Question about Dodge Ram 1500
It would help to know what the year and engine is, but I'm gonna throw this out there anyway. Watch your tach, if you have one, while cranking the engine. If it stays dead on zero, the most likely cause is the crankshaft position sensor. It's located on the bell housing behind the passenger side cylinder head. You can use either a regular socket or a hex key socket to get it off. I don't remember what sizes though and it's such a ***** to get to you'll swear I'm lying. I've replaced a handful of them myself for the same thing. This applies 94 (I think) and up 3.9, 5.2 and 5.9 gas engines)
Posted on Apr 13, 2009
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Posted on Jan 02, 2017
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Jan 26, 2017 | 2003 Chevrolet Blazer
Inspect the EIS towers and plug the wire connections for corrosion or other signs of poor retention at connections.
The electronic ignition (EI) module supplies a signal to the PCM whenever it determines that the #4 cylinder fired on its compression stroke. Because of opposite coil tower polarity, the simultaneous fir of #1 and #4 cylinders are of opposite polarity as well. Under most conditions, except decel, the waste spark cylinder fires before the compression cylinder in sequence. The EI module can determine this polarity sequence and voltage amplitude by using capacitive pickup plates located under the 1/4 coil. If the module senses a positive to negative sequence and high negative spike when #4 is on TDC, it pulls the PCM cam signal to ground signaling that #4 has just fired on compression. This signal along with the double pulse received from the CKP sensor, synchronizes spark and fuel timing.
Beside plugs , plug wires need to be replaced as well !
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