Boosted E40 -- MAF patch?

[Tony @ MPH]

Hi guys,

A shop we work with has a boosted E40 that was previously tuned with HPT. It had a GM OS upgrade applied at the dealership and needed to be reflashed back to the boosted tune. The boosted tune was saved in EFI prior to the GM reflash.

Now the car has issues with the MAF maxing out. The old tune was transposed into the new OS and the MAF patch was applied, but it will not allow the tuner to enter a higher number than the 16,xxx OEM default.

Is there a trick to raising the MAF limits on an E40 I'm not aware of?

Thanks,
Tony

[Bruce Melton]

Or any OS?

[Delco]

Hi guys,

A shop we work with has a boosted E40 that was previously tuned with HPT. It had a GM OS upgrade applied at the dealership and needed to be reflashed back to the boosted tune. The boosted tune was saved in EFI prior to the GM reflash.

Now the car has issues with the MAF maxing out. The old tune was transposed into the new OS and the MAF patch was applied, but it will not allow the tuner to enter a higher number than the 16,xxx OEM default.

Is there a trick to raising the MAF limits on an E40 I'm not aware of?

Thanks,
Tony

It will require a full flash as the others operating system has added tables I believe , much like our custom OS