i recently installed 450cc injectors in a new turbo setup on my d15b2 w/ mpfi swap. since then ive been having a tough time getting the idle to smooth out. using a chipped pm6 ecu and turboedit.

when the car comes to normal op temps it sits right about 500rpm and im getting 14.7 afr's and a -22 vac, then the afrs lean out and start climbing to around 17 and the vac drops to around -19/20.

the idle drops to about 350-400 (hard to tell on stock tach) while the leaning process occurs then once the afrs hit about 17.2, it richens to 14 or so and starts to idle smooth around 500 rpms... then the cycle starts over.

ive tried adding small amounts (+2%) fuel to the corresponding areas on the fuel map but it doesnt seem to be smoothing out the afrs or idle.

o2 disabled in boost only

anyone able to point me in the right direction? thanks
Dan

 

vac leak?

 

yeah thats what i thought

turns out my tuner adjusted my idle screw a bit out of wack and the map was too lean, when combined it made my idle ****.

i added 5% more fuel to the idle areas on the map and adjusted the idle screw to 14.7 afr's with the iacv unplugged and now its golden.

not his fault, the car wasnt in tuning shape when we did it up. ive fixed multiple issues since then.

good luck anyone else with similar problems