had this happen to me a few days ago. i have 13psi/20psi on demand. while giving it some using the higher boost, i lost all power and coasted up into a faggot/dogging spot. (hence why i coasted rather than cruised). after a 70 year old pervert took me to fill my petrol can i couldnt get the car to start. looked under the bonnet to discover the boost hose has come adrift. on mfi, boost hose leaks can stop the car running altogether. check hoses are tight and not leaking. the top hose can rub on the blind side creating a leak. however id bet your hose has maybe pushed off momenterilly. how much boost are you running? i cant see the setup been an issue if jano set it up. id put the timing as was and drive steady till you find out the cause. could be a ht lead from coil to dizzy, coil, dizzy ect.