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How will you know your pcm went out?

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Old 09-13-2009, 08:04 PM
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Red face How will you know your pcm went out?
What are the symptoms when pcm goes out?
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Old 09-13-2009, 08:12 PM
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wouldn't that just screw up a shitload of things at once?
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Old 09-13-2009, 08:23 PM
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^ Yes, lots of screwups at once.

Could be no tach, no start, no power on the DLC connector.

Might also be more suble, such as all is o.k. except one circuit doesn't work that pulses your #3 injector.
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Old 09-13-2009, 08:46 PM
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My dash don't light up, car don't turn over, but power works.
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Old 09-13-2009, 08:51 PM
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all fuses good? i know it sounds dumb but it's easy to miss stuff.
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Old 09-13-2009, 09:03 PM
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never checked ,an which fuses to check under the hood or under the dashboard?
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Old 09-13-2009, 09:24 PM
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I would just check them all. It can't hurt anything and you eliminate all of them as an issue...
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Old 09-14-2009, 05:10 PM
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it was the cluster fuse ,but when i changed it the second service engine soon light came on, an this is the 1st time i've seen that light on. The on located where the rpm is.
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