Surging l, but not at idle
Surging l, but not at idle Aloha gang.
Have cam headers and intake. Using stock 85mm MAF and stock homeported tbody. 6 speed. My car idles good at a stop, but if I'm say, in a parking lot or traffic, I will start off in first gear, get rolling at say 5 to 10 MPH, take it out of gear and coast. The idle will surge , or cycle from 825 to 1200, if i coast long enough, it will settle at 825 where its set. But its annoying if i have to put it in and out of gear like cruising thru a parking lot, because it will just cycle everytime I'm coasting because I only coast for a few seconds, then back in gear. Using HP tuner
Thanks for any advise
Have cam headers and intake. Using stock 85mm MAF and stock homeported tbody. 6 speed. My car idles good at a stop, but if I'm say, in a parking lot or traffic, I will start off in first gear, get rolling at say 5 to 10 MPH, take it out of gear and coast. The idle will surge , or cycle from 825 to 1200, if i coast long enough, it will settle at 825 where its set. But its annoying if i have to put it in and out of gear like cruising thru a parking lot, because it will just cycle everytime I'm coasting because I only coast for a few seconds, then back in gear. Using HP tuner
Thanks for any advise
I would look to the throttle cracker, it modulates the
idle airflow based on rolling speed and I've seen some
tunes with crazy "divots" in the map.
I also have a bit of surge at light pedal, which seems
to come from a MAP-axis error in the VE table; I call it
"fuel surge" for want of a better idea. When you're not
at idle, you don't have the adaptive spark and the RPM
control loop to cover that up.
idle airflow based on rolling speed and I've seen some
tunes with crazy "divots" in the map.
I also have a bit of surge at light pedal, which seems
to come from a MAP-axis error in the VE table; I call it
"fuel surge" for want of a better idea. When you're not
at idle, you don't have the adaptive spark and the RPM
control loop to cover that up.
