Chrysler Repair: engine misses, shaft sensors, roland roland

Question
Answer -
Hi Phil,
The two sensors share one thing in common, the ground wire. Why not check to make sure that the ground (black/dark green) wire at the plug for both sensors is properly connected electrically (measure with an ohmmeter) to pin 43 at the pcm? Otherwise, because you had to disturb both of the sensors to do the corrective actions you recently took, I would look over all the details surrounding the electrical, vacuum, mechanical aspects of those two sensors.
Then erase the codes (disconnect the battery supply for a few minutes), then verify that there are no codes, and then drive it for a while and see how it is running. It is possible that both sensors have "gone south", but it seems unlikely.
Roland

Roland,

I checked the wires, they seemed fine.  I cleared the pcm, drove it around for awhile and the lights came on.  Went back to autozone and had them re-read the codes.

P0305 - miss on cyl 5
P0302 - miss on cyl 2
P0305 - miss on cyl 5
P0300 - miss on multiple cyls

I think that the map and iat codes were set last Friday when I disconnected the leads while the engine was running to see what effect it would have (if no effect it would pinpoint the problem).  I would not have expected the error codes to report "higher than expected voltage" from a disconnected lead (I call that bad programming!)

So, we're back to the same codes, only occuring when the engine is warm (Not from a cold start in the mornings) and not at high RPMs.  Worse misses are between idle and 3000 rpms.

sigh...

Answer
Hi Phil,
The trouble shooting manual lists the following possibilities for these codes
secondary igniton wires, fuel pump or filter, injector harness connectors, ignition coil circuit, spark plugs, mechanical engine problem, contaminated fuel, PCM power ground, injectors, restricted exhaust,intake restriction, PCM,evap system, air gap at high rpm (with reference to the crank and cam shaft sensors), damaged trigger wheel (with reference to the what the sensor are "looking" at.
One other possibility is to test the car without the A/C running (if you haven't already done that) because an oscillation of the compressor can manifest itself with the misfire code.
So the manual is not very helpful with general misfires, except to go thru the entire engine in the logical manner.
I wish I had a magic bullet for you that would find the problem. You might want to go to a dealer with a good tune up mechanic and a Chrysler Diagnostic Readout Box III to see if he can pinpoint the cause. When all else fails, such an individual can prove helpful.
Roland