Making a Q45 TB work on an S2 RB25DET

Discuss the RB20, RB25 and RB26 series engines.
streeteg
Posts: 395
Joined: Sat Mar 31, 2007 2:58 am

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Ok, so the most frustrating part of the build so far has been trying to find a TPS sensor for my car. I have an S2 RB25det which was bone stock from the get go with the exception of exhaust that I am not in the process of upgrading with minor bolt ons before the winter. As I did the Greddy Intake manifold, I replaced the throttle body with a Q45 unit that has been the most annoying thing on the planet trying to get to work.

Heres why:

So long story short none of them fit and I have no idea how to hardwire it or which one to use if I were to hardwire it.


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eh?
Posts: 1781
Joined: Sat Jan 24, 2004 2:26 pm

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(Q45 TPS) to harness

(Red) to yellow/black(white) to red/blue(black) to black/blue

Just splice and be done wit it. IF you want set the key to on and verify 5 volts at yellow/black wire.

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HOMEMADE240SXTURBO
Posts: 238
Joined: Sun Sep 03, 2006 2:51 pm
Car: 1989 NISSAN 240SX KA24E
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nice

streeteg
Posts: 395
Joined: Sat Mar 31, 2007 2:58 am

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eh? wrote:(Q45 TPS) to harness

(Red) to yellow/black(white) to red/blue(black) to black/blue

Just splice and be done wit it. IF you want set the key to on and verify 5 volts at yellow/black wire.
YOU ARE THE MAN. GOD I searched for years for that ****. Thank you.

Darius
Posts: 4820
Joined: Sun Mar 02, 2003 9:48 am
Car: RB25DET S14 - 665 WHP (SOLD)
Location: Chicagoland

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yeah - eh? is the man.

bauchrb
Posts: 36
Joined: Wed May 23, 2007 8:04 am
Car: s13 w/ RB25 Gt4094r 640cc inj. AEM EMS

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alright, So I read 5 volts on both red and white wires. I've grounded the signal wire somewhere I'm guessing. It's throwing my PFC for a loop, it shuts down every time I rev past half throttle. Anyone else had something like this happen. I'm gonna trace the wires tonight, if I can to see where I might have blundered...

2lua
Posts: 63
Joined: Wed Jan 19, 2005 4:31 pm

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is it suspose to be .45volt to .5 volt??? eh?

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eh?
Posts: 1781
Joined: Sat Jan 24, 2004 2:26 pm

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yes .4v to .5v

leigh
Posts: 2
Joined: Sun Feb 21, 2010 12:50 am
Car: 1998 R33 GTST

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eh? wrote:(Q45 TPS) to harness

(Red) to yellow/black(white) to red/blue(black) to black/blue

Just splice and be done wit it. IF you want set the key to on and verify 5 volts at yellow/black wire.
With the series 2, they have 2 plugs, how is the second plug wired up?

b00stinbmx
Posts: 158
Joined: Tue Dec 23, 2008 5:23 pm
Car: 1990 240sx hatch rb25det. drift slut

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you don;t need to worry about that plug. it goes to one of the big white plugs near the ecu that aren't used.

leigh
Posts: 2
Joined: Sun Feb 21, 2010 12:50 am
Car: 1998 R33 GTST

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b00stinbmx wrote:you don;t need to worry about that plug. it goes to one of the big white plugs near the ecu that aren't used.
thanks


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