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You will need at least a 12 volt test light to check the cam and crankshaft sensors. If either one is bad, the auto shut down relay will not ground the PCM. Remove the 4 pin electrical connector from the coil. one of the terminals is a 5 volt feed. Connect the light to that terminal and clip the other to ground. Turn the key to the on position. the light should flash once. If it does not flash the problem is in the ASD relay or its circuit. If it flashes once, try to start the engine. (don't worry, it can't start.) See if the light flashes during cranking or not. If not, return the key to off and then disconnect the crank sensor wire connector and try again. If it flashes as you crank the engine now, then the crank sensor is bad. If it does not flash during cranking then the cam sensor is probably bad. They are both easy to access and replace. The PCM could also be bad, but the cam/crank sensors are a more common problem. A repair manual is a cheap investment and could be helpful. Good luck.
I had the same problem with my 1999 Chrysler Sebring 2.5L V6 Convertable. It started stalling at intersections; would lose RPMs' and die while driving it; and would not start unless it sat for a few minutes. Once it started, you'd have the scenario start all over again...
I hadn't kept up my maintenance schedule like I usually do, so I did the usual; I replaced my spark plugs and wires, changed the oil and filters, ect...
Finally, after it doing the same thing and wasting a ton of time and frustration on the side of the road, I took it to a mechanic that put it on his $9,000 diagnostic machine. The verdict; CRANK SHAFT POSITION SENSOR!
The Haynes Manual will tell you wrong on its location for the 1999 Lxi 2.5L V6 convertable; it is NOT LOCATED BEHIND THE BATTERY TRAY. The crankshaft position sensor is actually located about 4 to 6 inches below the distributor, which is about dead center of the motor, on the transaxle housing.
You do have to take off the tire and the skirt cover to get to it. I had to purchase two long socket extensions just to get to the bolt that mounts the sensor to the transaxle housing; but it was well worth the 20 bucks...
All in all, it took me three hours to find the damn thing, and then to figure out what I needed to take the old one off and get the new one installed.
The $65 dollars that I spent to find out what the problem was is worth it....
to reset the computer simply unplug the battery for about 30 minutes.
However, you have a different problem I believe. you need to check your plugs and wires/coil packs. A fouled spark plug will cause rough running at any speed.
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