Rb25 idle surge after motor pull and reinstall - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Brok3n_RB25 · 04-24-2011, 11:26 PM

I recently pulled my motor for a transmission issue. I just reinstalled everything exactly how it was before. Ive done all the work on this car myself and it ran great before. Now I start the car and the idle surges from about 1300 to 2800 rpm. The throttle is extremely sensitive. I was thinking it was possibly a vacuum leak, but when I touched the throttle to try and hold the rpm up a bit to remove vacuum as a possibilty it jumped to 4500 rpm with barely any throttle. The tps sensor is showing .46v closed and 4.6v open. I'm stumped. So, its not a vacuum leak and its not the tps. What other problems could I be looking at?

rbpowerd · 05-29-2011, 05:33 PM

Just wondering if you had luck finding a solution. I have the exact same problem and cant find a solution.
any help would be greatly appreciated

04-24-2011, 11:26 PM	#1
Brok3n_RB25 Join Date: Dec 2009 Location: Northwest Florida Posts: 48 Trader Rating: (0) Feedback Score: 0 reviews	Rb25 idle surge after motor pull and reinstall I recently pulled my motor for a transmission issue. I just reinstalled everything exactly how it was before. Ive done all the work on this car myself and it ran great before. Now I start the car and the idle surges from about 1300 to 2800 rpm. The throttle is extremely sensitive. I was thinking it was possibly a vacuum leak, but when I touched the throttle to try and hold the rpm up a bit to remove vacuum as a possibilty it jumped to 4500 rpm with barely any throttle. The tps sensor is showing .46v closed and 4.6v open. I'm stumped. So, its not a vacuum leak and its not the tps. What other problems could I be looking at?

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05-29-2011, 05:33 PM	#2
rbpowerd Join Date: May 2011 Location: Wisconsin Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	Just wondering if you had luck finding a solution. I have the exact same problem and cant find a solution. any help would be greatly appreciated