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04-12-2010, 01:20 PM | #1 | |
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1985 caprice help
its a 85 caprice 5.0 engine hi my check engine light came on so i bought a tester for my car and tested it i got error codes 12 and 42.....
.code 12 sais "this code will flash whenever the diagnostic terminal is grounded with the ignition on and the engine not running.. if this code appears while the engine is running, no reference pulses from the distributor are reaching the ecm.." Code 42..."Electric spark timing" sais "poor electric connection, open or short circuit; defective ignition module; defective ecm.." please help..... the light is on while the engine is runnin.....i have no idea what this could be any help will be great thank you....i replaced the ignition coil and distributor my car runs |
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04-12-2010, 09:28 PM | #2 | ||
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Re: 1985 caprice help
Quote:
code 42 is electronic spark timing [EST] bypass circuit is grounded... did you replace the cap/ignition module / rotor ? so again what did you replace? because this is a little weird when you say you replaced ignition coil and distributor and what about the other componets as this is not a usual way to service this ignition system ... |
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04-12-2010, 10:19 PM | #3 | |
Confoundingly Lucid
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Re: 1985 caprice help
Code 42 will occur if the EST cable to the distributor is disconnected (the 4 wire connection to the distributor). Make sure this cable is connected. You have to disconnect it in order to replace the distributor.
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04-15-2010, 12:42 PM | #4 | |
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Re: 1985 caprice help
i replaice all that you said and the light turned off thank you
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04-15-2010, 12:43 PM | #5 | ||
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Re: 1985 caprice help
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04-15-2010, 08:05 PM | #6 | ||
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Re: 1985 caprice help
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good luck with your vehicle .. |
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