[Diy_efi] Timing Retarded without knock

[Terminal Crazy]

Hi

I've just installed a CC XFI 268 Roller cam in '95 Z28 LT1 with CC Roller
Rockers.
LT4 Timing Chain


I've found my EGR Valve not functioning but the vac hose is capped off.

I drives ok but now requires tuning.
I've done a log and am getting small amounts of retard showing without the
knock counts increasing ( upto 2-3 degrees)

Knock picked up off the exhaust does retard it a lot more but is visible in
the knock counts.

Where would I start chasing this ?

Thanks

-- 
Terminal_Crazy

Mitch - 1995 Z28 LT1 M6          terminal_crazy at sand-hill.freeserve.co.uk
Lancashire England          http://www.sand-hill.freeserve.co.uk/terminal_crazy/