Hi there first time post.
TL;DR Everything works good, specialist said that not enough fuel going into engine during spool/boost, is it common problem/suggested fix?
I currently have just bought an R33 GTST 1994 Skyline. And it drives great, I took it to a few mechanics and all have said its very very clean. It's only done 94000kms. One mechanic said he suggested new spark plugs and a 2 rocket gasket covers. So I got those done, only about 400 for the lot with labour. But I keep feeling there is power loss, I tried to explain to the mechanic but he said it was just me.
What I explained was that it felt like I could hear the turbo spool, but there was no power, for some reason it just felt like it was taking years for it go from 3000rpm to 6500rpm (7000 is my redline). Just felt slow. Mechanic said I was just thinking things. At first I thought it was boost leak, but he checked all hoses and piping, no leaks, the boost gauge also registers perfect as it should, all the way upto 11psi no jumping or anything.
The car has no misfire or idle problems. But recently a "specialist" who has owned one said that I was indeed right, there was something wrong with it. He said that he thinks up until 3000rpm, til before the turbo spools it drives good, but after that he thinks there isnt enough fuel going through, he said he checked my fuel pump and it was working, there just wasn't any flow. He also mentioned and i have seen this before, usually when similar skylines put the foot down you see more black smoke come out the exhaust because of the higher fuel flow, but mine doesn't get anymore smoke come out. So he suggested I might need to check my fuel pressure at the front where my engine is, get a tune, and possibly might need a new ECU.
The car has an aftermarket exhaust, just a hi-flow, not very big mufflers, I didn't put it in so I'm not quite sure 100% what brand or size it is. But it has an electronic valve controller as well, I don't know how to use it, it has a lot of possible settings, and was also curious if anyone knew anything about it? Could it control my fuel flow? here is some pictures of it, and all its settings - http://imgur.com/a/YsAwf is while the car is idling, and just pushing PWR to turn it on, and then mode to go through the set settings).
And also my HICAS light is on, but god knows what that could be.
Is there a way I can fix this without making it cost $3000+? Or is my mechanic wrong and should I look for/ask for something else? Maybe I should take it to a tune shop and get a second opinion.
