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browermech
New User
Apr 13, 2010, 3:11 PM
Post #1 of 2
(2311 views)
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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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Sidom
Veteran
/ Moderator
Apr 18, 2010, 5:43 PM
Post #2 of 2
(2273 views)
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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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