Hello people, I have completed my 4age set up on my ke30 72, after the wiring was done started the car and revved completely normally for the 1st 2 days, and suddenly started misfiring...then here is the messed up part... it cant rev more than 3K and is struggling missfiring like anything...and it missfires from the INTAKE MANIFOLD as well... I am poo worried, what do I do to solve this..immediate help will be appreciated!!

Misfiring from the intake sounds like the timing is way off, but mechanical breakages like a burnt out valve can cause this as well, lets hope it is the timing!

checked the timing and it seemed fine,do u think there maybe problems with the injectors or does this happen when the engine is running rich or running lean?

Could be a number of things, have you checked the spark timing AND the mechanical timing?

uhmm nope...sorry i may sound dumb but i have no clue how to check them or set them right...help me maybe :e

I never considered that the cam timing could be out - that would certainly do it - perhaps the belt tensioner has slipped?