P0251 6.5l please help.

[Trucker2k16]

I guess it's your choice which to try

The dot to dot lines up on the ip drive gears

 

[ak diesel driver]

Usually it's the crank keyway that shears

 

[Trucker2k16]

Usually it's the crank keyway that shears

Ima checking if so is cloyes a good brand?

 

[Will L.]

Yes. Cloyes is good

 

[Trucker2k16]

Is something missing? I think the keyway left

 

[Trucker2k16]

Here these are dot to dot and the balancer is on 0 tdc so i dont think she jumped timing there is a keyway in the crank sprocket and i have absolutely no play what so ever no matter how slow i turn the crank everything moves at once

 

[ak diesel driver]

IIRC the key is one continuous long key. Not to say two shorter ones wouldn't work

 

[ak diesel driver]

So if you turn the Crank one full turn the cam dot and the IP dot line up?

 

[Trucker2k16]

So if you turn the Crank one full turn the cam dot and the IP dot line up?

On the drive gears yes cam and ip line up my old egine has to small keys also i just looked at my old crank

 

[ak diesel driver]

Pretty much narrows it down to the IP. Could be wiring issue but doesn't really sound like it. Gotta spare PCM you could try?

 

[Trucker2k16]

Pretty much narrows it down to the IP. Could be wiring issue but doesn't really sound like it. Gotta spare PCM you could try?

Nope i only have the tuned ecm from quadstar it could be my bulk head harness

 

[Trucker2k16]

Im replacing my crank sensor again under warranty it ohms at 008 new time keeper set since i was already in there and new injection pump under warranty. Hopefully it will relearn now if not i found a tech 2 if that dont work ill return the scanner amd pull the motor sell and put a supercharged 383 in its place

 

[JMJNet]

Not sure if you mentioned it in previous post but did you put ACDelco CPS?

 

[Trucker2k16]

Not sure if you mentioned it in previous post but did you put ACDelco CPS?

I had a standard from o reillys but now i have a acdelco

 

[JMJNet]

You need ACDelco, otherwise you are going to be in a wild goose chase troubleshooting.

All parts that is of sensors/senders need to be ACDelco.
They are still more reliable than the aftermarket.
That does not mean they cannot fail or DOA but the rate of failure is lower.

 

[Trucker2k16]

You need ACDelco, otherwise you are going to be in a wild goose chase troubleshooting.

All parts that is of sensors/senders need to be ACDelco.
They are still more reliable than the aftermarket.
That does not mean they cannot fail or DOA but the rate of failure is lower.

Absolutely see i rebuilt this truck a year ago with everything being new and upgrades and no problems i ended up getting alot of water few months back so i replaced tank and all lines then boom this ive been told the water and algae could of messed up the ip so im replacing every under warranty new chain and another new crank sensor and hopefully it will relearn i dont get why it wouldn't. My timing was 10.1 on des and act my tdco was -0.44 and a tuned ecm and super 60 turbo hi flow upper etc

 

[denata]

Manual p0251

 

[Trucker2k16]

Manual p0251

Automatic

 

[Trucker2k16]

Is this what i need to do a relearn by a scanner?

 

[ak diesel driver]

yes that will do it