3500 Chevy P0300 code

[jordanpowell]

Check for a vacuum leak around the intake along with the pcv hoses

[danielortega]

If you have High miles do a leak down test first before throwing parts at it.

[SuperVstech]

I'm with ya... same issue... working on injectors replacing soon...

[timwilliams]

You have to check out for a ground problem cause 10 out of of every problem, Ute you got a ground cable ain’t make a contact put a new ground cable on it the black wire that plugs into the coil pack the big gray one you have to hook a ground wire to the black wire in grounded to the frame

[isadhamid]

All the connection and all the connect there’s for the injection along with the firing and the spark plugs but what you need to do is change your intake, manifold gasket, both of them of it that’s all it needs

[Coloniero]

you should find out what cylinders are the one that are miss firing first then do a cylinder leak down test before replacing parts that ain’t needed and go from there miss firing can be caused by several different things but I would figure out what cylinders are causing you the trouble first. You can also do a compression test

[Brian-piyf]

Vacuum leaks, check the EGR valve and intake gaskets

[pops]

Wires can be cracked around connecters

[ubettershutuptj]

O2 sensor bank 2 sensor 1 right before the Cadillac converter

[alexisrodriguez]

Have you done a timing chain or belt? stretched timing chain, or belt can cause this code but usually only arises after 150, 000 miles or if driven very aggressively

[lovedestinyfr]

My 07 Chevy Silverado doin same thing they told me to change all my fuel injectors so I’m on dat now to see if it fix the problem

[santiagosbodyshop]

im with ya same issue i dont i chech everything i cant find it 😢

[lostinsperry]

I had no issues with my 06 and I changed plugs and wires.. as soon as I fired it up it ran like shit.. checked everything.. double checked everything.. no clue..

[Alanthemobilemechanic]

O2 sensor or electrical ground or clogged fuel filter

[kennethsouza]

The piston with most misfire the valve on the head is leaking air out the tb òr tailpipe do the test with piston topped.u rings are probably ok so its the valve the head needs work

[articulatingprimate]

So no update with fix? Or did you kust say fck it?

[Broman-essx]

It could be a rocker arm go e bad or even a valve, bad gas is an issue too throw some octane booster or heet in there, if not could be mechanical

[eus]

Should be running ac Delco double platinum plugs.

[beptex]

So what was the issue ? Please tell me I just wanna know please I replaced all the things you said in the video but now what was that last thing you replaced that fixed it?

[airplaneeverything]

Need to perform a crank relearn procedure