Thanks John. Might check it out, but since I dropped the gap to 0.035", the subtle backfire on ignition off has disappeared.
As for my overly rich idle, my injectors checked out fine. I suspect my AFM is on it's way out... that'll be the second AFM
I guess they just aren't designed for *any* kind of boost, especially over 1.1bar
Must get rid of that fast and go MAP sensing asap.
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition