Aftemarket Maf Sensors Stay Away From Them

96chevy7.4L · June 7, 2008

hi just to let everyone know stay away from the MAF sensors from granatelli, jet any, of them. Stay with the sotck one even with the screen. They are okay if you plan to do absolutely nothing else to the truck. IF you use a program or anything they will cause an excessive an unwanted lean condition. Just a warning so maybe someone else don't learn the hard way with a burnt piston or something. I kept an eye on it checking the plugs often and they got way to lean for my confort.

drpurplethumb · December 26, 2010

hi just to let everyone know stay away from the MAF sensors from granatelli, jet any, of them. Stay with the sotck one even with the screen. They are okay if you plan to do absolutely nothing else to the truck. IF you use a program or anything they will cause an excessive an unwanted lean condition. Just a warning so maybe someone else don't learn the hard way with a burnt piston or something. I kept an eye on it checking the plugs often and they got way to lean for my confort.

amen. i just upgraded my intake system. i bought a granatelli maf. thinking it was 80 mm. it is 75 mm and nearly identical to the stock maf. definitely not $300 worth of a difference. after installing new plugs, wires, 80mm bbk throttle body, and an aem brute force intake kit i was receiving bank2 lean codes. i put the stock maf back on. cleared the codes and ran the truck. i rechecked for codes. everything was fine. i thought i would give the granatelli the benefit of the doubt. so i reinstalled it. i plugged my scan tool in. immediately i received a code for bank 1 lean. im sending it back to them on monday. not worth the headache.

DwayneJ · January 10, 2011

Stock tuning it generally safely rich under power enrichment, garbage like the Granatelli tries to under report airflow to lean that out a little for maximum power. For similar or less money you can get aftermarket performance programming that not only corrects the air fuel ratio but optimized timing and tranny shifting.

Anything that lies to the pcm to manipulate it's commands is a bad thing, especially when these pcms are so easily reprogrammed to do what you want them too.