G'Day,
Could anyone tell me what I need to do to solve the running lean problem I currently found out I have. I took my r34 (full 3" exhaust, FMIC, 12psi boost, pod in cold air box, and just got Nistune installed) to get a road tune with NIstune installed (onto my stagea DET ECU) and my tuner told me I am getting a dangerous air / fuel ratio of around 13 to 14 which I saw on his laptop, idle is around 15, so I couldnt get it tuned and was told not to rev above 2500-3000 as my engine could blow.
I have been driving like this (running lean) for 10months and was told I'm lucky that my engine hasnt blown so far lol..
Please dont ask why I have a stagea ecu in my skyline, it was there..!! But the Nistune daughterboard has the R34 maps on it.
I was told to get a Bosch 044 fuel pump as my fuel pump could be gone. But he took the time to explain to check the voltage between the modulator and pump - if its above 13V, then I need to cut the ground wire to the modulator and ground it to the chassis. If it is less than 12v, then my pump is screwed. What is this modulator, any pics of it on a R34?
I think I might as well get the fuel pump done, but R34s are still kinda 'new' how can my pump be farked?
Not only that, he adjusted my timing (tapping on the cylindrical grey metal cup object (held by 3screws) on the front of the engine timing cover) to the factory 15 degrees as it was set at 10 degrees before? Is this the way to go?
Any suggestions anyone? (My tuner is excellent, a great bloke, and takes the time to explain things, I will not name him in case some of you don't agree to his advice).
cheers