The P0300-302 are all misfire codes. I'd guess likely due to either a timing chain/tensioner issue OR it all could just be traced back to and connected to a hpfp issue. It's all such a guessing game without plugging into the vehicle a running a diagnostic check on a few things. Dealers are such crap shoots with this short of ****.

 

Update! I switch out new crankshaft position sensor. No luck, it's obviously fuel pressure regulator. Cause when I start my car it bogging, I had somebody with my hearing my car out. I pressed my gas pedal to give it alittle gas then it starting to smooth it out but rough. So, I have to get new fuel pressure regulator.

Is there a recall for that ?

 

Took out fuel pressure regulator and I pressed relief pressure valve where it go to fuel pressure regulator and it don't squirt out much fuel at all. That's after I started up my car then shut it off, this must be it.

 

UPDATE! Found the problems! It's lash adjusters and rocker arms are broke! Gonna fix it! WOOT!

 

Post #7. What's my prize?

 

High 5 Man!

 

I cannot believe the dealer did not pull the valve cover to check the timing chain and lash adjusters if they suspected a timing chain issue?!

 

They want $$$ before they actually turn bolts. Pathetic considering how easy it would have been.

 

I know...They want $440 dollars to tear my engine apart to find what's the problem. They won't put it back if they find it then they will adding up the charges on these parts then SLAP you with rape price. I'm glad that I stopped them and took my car back.

 

I hear you. When my engine took a crap they offered to take it apart at my expense to find the cause. I said that the coolant is peeing into the oil, I know the cause.

 

Yeah...What tool should I use to take out rocker arms.

 

Bump!

 

Update! I finally fixed my car today...Put new rocker arms and lash adjusters. Started the car, still end up the same thing! My car most likely are FUCKED!