#16: Re: PO300 Random/Multiple Misfire Author: alexhodge1234, Location: LeedsPosted: Fri Dec 17, 2010 3:27 pm ---- No one?
#17: Re: PO300 Random/Multiple Misfire Author: Spanners, Posted: Mon Oct 24, 2016 8:00 pm ---- Well goddammit, ive got a very similar issue, this is starting to get me down, P0300 shouting out, weve had the car about a yr now at first it was fine, then 3 months in a P0171 was throwing up with a P0350, now before we bought the car it had a new cat and post cat O2 sensor, its now had a cam belt change a new pre cat O2 sensor twice as the replacements wires became brittle and cracked ( managed to get a refund too ), I replaced the coil pack and spark plugs ( NGK ) it seemed fine for a week or two then came back.
Now I've been out and got some bosch plugs and have a date tomorrow with an EGR valve and injector inspection. How will I be able to tell if its a fouled faulty injector, ive heard it can be difficult to diagnose. Im also going to see if there is a vacuum leak in the air box.
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