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New User

Apr 13, 2010, 3:11 PM

Post #1 of 2 (1714 views)
ECU Sign In

I have a 2000 chevy silverado with a 5.3L Z-71 mileage 215,788

my engine code keeps coming up with p300 and p304 random and #4 cyl. misfire. I have changed spark plugs and wires and have replaced the #4 (Ing.) spark pack on #4 cyl. is my ecu bad?

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Apr 18, 2010, 5:43 PM

Post #2 of 2 (1676 views)
Re: ECU Sign In

A little soon to be condemning the PCM.....

With that many miles I think I would take a compression reading both hot & cold to start with........

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