Fitted a engine about a month or so ago that I bought off a reputable member on here, it was working fine and saw it running before he removed it,
ever since I fitted it, when I start try to start it I can only get it to start if I put foot to floor while turning over, and then it starts, revs to 3000 on its own for a few seconds and dies, also while turning it over I occasionally get a sort of quietish "piff" sounding backfire from the engine bay, and no other combination of choke/throttle can get it to start
this is what I have tried so far
fitted new leads, plugs, rotor and dizzy cap
fitted new tdc sensor
fitted 3x different aei's
swapped fuel pump
swapped fuel pressure reg
swapped carb
fitted new carb base gasket
fitted new fuel pump relay
drained tank and filled with fresh fuel
all the above makes no difference, and it still has the exact same problem, it has a good spark, and plenty fuel, with good pressure, and the few seconds it runs it sounds ok
Im totally feckked off with it now and seriously thinking of selling up, in the 3 years i have own car I have driven it 3 times