Help with tune 383 LT1

**johnny_b** · 12-12-2016

Originally Posted by Terminal_Crazy

Idle was going lean when going into CL.

right, valve overlap from the cam corrupting the O2 sensor readings at idle. Sorry Mitch maybe you misunderstood me, what I'm curious about if i understood you correctly, is why the OL idle patch was causing you to go lean at low throttle settings?

**Terminal_Crazy** · 12-13-2016

Originally Posted by johnny_b

right, valve overlap from the cam corrupting the O2 sensor readings at idle. Sorry Mitch maybe you misunderstood me, what I'm curious about if i understood you correctly, is why the OL idle patch was causing you to go lean at low throttle settings?

Idle i'd got running well.
CL the idle was lean and raggedy. Off idle was going very lean any time the throttle was opened upto 25-30mph.
I tried the CL PE idle which was vastly improved but was very rich as it was set up.
I've just gone OL SD instead and need to relog & reflow my VE Tables.

Mitch