Chrysler Repair: 98 2.7/3.2L: code 1391, code 0356, 1998 chrysler concorde, pulley bolt

Question
I have a 1998 Chrysler Concorde that died on my wife the other day. She explain that while driving down the interstate the engine started to sputter. She then got off at the next exit where it died at the stop light. i managed to get it to start and stays running as long as I played with the gas to keep the revs up about 1800. after that it just sputters and dies. I got a trouble code P1391. You told me that there was no such code so i assumed that my Actron reader was malfunctioning and read the codes via ignition switch.  It still came up with P1391-intermittent loss of CMP or CKP but also came up with a
P0356 -ignition coil #6 Primary Circuit that my reader did not have.

Answer
Hi Andrew,
In your original message you typed 1931...so that is why I asked.
The 0356 could be one of several possibilities: the primary coil resistance of the local spark coil on cylinder #6, a wire between the coil and the pcm is intermittently open or grounded. The resistance across the two pins of the coil should be between 0.3 and 0.7 ohms. If not, then replace it. Then check the continuity between the more central pin of the plug and that of the same pin on a nearby local coil. Finally check that the outer pin of the plug is continuous to pin 4 of the plug at the pcm and that with the plug removed, and that it is not grounded. Try gently shaking all the above wires to check for intermittency. Ideally this will reveal a cause; otherwise wait until the other problem is fixed and see how the engine runs and whether the 0356 persists in which case it could be a problem with the pcm.
The 1391 says that there is an abnormal relationship between the pulse from the cam and the crankshaft position sensors. Unfortunately it doesn't say which is the fault. You could try to measure the voltage pulses of the two sensors as you turned the crank over by hand using a socket and handle on the crank shaft pulley bolt. The voltage should oscillate between 0.3 and 5 Volts several times per revolution of the crankshaft. Make the measurements between black/light blue wire and the tan/yellow wire of the cam sensor, and between the black/light blue and gray/black wire of the crank sensor, of course making the measurement with the ignition in the 'run' position. If one or the other sensor's voltage pulses do not appear to be proper then I would replace that sensor. It could be something more subtle about the sensor too, like a intermittent connection, or that the sensor is not close enough to the surface it is 'sensing',  or damage to the surface it is sensing, or damage to the pcm, or loose connectors. But I would suspect that one or the other sensor is going bad. The symptom of a failing sensor is that when it gets hot it begins to act up and when it cools down it will recover. A frankly failed cam sensor give the code 0340 while a failed crank sensor is 0320.
Sorry I can't give you a magic cure for the situation. But take a look at the resistances/continuities/voltage pulses and see what looks the most doubtful.