Chrysler Repair: primary circuit, 1994 chrysler lhs, chrysler lhs

Question
Hello Roland i have a 1994 chrysler lhs eng 3.5. I'm getting a trouble code 43.which is peak primary circuit current not acheieved with the maximum dwell time. I've changed the ing.coil but that didn't work i also changed the pcm.. and the cam position sensor. and it is still not solving the problem. The car doesn't start acting up until it gets warm. it starts to buck when it is warm and the cruise light blinks on and off and the check engine light does to. But eventually the check engine light stays on. Do you know what the problem could be?

Answer
Hi Mark,
I am not fully knowledgeable about the 3.5L engine's control system (no wiring diagrams, but I am getting the Haynes manual in a few days and it may have some circuitry, though I can't be sure of that until it arrives). I think the primary circuit is pretty simple and that you have dealt with the two major components already (the pcm and the coil pack). That leaves only the interconnecting wires which is probably what you should inspect next. I think all the wires (3 or 4) at the coil go to the PCM ( as they do on the 3.3 and 3.8L engines). The 12v power comes in on the dark green/orange from pin 57 of the pcm, and the 3 driver wires are dark blue/yellow to pin 17, red/yellow to pin 18, and black/gray to pin 19 (although the wires don't reach the pcm with those colors  because of a change-over at a 10- pin connnector behind the battery. To identify the pins, as viewed from the pin side of the 60-way plug, hold the plug with the short tap up and start counting at #1 from left to right on the top row. So see if all those wires are solidly connected from the coil plug to the pcm plug. All this assumes the 3.5 has the same plug assignments as the 3.3 and 3.8.
My only other thought is that perhaps the engine temp sensor is worn out and not reading the temp accurately. If you pull its plug you should find it reading 7 to 13K ohms at 70F and 700 to 1,000 ohms when at 200F. It is probably located near the thermostat housing and likely has black/light blue and tan/black wires.
One last possibility is the autoshutdown relay is flakey which is causing an unstable 12v supply to the coil. That could be checked by monitoring the dark orange/green wire at the coil, or simply replace the asd relay which is not too expensive, I suspect.
I am sorry to not be truly expert on the code 43 for your engine, but these seem to be the possibilities as described for the later smaller engines for which I do have a trouble shooting manual.
You also might try shaking the wires that run between the pcm and coil to see if you can replicate the problem.
If I have been of help let me know what it was that was useful; if not and you get to the bottom of it let me know what is was.
Roland