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Old 10-21-2017, 10:09 AM   #1
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Join Date: Feb 2013
Location: daytona beach
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grin p0300 is killing me

Morning y'all, The other day my 99 hoe with the vortec 5.7 started misfiring bad. I went to the part store and they told me P0300. multi misfires. so I changed out
wires, cap, and rotor
camshaft sensor, crank sensor
Spider injectors.
nothing has changed.
I replaces the coil and still no change.
I also blocked off the egr valve and still no change.
I did pull off the valve covers and all the rockers are moving fine.

Can someone please help.

Thank you
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