Bad mafs or wiring problem???

[Florida240sx]

I have my z32mafs wired like the one diagram posted. one ground one power to harness and other ground to chassis. Is this how yall have it wired? J-Z has both ground going to harness...... Most % on my Safc I've seen is 43% @ 17psi while the other night JZ had 42% at 8psi......Car drives fine up to 5800rpms where the timing jumps back to stock.....Car pulls hard up to this point...Any ideas???Your right Jz I remember now, but how we got the same damn turbo lol... Something is messed up.....
Modified by Florida240sx at 11:47 PM 9/7/2006

[j-z]

i dont think i hit %64 at 8 psi. remember you did that calculation on your phone and it came out to 260 something or so. i think it was more like %40 or around there. but at 13 psi i hit %64. maybe it has something to do with your tuned ecu? the grounds wont have anything to do with it.

[enigma2103]

have u tried contacting your ecu tuner?

[Florida240sx]

Yes already have....