Hey guys im new to skylines australia and I know this topic has been touched many times however I havent been able to solve my problem so any advise would be much appretiated.
I have a r33 which has a ecu modifyed by sam at dr drift so the afm is located between the intercooler and the inlet plenum anyhow I have had a lot of problems with the intercooler pipe blowing off at the afm (which I think is where my problem first started) so I welded a couple of tabs on each pipe and ran a bolt on bar beside the afm to stop it from seperating, once all that was done the car now seems to have a misfire mabe? it runs a little rougher than normal at idle but seems fine to drive untill you hit boost where it coughs an splutters etc on occiasion it will boost in second gear but it over boosts.
I think the fuel pump is fine as its new and it pumps a bit of black smoke out the back while its playing up and also I have tryed a bunch of things to rectify the problem which includes- cleaning fuel filter etc, carn't find any vacume leaks, new spark plugs, pulled the coil packs off my rb26 and tryed them ( splitfires where on the car), inspected the coil harness and added an extra earth, cleaned earth's on motor, tryed a second ignitor,afm & tps, the wastegate was sticking a bit also but have since cleaned around the valve and flange so it now moves freely, I also hooked it up to the consult cable and it shows no erra's though the tps ( first one) was running at .80 volts so adjusted that to 0.45 v.
So as you can see ive had enough of this f**in pice of sh**t so if anyone can help me out here it would make my day.