Runs poor with Granetelli Mass Air
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Runs poor with Granetelli Mass Air
1989 Iroc 350 with paxton blower was running on a Granetelli ADJ Mass air .
The car would throw code 33 and 45 , and would buck and cut out. From what I have read the unit flows more air than the ecu can read , probably even more so with the supercharger. Just switched it back to the OEM bosch unit and no check engine light , no bucking , no cutting out during cruising throttle. However the car feels like it lost quite a bit of Torque and Horsepower.
Would it be time for speed density and ecu modding/replacement?
The car would throw code 33 and 45 , and would buck and cut out. From what I have read the unit flows more air than the ecu can read , probably even more so with the supercharger. Just switched it back to the OEM bosch unit and no check engine light , no bucking , no cutting out during cruising throttle. However the car feels like it lost quite a bit of Torque and Horsepower.
Would it be time for speed density and ecu modding/replacement?
Last edited by 614Streets; Apr 9, 2012 at 11:04 PM.
Joined: Oct 2001
Posts: 12,232
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Runs poor with Granetelli Mass Air
1989 Iroc 350 with paxton blower was running on a Granetelli ADJ Mass air .
The car would throw code 33 and 45 , and would buck and cut out. From what I have read the unit flows more air than the ecu can read , probably even more so with the supercharger. Just switched it back to the OEM bosch unit and no check engine light , no bucking , no cutting out during cruising throttle. However the car feels like it lost quite a bit of Torque and Horsepower.
Would it be time for speed density and ecu modding/replacement?
The car would throw code 33 and 45 , and would buck and cut out. From what I have read the unit flows more air than the ecu can read , probably even more so with the supercharger. Just switched it back to the OEM bosch unit and no check engine light , no bucking , no cutting out during cruising throttle. However the car feels like it lost quite a bit of Torque and Horsepower.
Would it be time for speed density and ecu modding/replacement?
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From: Chicago south suburbs
Car: 1988 IROC-Z28
Engine: L98(383tpi) modified
Transmission: 700R4 rebuilt
Axle/Gears: 3:73 10bolt rebuilt
Re: Runs poor with Granetelli Mass Air
Sorry to jump into your thread,
but I have a Granetelli ADJ Mass air. on my 383 TPI They are and can be very temperamental as was mine. I've talked to a couple of different techs at their shop and even sent mine to them to make sure there was nothing wrong with it. They didn't charge me a dime, and were very helpful in resolving the issues I had. I would say give them a call before you give up on it. I'm very happy with mine, even my "Butt Dyno" says its better than the stock version which I still have, and yes I did modify my stock one.
but I have a Granetelli ADJ Mass air. on my 383 TPI They are and can be very temperamental as was mine. I've talked to a couple of different techs at their shop and even sent mine to them to make sure there was nothing wrong with it. They didn't charge me a dime, and were very helpful in resolving the issues I had. I would say give them a call before you give up on it. I'm very happy with mine, even my "Butt Dyno" says its better than the stock version which I still have, and yes I did modify my stock one.
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