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I just got my RB25 started up in my 240sx with 3" straight pipe at 1am on Good Friday.

The idle is a little rough and seems to rev up after a few seconds of idle. I didnt keep it going too long once it started revving up.

My thinking is that the throttle body is wrong. I have a Q45 Throttle body and was wondering if there was a difference in the TPS sensor over generations of the Q45. It seems like the car revs up real quick when the Throttle is even cracked.

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https://www.sau.com.au/forums/topic/314881-rb25-in-240-started-up-rough-idle/
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I got the engine to idle smoothly now. Messing around with nailing down a few more things, hopefully it will be road worthy in a few hours.

Adjusted stock cable and it works well, idles sounds about 1000-1200, need to mess around with a few more things to get it road worthy

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