a friend of mine keep bugging me about his troubled car. His ride is a 4g93 DOHC. Mivec 81 mm pistons, mivec wiring,mivec ecu,mivec gearbox..let's just say that it's a complete mivec without a mivec head. it's so sad to see his ride today. it's a mess.misfiring, the setting is not quite right..and poor performance..all these due to mechanical setting and not enough fuel to support his engine( fuel pump 1.5) so, he asked me if i could do something about it. all i can do is check his problem and we spend a couple of hours setting his car, try an error and took some parts from his wife's car (she'd kill him for this,haha). We concluded that there was some problems with his fuel pump. not enough sup.8 port because his ecu is reading a 1.6 fuel mapping when it should be a 1.8. so, the least i could do is set his fuel regulator to 3.8 bar- 4.it runs fine but he should get another fuel pump i guess...