As title States I've had open loop detonation from 4000-4500 rpm off and on for six months. Does not detonate under closed loop and no codes. New plugs in the motor, copper ngk
Safc is set to dump 10 points of fuel at the range. It happens sometimes and other times it doesn't

Enigne temp and ambient temp have no bearing on it

Slight misfire at idle on rare occasions

Cam sensor check out fine

Any ideas?

 

Have you checkd your knock sensor/detonation sensor?

 

Remove the SAFC - does it still detonate?

 

Could be a bad injector or seals. Do you have a wideband or egt? Just checking to see if you can determine it going lean or fuel knock.

 

Coil pack? Perhaps it's on it's way out?

 

Seems like a lot of fuel to be dumping in there.

I agree, at least set the correction to 0.

I also agree, anything screwy going on at that RPM, lean/rich?

 

With correction set at zero I idle at 15.6 air and wide open at 13.4-13.8
Safc removed same issue

I'm thinking it may be my maf on its way out since the issue occurs only in open loop. Tonight it fell as if I hit the Rev limiter when accelerating past 4000 rpm

Mods btw
00vi stock injectors
Pftb
3.5'' length tuned intake similar to schmellys
headers back
Innovate lc1 wbo2
safc1

Bbmaf which was removed and tubed taken off once issue started