1999 silverado misfire
January 8th, 2013, 3:35 PM
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1999 silverado misfire
New here and hoping for help.I have a 99 silverado that i changed the motor in do to main and cam bearing ware.Put new/used motor in now this one has a misfire i cant get rid of.I changed pluges, wires, coil, injectors, o2 sensors, and egr and its still there does anyone have any other sugestions please help
January 8th, 2013, 3:45 PM
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are you getting po300? Sometimes a cracked intake will cause that code. try doing a compression check on the cylinder that is missing. I had a 5.3 that had a dead miss that caused all sorts of funny codes. Turned out to be a broke valve spring on the intake side
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buddyleno
Silverado, Sierra & Fullsize Pick-ups
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March 31st, 2017 8:13 AM
