Help!! WOT Sputter
Thread Starter
Teching In
Joined: Mar 2005
Posts: 5
Likes: 0
Help!! WOT Sputter I have a '98 motor with 232/236 comp cam, stage 2 heads, long tube headers, z06 intake, 78 mm TB, Granatelli MAF.
Problem is the car runs strong under part throttle accelerations but as soon as I go to WOT it sputters and looses power. My wide band O2 shows 12.8 A/F ratio during WOT and timing is around 15 - 17 degrees.
Any ideas out there????
LS1 Bimmer
Problem is the car runs strong under part throttle accelerations but as soon as I go to WOT it sputters and looses power. My wide band O2 shows 12.8 A/F ratio during WOT and timing is around 15 - 17 degrees.
Any ideas out there????
LS1 Bimmer
Thread Starter
Teching In
Joined: Mar 2005
Posts: 5
Likes: 0
[QUOTE=TNorman]More info. A4? M6? Tuned? First, ditch the Granatelli.[/QUOTE
M6, 28.8 injectors. I have modified my IFR so that my LTFT is around zero. After this I was running WOT A/F around 10.5 so I backed fuel out of the WOT table and the AF is right around 12.8.
I thought about ditching the Granatelli but it didn't seem to make sense since my A/F ratio is right where I think it should. But I'm willing to try anything so I will switch back to my stock MAF today.
thanks - mike
M6, 28.8 injectors. I have modified my IFR so that my LTFT is around zero. After this I was running WOT A/F around 10.5 so I backed fuel out of the WOT table and the AF is right around 12.8.
I thought about ditching the Granatelli but it didn't seem to make sense since my A/F ratio is right where I think it should. But I'm willing to try anything so I will switch back to my stock MAF today.
thanks - mike
Thread Starter
Teching In
Joined: Mar 2005
Posts: 5
Likes: 0
Originally Posted by TNorman
12.8? Try 13.5:1 if you are N/A. Check the simple things like plugs, pins in the connectors (make sure they are tight). Any KR?
thanks - ike
Thread Starter
Teching In
Joined: Mar 2005
Posts: 5
Likes: 0
AF going crazy
Originally Posted by TNorman
12.8? Try 13.5:1 if you are N/A. Check the simple things like plugs, pins in the connectors (make sure they are tight). Any KR?
Another thing I have noticed is my scan tool never shows open loop? I go into cell 22 which I think is the PE cell but I am still in closed loop. I thought for WOT it is supposed to be open loop?
Any suggestions?
