locrzn

iTrader: (9)

I just changed from a 4.8 to 6.0 ly6 with ported l92 heads, cam is .604-617 lift and 225-233 duration on 112 lsa. Long tubes, 3000 stall. Car runs pretty good, I'm keeping it pretty tame till I get my new fuel system installed along with the holley hi ram. Right now I'm running the l92 truck intake on stock 33lb injectors. The problem I'm having is when I'm letting off, like coming to a stop sign the motor wants to die. Once I'm stopped it idles great in or out of gear. I'm pretty new at tuning and kinda creeping up on it. I've got the tranny shifting pretty good and the converter locking up as it should, maybe a little earlier then it should but thats not really the issue I'm dealing with. I'm not sure what to tackle in the tune to fix the problem. No vaccum issues at all, motor is very strong although I havent' come close to wot throttle yet since the fuel system is not ready for that. Any assistance would be great, I'm using hp tuners

thanks greg

wild1100

iTrader: (3)

What is you idle rpm.

locrzn

iTrader: (9)

800 in and out of gear with this cam all the way thru the coolant range.

flywheel

iTrader: (2)

TPS maybe.

locrzn

iTrader: (9)

Throttle position sensor is what I thought, just not sure how to adjust it.

psi3000

Is your brake switch / brake pin for the ECU hooked up and functioning ? As if its only when you apply the brakes and then idles fine when your stopped I wou
ld think it would be the brake switch not getting the signal that you are braking. Don't quote me on this but I think you can test it by grounding it out.

bmax

iTrader: (1)

Try adding to the throttle cracker tables at the rpms/mph you are having problems. May have to work with the cracker decay table to fine tune it after you get it sorted.

Good luck

Brad

locrzn

iTrader: (9)

Brad where is that located in hp tuners, mine is drive by wire also and not cable. Its just that 100-150 rpm range where it does it.

locrzn

iTrader: (9)

Ok, got my problem taken care of. I had some help from a tuner, but we figured it out. I went into the idle, airflow, base minimum vs airflow vs gear. I bumped up the current numbers at 1000 rpm and 1200 rpm and reloaded those into my hp tuners flashed it and its working perfect. Didn't really like keeping my foot on the throttle when coming up to a stop sign.

TXjeepTJ

iTrader: (8)

Hate to bring this back from the dead but it's better than starting a new thread

I don't have a base minimum vs airflow vs gear on my HPtuners.. all I have is Base Running Airflow and it isn't plotted against RPM - it's only airflow based on coolant temperature

?????? Or is this the table you meant?

2002_Z28_Six_Speed

iTrader: (19)

Base airflow is just a starting point. You will probably have to play with throttle cracker, follower, and timing to get to to work. Make sure you have enough airflow everywhere and there are no big swings between adjacent cells.

I went overboard by upping to like 10 grams base airflow and then slowly backed it off over weeks to find a sweet spot. RAFIG never seemed to go to 0 for me.