Chrysler Repair: Chrysler LHS no spark, chrysler lhs, crank sensor

Question
We have a 94 Chrysler LHS, we were driveing and it just stopped running.  It has been sitting for about 4 months.  I ran the code and it can up 13 & 14.  We unhooked the cable on the battery and it now reads 12.  Can you please give me some sort of idea what might be wrong with the car and how to fix it?  Thanks:)

Answer
Hi Courtney,
You didn't mention how you checked for spark, and it may actually be present. I would try to sort that out first.
If you have a spare plug, then remove one of the plug connector caps on a plug installed in the engine (twist and pull on the cap, not the wire) and insert the spare plug in the cap. Then hold the cap so that the threaded shell of the spare plug is against the cylinder head and have a helper crank the engine to see if you get a spark to jump across the gap of the plug. If you do, then there is spark. If not, then I would suggest that you pull the 4 wire plug-in to the spark coil pack. Notice that one of the 4 pins in the harness side of the plug is not adjacent to either the internal nub or the external nub of the plug and that pin is supposed to be supplied with 12V when you are cranking the engine. So use either a 12V test bulb or voltmeter to observe whether you see 12V on that pin or not when cranking. If you do then you know that the autoshutdown relay is energized so that means the crank sensor needed for spark is o.k. If not, then that means the engine controller is not seeing the crank sensor to be pulsing as the engine rotates and so it has shut down the spark and the fuel pump (which is a safety measure to prevent fire). That would suggest that the crank sensor is not working. However if that were the case you should have found a code 11 (or a code 54) which tells you the crank (or cam) sensor is bad. The fact that you didn't get an 11 or a 54 suggests to me that you really should be getting spark and should get 12V on the coil pack plug.
The 13 and 14 codes are both about the manifold absolute pressure sensor (MAP) not producing a signal that is acceptable or maybe not even present. The MAP sensor is located on the rear of the intake manifold (3.3L) or the left side of the manifold (3.5L) and it is identifiable by having a three wire supply (dark green/red, black/light blue, violet/white). The dark green/red wire is the signal wire and it should vary in its voltage in the range of 4.4 to 1.6V depending upon whether the engine is at rest, being cranked, or idling. It the voltage is not in that range or doesn't vary then I would replace the sensor and see if that corrects the no start problem. The MAP is needed to set the proper mixture of fuel and air, and if it goes bad it will also prevent the engine from idling or running at all.
So those are the things I would suggest you check out. Write back with any results or further questions.
Roland