Rb30 Just Wont Run Properly

[meatsak1254]

ok i hav replaced distributor cap n rotor, leads, plugs, fuel filter, crank angle and mass flow meter and the problem just gets a lil bit better but a lil diffrent at the same time. now sometimes it will run like a dream a but as soon as the engine is under load i can smell unburnt fuel real bad now occasionally while idling it kinda drops tryna stall n if i accelerat itl run like shit with a tinge of black smoke but after sum reving will come right again. in this last day or 2 iv been just driving along and it dies acceleration doesnt work , stinks of fuel until it stops then after a min will start and drive no problem until it decides 2 happen again completely at random....anyone please got any ideas im about 2 maybe replace the power transistor next 2 the distributor as iv noticed it getting rather hot but iv only had it six months and just cant seem 2 get it running smooth all the time

[0t1]

kia ora, Could be a vacumn or leak in the intake manifold, try reset the ECU by disconnecting the battery. Is it turbo? or, lowered.

AAC valve could be dirty causing ECU to richen up

Cold idle sensor

If it's a A, C or R chassis and lowered you could have stripped a few wires under the front guards.

Cheers

[meatsak1254]

hey bro nah non turbot not lowered..yet do you think it would be a leak seeming it all happens so randomly its had these random problems since i got it the old fulla i got it off had no clue what was wrong all iv modified is replaced leaking exhaust manifold with extractor/headers its got me f**ked

[LayneGXE]

Try going on the http://forum.r31skylineclub.com/index.php

Will probably have more luck there man!

[iseekool]

This sounds similar to this --> http://www.skylinesaustralia.com/forums/topic/406478-help-rb25de-problem/

[meatsak1254]

cheers guys

[meatsak1254]

hey i dont kno anythin bout this but i noticed the air regulator wiring connection was loose and wether she b hot or cold it makes no difference at all to the engin wether its connected or not. could this b my problem ???

[meatsak1254]

basically the same wiv the AAC doesnt run much different at idle wv it disconnectd after reseting ecu not that i shud test it like that. would these make it lose power at higher revs and make it do wat it does though.....heaps confused

[Richard.W]

Similar to my 25de problem, but at the same time completely different, mine doesn't blow smoke nor does it smell of unburnt fuel! I agree with above maybe try checking for a vacuum/leak in the intake manifold??

[meatsak1254]

yea like 80% of the time it runs sweet goes hard but then it does it n seems 2 lose power round 4000rpm kinda lags its so intermittent n random makes me think its a sensor rather than leak. im up every day early hours pissin round wv it its shit. i got a bosch afm 4 mine from my x sparky seems 2 work fine. and try that link just above your 1 4 your kar there heaps ov info on thea.