changed pcm o 1998 lincoln towm car -- won,t start

50

Asked by Oct 14, 2015 at 10:34 AM about the 1998 Lincoln Town Car

Question type: Maintenance & Repair

before   showed no power to 1 , 2 , 3 , & 7 cyl.   changed all coils  %  all plugs online replacement pcm pre-flashed from  flagship one     was running on other 4 cyl  prior to work    turns over strong now but won,t start ???

7 Answers

83,115

I do hope that the battery was disconnected before you put in the replacement ECM. Does the check engine light come on for a few seconds then go off if the key is turned to just the on position?

1 out of 1 people think this is helpful.
Best Answer
50

battery unhooked both post ck engine light comes on and stays with ign in on position

1 out of 1 people think this is helpful.
83,115

Then you have a hard failure somewhere, you need a code checker with "live data" capabilities so you can see if the ECM is even sending or receiving signals.

1 out of 1 people think this is helpful.
50

do key fobs have to be reprogramed with pcm change ???

2 out of 2 people think this is helpful.
50

what could prevent this pcm from transmitting signals ???

2 out of 2 people think this is helpful.
83,115

I believe that on that year the module is separate and located in the trunk under the rear package shelf. As long as the security light turns off you should be fine.

1 out of 1 people think this is helpful.
83,115

Bad power supply or bad ground pathways, could even be the ECM itself. Live Data will be able to see that.

1 out of 1 people think this is helpful.

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