I'm a transport and I just got home this Friday. I had my engine light come on sayin cylinder 4 injector open. I took of my valve cover to change the injector..well I changed the injector and put everything thing back. I went to start and engine won't start at all..Idk y but I drove thr truck just fine in thr garage. I don't know if the cylinders are filled with diesel..? Would it still start?..I don't know..anyone know?

 

Does it turn over? If it does, it isn't full of diesel.

I'm not a good CR guy, but somewhere I have read that you have to tell the Computer that you changed the injector, perhaps someone else who is familiar with the late model stuff will chime in.

 

Hmm..ok that sounds about right..I do know anything I do on this 6.7 I have to tell the ecu..but I really didn't know about a fuel injector..and I thought about it..where the cylinders are fuel of diesel. Anyone know how to get the diesel out of the cylinders?

 

Or how to bleed the system?

 

you do not need to bleed the system. lets go back and start over, the usual thing that happens to trip the #4 injector code is high ohms on the coil. i have seen more problems with the harness than the solenoid. i think on the 6.7 there is two plugs that serve three injectors each. pull the plug apart and check each of the three with a ohm meter. should read about 0.5 ohms if #4 is higher than 1 pull the valve cover and check directly on the solenoid. if low there the harness is bad if both are good i have seen corrosion on the plug cause this. clean with wd-40 and try again. the injector change requires four torque's and make sure you did not leave the old copper ring in. if you do not do the proper sequence on the torque the tube may not seat good on the injector causing the exact problem you have

 

Ok ill check..but u think my cylinders are not full of diesel?

 

Turn the engine over a couple complete revolutions. If you can do this, the cylinders aren't full of fuel!

 

Ok..so its not full of diesel..anyone know how to bleed a 6.7?

 

No need to bleed it, at the pressures they run, it will bleed itself in very short order.

 

Ok thanks for that info..an other thing..can one of the cylinders get full of diesel while cranking over and over for a few time and bend a piston rod?

 

A few times, no. I suppose if the whole Injector tip were blown away you could, but even then it would be a far stretch.

 

And even at that, if he was turning it over, it would just blow it all out the exhaust stroke before it could fill the cylinder anyway.

 

That was my thought, but I didn't want to calculate what volume of fuel could go through a broken tip at 5,000 plus PSI......

 

Neither did I, mainly because I couldn't if I tried. So I just blurted out my first thought!