2001 ram van 1500 3.9l crank no start??
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Pulsing doesn't necessarily mean pulsing correctly. The pulse could be delayed or not long enough, resulting in a mis-timed or weak spark, if a spark happens at all. Based on all of your troubleshooting and assuming the wiring is okay, it sounds like you're down to a bad crank sensor or PCM.
#13
Pulsing doesn't necessarily mean pulsing correctly. The pulse could be delayed or not long enough, resulting in a mis-timed or weak spark, if a spark happens at all. Based on all of your troubleshooting and assuming the wiring is okay, it sounds like you're down to a bad crank sensor or PCM.
#14
I would think if it was actually firing the coil, you would at least get a backfire if it wasn't timed properly.
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a108 (02-05-2024)
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this is not my area of expertise, this is why I’m asking but I do know for a fact that There are actually several for that circuit. Now maybe they don’t apply to a certain type of sensor failure, but they do exist. for example, I know it’s not a dodge, but when the one in my wife’s Audi failed it set a code for cps signal being out of range.
Not that it matters because I just looked at the signal on a scope and it’s within spec….
P0335 Crankshaft Position Sensor A Circuit Malfunction
P0336 Crankshaft Position Sensor A Circuit Range/Performance
P0337 Crankshaft Position Sensor A Circuit Low Input
P0338 Crankshaft Position Sensor A Circuit High Input
P0339 Crankshaft Position Sensor A Circuit Intermittent
Not that it matters because I just looked at the signal on a scope and it’s within spec….
P0335 Crankshaft Position Sensor A Circuit Malfunction
P0336 Crankshaft Position Sensor A Circuit Range/Performance
P0337 Crankshaft Position Sensor A Circuit Low Input
P0338 Crankshaft Position Sensor A Circuit High Input
P0339 Crankshaft Position Sensor A Circuit Intermittent
#17
Yesterday my buddy let me borrow his scope and it appears cam and crank sensors are putting out proper signal. After conferring with a friend of mine who teaches automotive electronics at the local trade school he said based on the info I provided it does appear to point to a pcm problem. I went ahead and ordered a new pcm this morning. I’ll check back in here with the results thanks for the help!
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