Question about 1991 Ford F150

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Rpms ford 4 x 4 F-150 1991. The rpms jumps from 1000 - 3000 or it dies do you have any idea what my problem is. Elias

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Sounds like the throttle position sensor.

Posted on Nov 02, 2008


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3 Answers

I have a Ford 1990 f250 xlt 7.5 When starting revs up and down slowly then dies sometimes, why?


Clean the throttle body and idle air control motor(IAC) on the side of it. Mostly the IAC and the hole it sets in. Also check the air filter.

Apr 26, 2015 | 1990 Ford F250

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Have changed battery alternator, regulator silinoid and still will not stay running. can jump off and will run for about 10 - 15 min and then die, and will not restart without a jump please help do not...


Make?

Model?

Year?

check with voltmeter to see if you have 12 volts at battery with engine off.

check for 14 1/2 volts with engine running at1500 rpms.

Report results

Jul 29, 2011 | Ford Mustang Cars & Trucks

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II have a 1989 F250 with a 460 gas motor, it starts but after 1


Fuel pressure regulator/fuel pump most likely.

Apr 18, 2010 | 1988 Ford F 250

1 Answer

Car cuts out rpms jump around feels like out of gas then dies?


Wow, you've thrown a lot into your paragraph (rpms, going up hills, chugs, dies, when it warms up, when the A/C has been on, etc). With that said, I'll try to help you with what i know and what you said, and provide you with supporting diagnostic articles.

For the engine's cutting in rpms, incremental loss of power, see this handy diagnostic article that provides you with a list and explanation of the most probable causes:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Power_Less_Than_Expected_Normal.htm

When the car dies when it is warm and the A/C has been on, review these articles that specifically address such circumstances:

http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Stalls_When_Hot.htm


http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Engine_System_Engine_Stalls_When_AC_Turned_On.htm


Good luck!
Brad

Jun 08, 2009 | 2004 Oldsmobile Alero

1 Answer

Engine jumps/RPMs rise or lower when stopped (with brake).


check the vacuum hose first and if it's been over 30,000 miles and you havn't had a transmission service it is a good idea to have that done

Dec 25, 2008 | 2003 Ford Ranger Regular Cab

1 Answer

High rpms and then dies


check for loose vacuum lines or check to see if there cracks on them. you sound like you have a vacuum leak as well as your Idle Air Control Valve(IAC) going bad. good luck and happy holiday

Dec 22, 2008 | 1987 Honda Accord

1 Answer

Car just started dying


You may have a bad alternator causing the entire vehicle to run off of the battery and not recharging it. Simple test, have it running and momentarily disconnect the battery cable, ither positive or negitive, and if the car dies as soon as you lift the cable, it's not charging. remove your alternator, and visit a local advance auto or autozone with it, and they can test it for free. Also check your fuses and fusable links, as one of them may have been blown.
Good luck!

Dec 17, 2008 | 1995 Ford Probe

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