96 F150 5.0 Ignition problem, please help...
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96 F150 5.0 Ignition problem, please help...
Hey guys, 2 days ago while slowing down to a stop my engine just cut off with no stutter at all. I 1st depressed the shrader valve on the fuel rail to check and make sure I had fuel present, and I did. I then tested for spark, and had none, so I went and got an ignition coil and ICM and still nothing. Had my truck towed home and after viewing similar threads on here and going through all the test in the Hayes manual I concluded that the PIP in the distributor was bad and replaced the distributor. After hooking everything back up the engine would not fire at all, I took the old ICM and hooked it up momentarily and it fired and sputtered for about 10 seconds, and since it will do nothing. One question I have is if the PCM is bad would I still be able to use my ODB2 scanner to read information? My thoughts are, that the PCM is ok if the scanner will access it. Any help to point me in the right direction will be greatly appreciated!
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
Hey guys, 2 days ago while slowing down to a stop my engine just cut off with no stutter at all. I 1st depressed the shrader valve on the fuel rail to check and make sure I had fuel present, and I did. I then tested for spark, and had none, so I went and got an ignition coil and ICM and still nothing. Had my truck towed home and after viewing similar threads on here and going through all the test in the Hayes manual I concluded that the PIP in the distributor was bad and replaced the distributor. After hooking everything back up the engine would not fire at all, I took the old ICM and hooked it up momentarily and it fired and sputtered for about 10 seconds, and since it will do nothing. One question I have is if the PCM is bad would I still be able to use my ODB2 scanner to read information? My thoughts are, that the PCM is ok if the scanner will access it. Any help to point me in the right direction will be greatly appreciated!
Do you hear the fuel pump run for second or two every time the key is turned to "run"?
Little fuel spurting out depressed the shrader valve isn't proof there is proper fuel pressure, proof positive the pump did run. Ambient air temperature changes could create little bit of pressure in the system where there isn't any created by the pump for example, enough spurt some out.
It might respond to a scantool it might not, doing so wouldn't necessary equate to it's being "good" either though. Not a definitive test method no.
Pull it out remove its cover, give it a good looking over. It might not have obvious signs it's bad just by looking at it, then again it is possible it might too.
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