"Hi Folks,
I went to dyno today and had a few suprises.
The first was the wideband Air Fuel measured on the car was off the charts rich (below 10 which is not measured) from approx 3000 to 4000 rpm then it straightened out in higher rpm. Also, my idle was way rich.
The second one was at higher rpm and boost (23 pounds) the spark seem to break up. I subsequently pulled a plug and it looked pretty foul from running race gas too rich. I will replace the spark plugs and hope this goes away.
My concern is that if the car continues to run rich I will just foul the plugs again.
My car is set to the default settings with the Turbo Tweak chip for this configuration. Fuel pressure is also verified at 43 pounds. I am running 22/23 pounds on boost with a half and half mixture of 110 and 91 octane gas. I installed a new maf translater and have it set for the impala MAF and at no change (0). I do not have any error codes on the scanmaster. About 400 miles ago, I replaced my 02 sensor with a heated 02 sensor. My scanmaster stopped reading O2 counts correctly. I am wondering if I need to try a normal 02 sensor again where I can read the o2 counts. The reason I mentioned this is if scanmaster is not reading the O2 maybe that is why it is running too rich in that 3000 to 4000 rpm band and idle.
Any thoughts? Thank You and sorry for the long note.
Please let me know if any scanmaster values would help. I am new to all of this, so I may need some instructions on which values and what rpm
Brent
1987 GN Astroroof, 45k, TE44C, 42.5 injectors, Duttweiler neck, TurboTweak, RJC Plenum, 3"" Poston Downpipe, MAF translator, Poston Headers, Hooker cat back, Poston Ram Air kit with K&N
"
I went to dyno today and had a few suprises.
The first was the wideband Air Fuel measured on the car was off the charts rich (below 10 which is not measured) from approx 3000 to 4000 rpm then it straightened out in higher rpm. Also, my idle was way rich.
The second one was at higher rpm and boost (23 pounds) the spark seem to break up. I subsequently pulled a plug and it looked pretty foul from running race gas too rich. I will replace the spark plugs and hope this goes away.
My concern is that if the car continues to run rich I will just foul the plugs again.
My car is set to the default settings with the Turbo Tweak chip for this configuration. Fuel pressure is also verified at 43 pounds. I am running 22/23 pounds on boost with a half and half mixture of 110 and 91 octane gas. I installed a new maf translater and have it set for the impala MAF and at no change (0). I do not have any error codes on the scanmaster. About 400 miles ago, I replaced my 02 sensor with a heated 02 sensor. My scanmaster stopped reading O2 counts correctly. I am wondering if I need to try a normal 02 sensor again where I can read the o2 counts. The reason I mentioned this is if scanmaster is not reading the O2 maybe that is why it is running too rich in that 3000 to 4000 rpm band and idle.
Any thoughts? Thank You and sorry for the long note.
Please let me know if any scanmaster values would help. I am new to all of this, so I may need some instructions on which values and what rpm
Brent
1987 GN Astroroof, 45k, TE44C, 42.5 injectors, Duttweiler neck, TurboTweak, RJC Plenum, 3"" Poston Downpipe, MAF translator, Poston Headers, Hooker cat back, Poston Ram Air kit with K&N
"
