Urgent - car on dyno

[Rory]

We are working on a turbo 5.3 in a sand rail which is not reacting to changes in VE and/or MAF cal changes.

It runs well just but lean at the top end, I have added to the VE and adjusted the MAF cal, neither makes a difference in final pulse width.

Also made change on VE in idle area which makes a change for the first few seconds after startup but then something steps in and forces the PW to 2.1.

Any help would is appreciated.

Attached is the last 2 cals and logs from the last 2 runs, o2 is not on the log but our dyno shows exactly the same afr on both cals. And as you can see the PW is roughly the same from 5k up.
The last cal is MAF is failed.

Thanks,
Rory

[mowton]

change DTC p0101-103 to mil on 1st error....

Ed M

[Rory]

Will changing the dtc solve the problems?

[Rory]

Will changing the dtc solve the problems?

[BNA]

Has fuel pressure been checked when its going lean?

[mowton]

Will changing the dtc solve the problems?

It will put the tune into Speed Density so you can make VE changes...

Ed M

[Rory]

Great, thanks.