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Tech501
Tech501, Auto Service Technician
Category: Car
Satisfied Customers: 747
Experience:  38 years exp, ASE Mastertech with L1 Advanced Engine performance
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Runs great..cold... soon as it get to normal opp, temp.. no spark.

Customer Question

this car is new to me. runs great when cold... soon as it get to normal opp, temp.. no spark.
can you help?
Thanks Bill
Submitted: 11 years ago.
Category: Car
Expert:  Tech501 replied 11 years ago.

 First check to see if you have injecter pulse using a noid light (shown below). If you don't have injecter pulse either, you may have a bad pick up in the distributor. If it' only spark your lacking, blame the ignition module also call a power transister.  


Customer: replied 11 years ago.
Reply to Tech501's Post: HI I have another motor... can I swap parts. and if so where would they be located? it dose have hit and mis spark when warm..
Thanks BIll
Expert:  Tech501 replied 11 years ago.
 Not until you test enough to know what to swap. I need to know if you have injecter pulse.
Customer: replied 11 years ago.
Reply to Tech501's Post: OK... I have no voltage @ injectors... and no spark.. it made like a lound sucking noise from the intake when it dies..
Thanks Bill
Customer: replied 11 years ago.
O'yeah.. it has a coil pack.
Expert:  Tech501 replied 11 years ago.
 OK, I assume you did check that with the key on. Look at all your fuses real close. The data bank is down right now so I can't look at a schematic. I'll try to get more detail when I can study the wiring.
Customer: replied 11 years ago.
Reply to Tech501's Post: yeah I had the car running... as soon as it died I had some one crank it while I tested it.
Expert:  Tech501 replied 11 years ago.
 One side of the plug is supposed to have contant 12v and the other has pulsing  ground. It's the power that you found missing, right?
Customer: replied 11 years ago.
Reply to Tech501's Post: yes   no power when motor gets warm.... it had power when it was cold.
Expert:  Tech501 replied 11 years ago.
 A bad computer is a possibility here also.

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