Yes I do have a problem, I have been chasing down a misfire that occurs at 25psi. it is fine at 22psi. I have tested and changed all sensor and ignition amp/dizzy cap/leads/rotor arm/plugs IK27. I have recently replaced the phase sensor(Yet to test) I have also tried a MSD cal6 ignition amp but still does it!
I put a relay in for ignition positive using original as trigger taking 14volt direct off battery plus replaced alternator battery charge cable.
I am now looking at the gap clearance on crankshaft pulley lugs as I only checked in on one lug so maybe it differs across the four.
The fueling is fine as I have a wideband system in car the pump is getting a healthy voltage on boost as i have upgraded wiring/relay on that to.

Bit of a mystery really.


Thanks all.

Tim.