Fuel pressure

[killerbee]

Is it idle mode (only) that is messed up for you? Or all ops.

[DuramaxPowered]

cruising on the highway it's off also.......Rail pressure should be 17000 according to the tune, but desired and actual from scan tool is showing 11500-12000psi. Seems to be off everywhere.

[killerbee]

cruising on the highway it's off also.......Rail pressure should be 17000 according to the tune, but desired and actual from scan tool is showing 11500-12000psi. Seems to be off everywhere.

even with the suggested rpm axis changes? IOW changing the axis (in your mind) should reveal a long hand way of seeing a valid number. (if I am correct)

It is just hard to know if I am communicating my thought.

[DuramaxPowered]

I'll look at the table using LBZ labeling.............Idling definately has a different table that it references.

[DuramaxPowered]

There are 20 columns in an LBZ rail pressure table and 23 in the LMM......

[killerbee]

There are 20 columns in an LBZ rail pressure table and 23 in the LMM......

yuh, excel is your friend. Hope you are good with interpolation programming.

[killerbee]

or

the new calz files may have addressed this. Have you swapped them out yet?

[killerbee]

I just tried it. The new CALZ does not address this from what I can see.

[GMPX]

I don't have any development stuff on my laptop so I can't really double check anything, but maybe also try changing B1059, your fuel pressure maybe getting limited by too little desired flow from that table.

[killerbee]

B1056 is a problem also. It is defined as an ECT pressure correction, but I don't see an ECT element in the table, or an ECT multiplier.