can the accel enrichment voltages be changed?
Posted: Sat May 07, 2011 11:47 pm
Hi all long time user of nistune and pesterer of matt!
have come across a minor issue i would love to get some other thoughts on.
relates to a tb42e engine in a Y60 GQ patrol, turbocharged, 550cc injectors with a Q45 MAF, tuned up fine today on the dyno (despite fuel pump running out of puff)
however the just off closed throttle has a lean spot, it seems it is part of the 4 throttle enrichment tables, as they are split into <600rpm, 600-1200, 1200-1800 and so on.
the issue is with the larger MAF, idle MAF voltage is around 1.18v and the 600-1200 throttle enrichment table starts at 1.92v.
when the throttle is opened to take up the clutch or similar, the AFR is dropping suddenly then cleans up as the MAF voltage rises above this point.
My question is can this voltage be changed in the table so the throttle pump works properly with the new MAF? i dont think this can be solved with the main fuel table alone as this is ignored to an extent until the throttle pump time passes.
welcome any input.
cheers
cam
have come across a minor issue i would love to get some other thoughts on.
relates to a tb42e engine in a Y60 GQ patrol, turbocharged, 550cc injectors with a Q45 MAF, tuned up fine today on the dyno (despite fuel pump running out of puff)
however the just off closed throttle has a lean spot, it seems it is part of the 4 throttle enrichment tables, as they are split into <600rpm, 600-1200, 1200-1800 and so on.
the issue is with the larger MAF, idle MAF voltage is around 1.18v and the 600-1200 throttle enrichment table starts at 1.92v.
when the throttle is opened to take up the clutch or similar, the AFR is dropping suddenly then cleans up as the MAF voltage rises above this point.
My question is can this voltage be changed in the table so the throttle pump works properly with the new MAF? i dont think this can be solved with the main fuel table alone as this is ignored to an extent until the throttle pump time passes.
welcome any input.
cheers
cam