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Old 09-05-2017, 03:36 PM   #1
GaryC
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Join Date: Jul 2011
Location: Pittsburgh
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Sudden random misfires..2.2l

Been fighting a goofy problem for the last month. Had the dreaded ignition switch problems. Replace tumbler and housing, that took care of a bunch of no start/dash light issues. A problem that was happening in tandem with the ignition switch is "random misfires". That's the code it sets, when it does set the code (doesn't always). The engine starts misfiring, sputtering, back firing etc. You can shut it off and restart and it will be fine most of the time, other times it goes on like that then fixes itself and runs fine. Other than the ignition switch and housing , I've replaced the Ignition Control Module, which didn't help at all. Any ideas?

2002 Alero 2.2l 4, 5 speed.

Thanks, Gary

Last edited by GaryC : 09-05-2017 at 03:39 PM.
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