i just fixed hks 272 cams and valve spring,fse fuel regulator and power enterprise 1.2mm head gasket.at 1st the car run normally but the next day the car got problem.when idling the car will stop itself.then restart it,it will become normal.but when start to move the car will jerk.when check the fuel pressure gauge at the fuel regulator the pressure drop to zero whenever it start to stop.just like there was no fuel supply to the engine.i thought the fuel pump failed so i change a walbro 255 fuel pump.the problem still the same.

any idea wats the problem?

sorry for my bad english

 

problem solved

fuel filter failed

but now the car run seriously lag

how?