Hello! I hope you guys can shed some light on this for me...
#1 - 4WD is still not working:
I have a 1990 BNR32 GTR that I bought in February, and as far as I am guessing, the 4WD has not worked since way before then...
I found out that the 4WD meter wasn't moving a bit when the back end was spinning one rainy day, and I though to myself: WTF.
Anyway, could anyone give me some advice as to where I should start looking? The 4WD system does not work at all. There is NO 4WD light on the dash whatsoever, not on start, not on running, never - and if this is the case I believe the 4WD computer isn't even giving fault codes at the back. All fuses are fine. I have a Mines ECU.
I was sold this car as a car with 'minor mods' and "only a exhaust and airfilter"... anyways, my mechanic found a BURNT OUT Tomei HICAS lockbox under the engine recently, and so I imagine there's other stuff that's effed up? He removed the Tomei box. He then said the wiring to the ECU was shitty as well. The fluid resevoir was also topped up...
Where can I find the ATTESSA signal lights? Is it obvious to see the flashing lights? How do I start the diagnosis sequence?
#2 - Leaking differential
The rear differential is leaking on my GTR, it's only obvious when the car is at an angle, ie, it's pooling inside the case... what would cause this? I have never drifted this car or hit any hard bumps.. could this lead up to the problems with the 4WD? Or have nothing to do with it?
#3 - Not so great compression
A recent compression test revealed scores of roughly 120-123 across all cylinders. There are no vacuum leaks, what should I start to prepare for or what could be the main reason for this? All I know is that this generally means an engine rebuild will be needed in the not so distant future?
#4 - Black smoke
When I push the car a bit hard I see some smoke out the back, not lots, but enough to make it evident, is this normal? I watch lots of drag racing videos and see cars sputtering out smoke on shifts.. is this normal?
I really appreciate all your help and input with my issues... all I'm trying to do is to get my GTR to decent standards but I am struggling to do so with all these problems. If anyone in Melbourne could offer any assistance that would be cool too.
Cheers