start with a fuel filter and if that dont help look at a in tank pump or the high pressure pump.

Jan 25, 2010 | 1990 Ford F150

2 Answers

Ford f 150 won't start


u most likely fried the fuel injection computer.

Oct 30, 2009 | 1990 Ford F150

1 Answer

Not getting fuel to injecters


you have a tank switching valve under the truck that may be bad,also check the fuel lines coming out of the tank they could be cracked and sucking air instead of fuel

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1 Answer

88 ford f150 inline 6 wont start...


check to see that you have fuel all the way to the engine.to do this: pull the fuel pump fuse and, crank the engine a few times to releive pressure then open the fuel line, cover it with a rag for safety then: replace the fuse and, crank the engine just for a second or, two if no fuel comes out it's another fuel filter probably on the truck frame rail that is the problem or, low pressure from the fuel pump

Apr 21, 2009 | 1988 Ford F 150

2 Answers

The truck died,it will fire then dies,its a 1990 with a 351 fuel injection.the fuel pump is working,changed the filter,there is fuel in the line for the injectors


check to see if you have a flapper valve that operates your feul injection if you do you might have to replace it.

Aug 11, 2008 | 1990 Ford F150

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