Fuel Cut #3

[sleepydsm]

Did another boost leak test, found the TB shaft seals were leaking and two of the injector seals were pretty bad. I replaced all four injector seals, and I also flipped the fuel cut switch on the MAFT to allow factory fuel cut. (I misplaced my Instructions for the MAFT, so according to Tuners it's switch #3 needs to be in the down position, maybe someone can confirm that)

I just don't get why no one else has problems running 15psi on the stock fuel system/ecu.

[Andrew7dg]

Stock exhaust?

When I replaced my exhaust, major boost creep happened and it would go to like 19 psi. BOOM, fuel cut... But you Probably have a gauge to look at that.

I would get fuel cut all the time in my car just because of the exhaust

Do you have something with MMcd To see what the computer is seeing? Have you looked at your FTs? I had to adjust mine to the GM maf-t because it was off. Thats why there are adjustment knobs in the box. Every GM maf reads slightly different. GM ECU corrects this already but we are working off of this box.

These tuning knobs shouldn't be used for tuning bigger injectors. IMO they suck because they only tune LOW, MED and HIGH and there needs to be more points to tune with then just three. An SAFC ontop of the GM maf-t for tuning would be Ideal. If you were to do that though, the 2G MAS plus and SAFC reads much much better then the GM MAF-t (I have had bad experiences with the MAF-T). I believe the SAFC also takes into account Trottle position.

[sleepydsm]

Originally Posted by Andrew7dg

Stock exhaust?

When I replaced my exhaust, major boost creep happened and it would go to like 19 psi. BOOM, fuel cut... But you Probably have a gauge to look at that.

I would get fuel cut all the time in my car just because of the exhaust

Do you have something with MMcd To see what the computer is seeing? Have you looked at your FTs? I had to adjust mine to the GM maf-t because it was off. Thats why there are adjustment knobs in the box. Every GM maf reads slightly different. GM ECU corrects this already but we are working off of this box.

These tuning knobs shouldn't be used for tuning bigger injectors. IMO they suck because they only tune LOW, MED and HIGH and there needs to be more points to tune with then just three. An SAFC ontop of the GM maf-t for tuning would be Ideal. If you were to do that though, the 2G MAS plus and SAFC reads much much better then the GM MAF-t (I have had bad experiences with the MAF-T). I believe the SAFC also takes into account Trottle position.

I have exhaust, the car is not boost creeping. I'm running 15psi and wondering why my ecu is seeing too much airflow, i just find it hard to believe I'm exceeding the max set airflow (which I know isnt a huge number, but still).