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Re: 1995 Jimmy misfires when cold
Miss fire can overload 02 sensor.
Work on the missfire first.
Are you using good ac plugs and tune up stuff?
Can you feel the engine miss under load or at idle?
Good hot spark to all plugs?
Are all plugs firing good?
Good fuel pressure?
Is it the old style dist cap or the newer flat top dist?
What engine code?
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Remember proper testing gives us the answer to many problems.
MT
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