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electrical ? problems
Trying to fix that for some 5+ years, 96 Concorde LXi 3.5 L, 145 000 km, ocasionally engine stalls, needlessly checked/replaced everything except PCM (replaced PCM with factory new unit at 60 000 km - reason: cooling fans were continusly on even with A/C off) , have factory repair manual, the only code 12 (do not tell me to clean up battery terminals - done that), 3 different mechanics could not find the problem. Chrysler dealer checked for latest software - O.K. Starts up within 1/2 sec, regardless of the weather, temperature, air moisture etc. About 20 000 km ago when started up at night, the head lights went very bright than the engine stalled, shortly after that I had to replace head light bulbs - I know the alternator regulator is inside the PCM.
Question: any clues why this happens ? Or is it faulty PCM ?
Question: any clues why this happens ? Or is it faulty PCM ?
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when engine is cold and runs at idle, it usually dies after 10-15 sec. When I keep idle at about 2000 rpm for one minut (or so), sometime it "hickups" with CHECK ENGINE ligth blinks during the "hickup". When engine is warm and waiting at the red light, after some 10 sec the engine starts very light, irregular"shaking" like if some cylinder once in a few seconds did not fire, sometime it has "hickup" with CHECK ENGINE blinks during the "hickup", sometime it dies and CHECK ENGINE light comes on. Again, the only code I get is 12 (and 55, end of codes) - and the battery has not been disconnected during the last 50 start ups.
at start up - I turn the ignition key from OFF to RUN and wait, the bulbs, including CHECK ENGINE, go thru bulb test and go out, than I turn the key to START - at that time some time CHECK ENGINE light comes on again and than goes out.
Is that normal ? Why would the CHECK ENGINE light come on again during START ? I speculate this causes the code 12 to be stored - for some reason the PCM thinks the battery is/was disconnected ? BTW, after I replaced the PCM at 60 000 km (see earlier note) I had checked occasionally for codes (using "key dancing" routine) and I had no codes except 55 (no more codes). The car battery is 3 years old, I had the same symptoms with the previous battery...
Thanks for the suggestion anyway.
Could it be that BCM is toasted or having bad ground or rusty wire connections resulting in the weird behaviour and more - if the BCM communicates with the PCM confusing the PCM causing the problems I described at my first few posts ?
BTW, some time ago I greased all pins on the PCM with electrical dialectric (colorless) grease and made sure the two 40-pin connectors were seated well. The same done to all fuses and had them checked with Ohm meter before reinstalling.
Any clues ?