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Unknown Dial Under Steering Wheel

Paymh
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Paymh Apprentice

Paymh

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Hello,

Recently bought a r33 gtst s1 knowing it had a fair few issues. I'm trying to fix everything up but I've come across this little black box spliced into the main wiring under the steering wheel / above the pedals. It has no branding on it other than a model number (40ae018294111, which turns up nothing), and a white turn dial. There's also a black box above it which is ziptied, not sure what that is either. The previous owner has no idea what it is as he never got it running correctly either. Checking the history it seems to have boost gauges/controllers added / removed multiple times so its a bit of a spaghetti inside and outside the car. Here's some images of it (they are awful sorry!) - http://imgur.com/a/b8vv9

It's hooked up to a red,black,white cable, obviously power,ground + other. I checked the wiring diagram but couldn't figure it out myself, any help would be appreciated if possible. As well as the main running issue being it won't rev above 2,500rpm without severe misfiring. I assume its the coils, since 4 are OEM and 2 are from an rb20, but if you have any other ideas other than the usual AAC valve, spark plugs etc, that would be sweet as well!

Thanks

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Paymh Apprentice

Paymh

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Right right, that makes more sense. Cheers guys. Rather than making a new thread, any ideas about a very loud screeching at clockwise full lock. That would be an overly tight power steering pump tensioner right? Since it's stock suspension that should rule out body rubbing, but it definitely sounds more mechanical. Is my assumption correct?

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