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  #11  
Old 07-12-2013, 06:17 PM
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sinfulrelations sinfulrelations is offline
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I did get a new pickup coil and it was a no go, where would I connect the grouand on the coil
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  #12  
Old 07-15-2013, 12:24 PM
90Ram4x4 90Ram4x4 is offline
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Default Had the Same Problem

Checked everything, replaced the distributor, nothing showed up on the code reader the Mech. brought over from his shop. put a new coil in on his advice.
even pulled out the safety switch from the tranny that keeps it from turning over & starting while in gear, LOL. Brought that into the dealer & showed the Mechanic, he shook his head, told me to try everything I just did, then said "It's probably the Computer. you can have it sent in to have it checked for $350, or just get a new aftermarket one for $110 and try it. Sure enough that was it.
Fired up like a champ really easy install took 5 Mins. literally. There's no codes or anything that shows up on an analyzer when the computer goes bad. LOL
before this happened my starter went & shorted out & I think that's what must've popped the CPU. you might check the starter as well, when I'd turn the key it would crank for 1/2 a second then ALL the electrical's would go out.
Grease got in it somehow & created a string of carbon & grease between the brushes, that shorted it out.

Good luck, hope this helps
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  #13  
Old 07-19-2013, 08:56 AM
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sinfulrelations sinfulrelations is offline
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I put in a new pcm but still no fire... now I'm at a total loss
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  #14  
Old 07-19-2013, 03:49 PM
Gen1dak Gen1dak is offline
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How much power in volts are you getting to the positive side of the coil input? ASD could be failing. You need to do a cranking test. You should see battery voltage at the coil, meaning at least 12.4 volts. According to the FSM, this is the case for fuel pump, fuel injectors, ignition coil, and O2 sensor heater element. The PCM provides 8 volts to the camshaft position sensor, and 5 volts to MAP and TPS. Monitor the positive lead of the coil while attempting to start for 5 seconds. Watch what the voltage indicates. It will do one of three things. It will either (1)remain near zero the whole time, (2)will be near 12 volts initially, then drop after 1-2 seconds, or (3)will remain around 12 volts the entire time. That result will determine further actions.
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Old 07-19-2013, 04:00 PM
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I'm getting 5.56 volts at the coil
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  #16  
Old 07-19-2013, 05:33 PM
Gen1dak Gen1dak is offline
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Since you just changed PCM, the only thing between the coil and the PCM is the ASD. Now, the ASD also supplies power to the fuel system. I know you said you had good fuel pressure, but I'm thinking that even at 5 volts, a fuel pump could build up pressure to the limits of the fuel pressure regulator since the engine is not consuming any fuel. Of the three conditions I'd listed, the two you don't have lists the PCM, PCM circuit, or the 60-pin connector. Only the constantly low voltage lists PCM or ASD. Since the PCM energizes the ASD (either on or off, not variable voltage), well, that'd have me changing the ASD. Always possible it could be something else, but at this point I'm at a loss if it is. ASD's don't fail often, and can be tricky to diagnose, but that's where I am at this point.

Last edited by Gen1dak; 07-19-2013 at 06:07 PM.
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  #17  
Old 07-19-2013, 05:53 PM
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The asd is just the relay in the pdc right? Or is there a seperate box that controlls stuff
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  #18  
Old 07-19-2013, 06:06 PM
Gen1dak Gen1dak is offline
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Correct. It is in the PDC.
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  #19  
Old 07-19-2013, 06:21 PM
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Ok, I tested the relay And its working like it should and I'm getting the correct voltage to it +12.6
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  #20  
Old 07-19-2013, 10:28 PM
Gen1dak Gen1dak is offline
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Right, 12.6v IN, but is it sending 12.6v OUT? If you're only getting 5 at the coil, there's a drain somewhere.
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