Yet another thread about the dreaded P0300

[king_yukon]

So driving to work this morning I got a P0300 random misfire (at around 65mph it popped up) Also kinda hear a sputtering but i'm not sure if it's because of my new exhaust.

SOB, first thought of course. haha

For starters - parts that have been replaced in the last couple months -
down pipe and cats, cap, rotor, plugs, wires, and a fuel filter
seafoamed the truck half the bottom via the gas tank and the other half via the vacuum hose off the booster.
Most recently I did cat back custom dual exhaust with straight pipe no mufflers

So I waiting until it got dark tried misting all my spark components with no luck of seeing anything.

Anyone have another ideas?

 

[SunlitComet]

have you injectors checked or valves for stickiness.

 

[king_yukon]

No I have not. Thats why I decided to check here. Figured someone had an idea of what to look for? Now to play the stupid card, whats the best way to check the valves for stickness and injectors?

I was thinking about getting a new spider set up just for the hell of it. truck has high miles so might as well do it for the benefit factor eventually

 

[crxx]

i had that problem and i changed the spider injector and its been fine. this may help you out.... what i did was looked the spider injector up on amazon. its $100.00 cheaper than the local part stores(i called around). I pulled it up on my iphone and showed the price to the guy at autozone and they price-matched it! hope this helps you out too!

 

[king_yukon]

Thanks Crxx! that's what I was tihnking of doing anyway. it can't hurt that for sure haha

 

[robhenry2990]

the new style injector makes a big difference

 

[SunlitComet]

http://www.amazon.com/Delphi-FJ10566-Fuel-Injector/dp/B000TYLIFS/

 

[robhenry2990]

i bought from them too fast shipping

 

[Dalton916]

I just ordered from amazon as well as mine is all but gone....best my mechanic buddy could do was $350 from a dealership.

 

[king_yukon]

And the ***** of it... amazon wont ship those injectors to Canada! And amazon.ca doesn't have them. Its a special order item at the local shops around here.