Dman27 Posted March 8, 2011 Share Posted March 8, 2011 my 95 ls 400 is cranking full force no spark getting fuel scanner cant establish a connection fuses appear fine used scanner with success day before problem was driving fine. 175000 tbelt is intact any suggestions Quote Link to comment Share on other sites More sharing options...
curiousB Posted March 8, 2011 Share Posted March 8, 2011 I doubt ECU instantly failed. I'd rule out other things first. Double check fuses. Get a wiring diagram and probe power lines at the ecu. Check crank position sensor. Look for firing primary on coils..... Quote Link to comment Share on other sites More sharing options...
Dman27 Posted March 8, 2011 Author Share Posted March 8, 2011 I doubt ECU instantly failed. I'd rule out other things first. Double check fuses. Get a wiring diagram and probe power lines at the ecu. Check crank position sensor. Look for firing primary on coils..... Quote Link to comment Share on other sites More sharing options...
Dman27 Posted March 8, 2011 Author Share Posted March 8, 2011 Neither Coil is firing. Why would I not get a connection to code reader all of a sudden Quote Link to comment Share on other sites More sharing options...
Dman27 Posted March 9, 2011 Author Share Posted March 9, 2011 How dO I check crank sensor? Any other ideas. Double checked fuses Quote Link to comment Share on other sites More sharing options...
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