F-150

Tiny
STEVE CARL
  • MEMBER
  • 1999 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
1999 f-150 won't start some times
Sometimes it will run really rough then die
Sometimes it won't start at all.
I may need to turn it off and restart several times before it runs correctly.
When it runs it runs great.
Can go for a week or two without any problem.
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Wednesday, January 19th, 2011 AT 1:57 AM

3 Replies

Tiny
RASMATAZ
  • MEMBER
Check the fuel pressure-if ok, clean out the idle air control valve and EGR valve and clean the MAF sensor with a electronic cleaner-CRC.
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Wednesday, January 19th, 2011 AT 9:07 AM
Tiny
STEVE CARL
  • MEMBER
It seems like it's an electronic problem.
It goes from running perfict to not being able to start.
Like there is not spark or fuel at all.
After I turn it on and off a few time it will finaly start and run like new.
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Wednesday, January 19th, 2011 AT 8:47 PM
Tiny
RASMATAZ
  • MEMBER
Next time it refuses to start don't wait for it to make up its mind-do below immediately to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
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Wednesday, January 19th, 2011 AT 10:47 PM

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