Misfire
 

3rd Gen, I love the truck. It went into limp mode, I had the turbo checked, and it’s good. Put a new waste gate actuator and solenoid on it. I changed the air temp sensor, manifold presser sensor. It had a code 2146. I ohmed out fuel injectors and found a bad one, I changed it and the harness and fuel filter. It ran good for about 5 minutes and then it threw codes 300, 304 and 306. Which is misfires in cylinders 4&6. What else can it be? What have I not looked at? I need my truck! Any help will be appreciated.
Ed:scare2:

Clean all your grounds and check the harness plug to the injectors! Clear the codes. If one injector was bad probably all need to be replaced.

misfire
 

thanks i will be changing the harness connectors this weekend and cleaning grounds. Hope thats it.

if the harness does not fix it we can test the injectors for $15 each.

misfire
 

After changing the connectors on the injector harness and cleaning all the grounds, it seemed to fix it, but now I have a knock. When I took the rocker arm off and did not touch the adjustment screw. Could it have gone out of adjustment? The oil level is good.
Thanks
Ed

Run the valve adjust just because!! Knock can be several things from nothing to OMG!
An injector dumping fuel will do it as will a valve seat. Even a programmer can do it but start with the valve adjust!

hey thanks, i found it,
I got home and it was still knocking, i did not think it was valve adjustment cause i did not touch it and it ran fine before. So I took off the valve cover and started it and then took a wire off of the injector i just replaced. Go figure the knock stopped.
so I got a bad one.
going to call them up today and have them send me another one.
thanks again
Ed

I hope that's what it is and not a bad piston be sure to boroscope the cylinder when you get the injector out!

bad meaning what? its not smoking at all. never had.

melted piston. Common on trucks that lose a injector and run for a while without knowing it. Put a camera down the hole just for piece of mind! Rare that a new injector is bad but possible! I'm just guessing without actually seeing it! Valve seat still comes to mind but depends on the year early models 03 04 more likely.