Has this as an intermittent problem. 99% of the time it happens while going uphill under load. Code lists out as MAF : Circuit range performance problem. The MAP value is always the same in the freeze data. It does change when viewing live data though. It never shows a negative pressure in the intake though even when going downhill with a closed throttle where I would think the engine would draw a vac in the intake, so I am thinking that it is possibly the real problem.
Typical freeze data read with an Actron CP9145 scanner.
TPS : 70 - 73.7 % - RPM : 3000 - 3480 load : 50 - 59% MAF : 11 - 12.9 MAP : 26.9 "Hg Speed : 40 - 46 Mph
MIL light shuts off after 3 restarts and it may go 2 weeks without it coming on again.
It has had a new set of plugs, wires and the intake gaskets were changed out with no effect on the code (done more as a preventative anyway since I had some time to work on it and this problem doesn't seem to effect the drivability). Cleaned the MAF and swapped it with a different one, same readings with the new unit so I swapped them back.
Figure I'd ask for other opinions.