--DEQ DIAGNOSTIC TROUBLE CODE P0300 - OREGON DEQ. RANDON/MULTIPLE MISFIRE DETECTED.-----
IS THERE ANY WAY TO NARROW DOWN THE PROBLEM, AND WHAT CAN I DO AT HOME TO MAYBE FIX ENOUGH TO GET THROUGH DEQ TEST SO I CAN GET NEW TAGS. VERY LITTLE CASH TO WORK WITH. ANY HELP APPRECIATED.
PS- SEEMS TO RUN VERY WELL - SELDOM NOTICABLE MISFIRE.
First is up you octane with an adative or tank of has. the next would be to inspect your rotor cap for crac ks/ scale build up. if showing a lot of build up on the contacts replace cap and rotor button. Those ate the easiest and cheapest improvements. the octane boost reduces the misfire due to detonation
SOURCE: fault code I believe is p0300
P0300 is a misfire that the engine computer hasn't or can't pinpoint to a specific cylinder yet
SOURCE: put a checker on it and got a p03000 random multiple cyl misfire
you are getting a misfire and 99% of the time you need a tune up
plugs and wires and clean your throttlebody
SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced
SOURCE: 03m grand am p0300 multiple misfires, cats seem
I have a 2003 Chevy cavalier .Where is the egr valve?
SOURCE: setting code P0300- random multiple
This could be any number of problems in your spark system but most likely your control module for your spark plug coils.
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