L99 won't run with MAF enabled

I added a TorqStorm supercharger to my 6.0 running a L99 OS on E85 and after shutting off the MAF to tune the VVE the engine will not run or idle with the MAF reenabled. If I unplug or turn off the MAF in the tune the engine will run and idle fine. I tried another new Hitachi brand MAF with the same results.

The MAF frequency and intake air temp both have good realistic data in the data log so I have a hard time believing both the MAF sensors are bad but I'll return the new one under warranty and try again.

I shut off the MAF/ MAP/ throttle pedal correlations/ performance checks thinking that the supercharger was exceeding what they were stock and causing the issue.

Attached is the engine file, any help is greatly appreciated.

Have you tried to tune it in MAF only?

I set B8024 to 400 rpm and B8025 to 390 rpm to force it to run off the MAF at all speeds and it still won't run or idle. Only thing that works is shutting the MAF off, C0301 set to 10, C0302 at 13500, C0303 to 10, and C0305 to 10. Changing P0101, P0102, and P0103 makes no difference.

I think I have the issue solved. It ran long enough for my wide band to start reading and it was over 1.4 lambda, I added around 40% to the MAF freq table B1099 and it now runs a lot better and around 1.05 lambda at idle. I didn't expect the supercharger to make that large of a change and also didn't expect the MAF to even be effecting the AFR around idle with B8024 set to 4000 and B8025 set to 3900. Now on to tuning the MAF off the wide band.

Quote:

---

Originally Posted by cynight

I think I have the issue solved. It ran long enough for my wide band to start reading and it was over 1.4 lambda, I added around 40% to the MAF freq table B1099 and it now runs a lot better and around 1.05 lambda at idle. I didn't expect the supercharger to make that large of a change and also didn't expect the MAF to even be effecting the AFR around idle with B8024 set to 4000 and B8025 set to 3900. Now on to tuning the MAF off the wide band.

---

are you 100% sure your injector data is correct?

That is a good point. I used that data provided by FIC for the 660cc injectors I installed. I did notice their data for one of the tables was in lbs/ hr and the EFI Live table is in grams/second. The VVE table around idle wasn't far off. Other than a zone boundary issue causing a lean spot it runs fairly decent. I'll double check the data to be sure