STILL won't run right!!!

[Crazy_Steve]

Same problem as before...and now STILL does this with the AirDog150 installed.

On my way home tonight i wasn't on it too hard, gave it 1/3 throttle up a hill and then turned. Upon resuming acceleration the truck started jerking when i'd give it gas and if i gave it full throttle it had nothing. It actually was slowing down like i wasn't on the throttle at all.


It would go ok if i gave it less than 1/4 throttle, at 1/2 it began the jerking, and at full it did nothing. Kinda like a bog sound.


Any ideas as to the problem?


How do i make a log in EFILive of this activity??

[Timthecarman2004]

Can you scan the truck for fuel pressure while driving, and also is there a problem with the intake or possible restriction of air to the turbo? I think that this would throw the map sensor off and possibly not fuel the truck like it should...

[Crazy_Steve]

It's only after running hard for a period of time. If i went out and drove it now and gave it WOT, it would accel perfectly, then if i did it again, and then another it would do as described above.

It only behaves like this after ive given it the juice for a bit.

[Timthecarman2004]

It's only after running hard for a period of time. If i went out and drove it now and gave it WOT, it would accel perfectly, then if i did it again, and then another it would do as described above.

It only behaves like this after ive given it the juice for a bit.

Are the veins working ok on the turbo, maybe that is effecting it???

[Crazy_Steve]

I considered it, but if it were the vanes not allowing boost and it was getting sufficient fuel, then i would see smoke. But it doesnt smoke and it doesnt build boost from 1/2 throttle on.

Below half throttle it acts and performs normally.

[James Hess]

This may be an odd question but when was the last time you replaced your under hood fuel filter?

Unless the air dog system eliminates this filter then try to replace that and see what happens.

I could be out in left field though.):h

[blksmok]

You need to log fuel rail pressure. Narrow it down to what seems like a fuel delivery problem and then troubleshoot that. Does it do it with all your tunes or only a specific one?

[Crazy_Steve]

All.

I just logged 2 WOT runs for everyone to look at.

How do i post them?

[Nick]

Email them to me please.

Nick@duramaxtuner.com

[Crazy_Steve]

Sent.

[hondarider552]

Steve could you email me your logs as well?
hondarider552@yahoo.com

[Crazy_Steve]

Logs 1 and 2.

[rgullett83]

Looks to me that you are still losing rail pressure, have shimmed the Fuel Pressure Relief Valve Yet?