Slow89Iroc-Z

Mods in sig...off idle to about 2000rpm the car seems st lay down...its has a tip in bog...that will stay with it till about 2k. If I accelerate slowly like in normal driving the car seems like it has no power. The map readings are in the low 40-45kpa and the spark advance is around 30degrees. I did a scan the the blms are right around 128 when it does this.

Low C1500

Sounds like you need to play around with you accel enrichment values

lakeffect2

I'm noticing a similar light acceleration bog. Simply stuff like normal movement away from traffic lights produces a hesitation or bog. I've been playing with AE Asynch vs TPS and it has seemed to help some, but only by the Butt-o-Meter testing. (using Tunerpro RT and a $8D mask to program)

I still feel like a don't have a good handle on what I think you guys are referring to when people speak of "tip in" issues. I'm equating it to a similar term, "pump shot" from carb terminology. I'm not even sure if I'm using proper terminology to do a good search by, or I'm having a very thick senior moment.

Ronny

iTrader: (1)

You need more pumpshot aka acceleration enrichment. what are the AE modiifiers your definition file shows? Ideally you would add more at that RPM with an AE RPM modifier. If none showing use %TPS maybe 5-10-15% area only of TPS. I would add in increments of 5% and see how car responds

RBob

iTrader: (1)

> Mods: OBDII, 383ci ZZ4 short block, Comp Cams custom XFI cam, TrickFlow CNC Ported

More information is required. Mostly which ECM and MaskID is being used.

RBob.

lakeffect2

I'm in Tunerpro RT on an $8d mask for 730 ecm using SAUJP_V4 and in the constants/scalar section, I'm seeing
"AE, number of DRP's to use the MSB of table 53B (pumpshot)"

The constant it refers to when the box is opened has a value of 3. I have no idea what a DRP or MSB is, and if agreater vale like 4 or 5 would be helpful.

I also see an entry in the table/function section listed as "AE, filter coefficient vs RPM"

Everything in that table, listing increments of 400 rpm (correlated to RPM tables) has a value of 0.063. There is no variation in value anywhere on the chart. Are you indicating this coefficent value should be increased from 400 to 1200 RPM (give or take an entry or two)
I'm thinking more at the 800-1200 rpm point like 10%, where the biggest stutter is. 5% at 1600-2000 where there is less issue, back to 0% change above that. Sound reasonable?