Having problems with your Cars & Trucks ?

I have an 2002 chevy silverado 5.3 1500 getting po300 random Multiple misfires only when i get up and go real fast i have changed the spark plugs, wires, coils were tested there good changes the fuel pump and fuel filter and the Throttle position sensor still doing what is going on please help

Posted / edited by AnonymousUser on : 15-07-2019

Answers :

Do you know what the fuel pressure is at idle and cruise speed ?
Any vac leaks ?
The code means that more than one cylinder has lost power and not the same one every time. Could be injector problems or fuel pressure or cam-valves among other things.
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