Where do i go next?
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Joined: Aug 2009
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Where do i go next?
I have a 1996 f150 4.9L truck. it has ignition problems, where it will crank and crank but wont turn over only sometimes. Other times itll start right up....it has no spark when it doesnt start. It seems to be like the fuel pump kicks on if i leave the key turned then it starts right up, but it DEFINATELY has no spark. Also, i was testing power to the coil...had someone try turning it over....when they let go of the key it started sparking and i got bit...lol. here is what ive done to it, auto parts store loves me 
ICM
PCM
full tune up
FPR
new distributor (pip sensor included)
all new relays
new ground cable from battery since the old one snapped in my hand
checked the ignition switch (no high resistance)
Thats all i can think of atm, if i remember more ill post....Im thinking maybe a wire shorting to ground somewhere? Help! lol
ICM
PCM
full tune up
FPR
new distributor (pip sensor included)
all new relays
new ground cable from battery since the old one snapped in my hand
checked the ignition switch (no high resistance)
Thats all i can think of atm, if i remember more ill post....Im thinking maybe a wire shorting to ground somewhere? Help! lol
Senior User
Joined: Sep 2009
Posts: 228
Likes: 0
I have a 1996 f150 4.9L truck. it has ignition problems, where it will crank and crank but wont turn over only sometimes. Other times itll start right up....it has no spark when it doesnt start. It seems to be like the fuel pump kicks on if i leave the key turned then it starts right up, but it DEFINATELY has no spark. Also, i was testing power to the coil...had someone try turning it over....when they let go of the key it started sparking and i got bit...lol. here is what ive done to it, auto parts store loves me
ICM
PCM
full tune up
FPR
new distributor (pip sensor included)
all new relays
new ground cable from battery since the old one snapped in my hand
checked the ignition switch (no high resistance)
Thats all i can think of atm, if i remember more ill post....Im thinking maybe a wire shorting to ground somewhere? Help! lol
ICM
PCM
full tune up
FPR
new distributor (pip sensor included)
all new relays
new ground cable from battery since the old one snapped in my hand
checked the ignition switch (no high resistance)
Thats all i can think of atm, if i remember more ill post....Im thinking maybe a wire shorting to ground somewhere? Help! lol
does this mean sometimes it wont turn over or does it mean sometimes it turns over but doesnt start?
Senior User
Joined: Sep 2009
Posts: 228
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you checked the ignition switch resistance...hmm. im thinking i would replace that as well. its only a few more bucks and that is exactly what the problem was with the last guy who had that problem of intermittent no starts.
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I was reading something, can a bad ignition switch really cause the radio to cut out when you hit a bump?
Also i forgot to mention if you leave the key to the on position, you can hear the pump kick on/off/on/off....but it aint the pump cause it does it on both tanks
Also i forgot to mention if you leave the key to the on position, you can hear the pump kick on/off/on/off....but it aint the pump cause it does it on both tanks
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Senior User
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Well theres no spark, and the pump does turn on/kick off when i first turn the key.....however like i said after a bit of sitting there the pump will kick on and off....also when it does that the check engine light goes out when pump turns on, and comes back when pump turns off.
Weird huh? Possible ignition switch?
Weird huh? Possible ignition switch?
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Joined: Jul 2008
Posts: 58
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From: Prince George, BC
Seems the same information is found within this forum as well. So that should be it
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Well, what im saying BOTH the distributor and crankshaft sensor is brand new, engine speed=crank sensor i believe.....maybe ill tell the auto parts store the dist was defective and try to eliminate that? lol
I also forgot to mention the truck stalls sometimes, also sometimes it shakes likes its gonna shut off...anyone ever stalled a standard knows what i mean...then itll catch itself...thats when it threw the code
I also forgot to mention the truck stalls sometimes, also sometimes it shakes likes its gonna shut off...anyone ever stalled a standard knows what i mean...then itll catch itself...thats when it threw the code
