kennys64

help . myself and a friend have been tuning my lq9 nova for some time using efi live .speed density tune. car runs great other than.idle surges very bad as soon as pcm sees wheelspeed.cant figure it out.i back out of garage in morn creeping 1mph no surge .2mph seems like pcm goes into diff mode.idle surges miserably .i disconnected the vss this morning . car no longer shifts but idle is great. please help.is there an adaptive idle or something i can turn off or adjust.also if i am pulling up to a stop. it is smooth until i almost stop then it surges rediculously embarrassing.almost stalls.then catches on idles smooth if it doesnt stall .veh does have a med cam and maggie.i dont think these are the cnc.though.it is pcm related to wheelspeed.

kennys64

any one. help suggestions.

BLK02WS6

iTrader: (2)

Post your tune and I'll take a look at it...

kennys64

ill have to look into that .i do not have the tune .tonight we adjusted the cracker idle and it is much better .it is amazing the variables in a tune.thanks

jakebdb56

iTrader: (25)

Sounds like adaptive idle RPM disabling once it sees the predetermined MPH cutoff. Fine tuning idle to where it "should" be will help a ton.