10.5:1
2.0
zzp stage 3 cams
tvs
stock throttle body
80s

idle jumps a little at temp with the maf within 5%.

also timing hits -4 - 0 when idle smooths out.

playing with the scaler 2750-2950, over/under speed tables... it smooths out for a sec holds 16* advance, but keeps falling back into negative advance.

 

small vac leak?

 

uh oh, not this again. You already try messing with your idle tables Im assuming?

On a mechanical side, I have had something similar happen when my injectors were stuck open, always something to check, but unlikely

 

its either a vacuum leak or its in the tune do a boost leak test i had the same problems on zzp cams as well

 

try the under/overspeed tables from HPT forums?

 

I got it

these cams don't like to idle in positive advance below 1100 rpm.

messed with the scaler and min/max settings.

holds a steady idle now at 10* base idle

 

Glad to hear.