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2000 5.3l Vortec

ryant79

By ryant79
in Ask A GM Technician

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ryant79 New Member

ryant79

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Posted

i have changed spark plugs coil wires all 4 o2 sensors map sensor.

 

egr valve is good. maf sensor is good. tps is good i tested all these. cleaned fuel injectors. comes up with the code p0300. p131.p151 all the vacume lines are good.

 

 

i just went out and started the truck it warmed up fine. when it got warm it started missing bad idle and blowing out black smoke and black liquid on the pavement.

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