Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post

240silvia · 04-21-2018, 02:05 AM

What's up guys. On a cold start I do not get the standard "higher idle" like I should. Instead, on a cold start I get a lower idle initially and then it levels out as the engine warms up.

I purchased the car with the swap already done. I've always had this issue. It has an RS-Empathy tune so I expect the initial idle to be stingy on a cold start. Once the car is on for a few mins it sits around 750ish so I do not believe I have an issue with my IACV. I've done some research and from my findings, the FIC "Fast Idle Cam" on the throttle body plays a big role in the higher cold start idle. The engine has an aftermarket 70mm throttle body and it does not have a FIC.

So I'm curious, does everyone with a 70mm throttle body have this issue? Is there something else I should check? Any insight will be greatly appreciated. Thanks guys.

04-21-2018, 02:05 AM	#1
240silvia Nissanaholic! Join Date: Jul 2002 Location: Wilmington NC Age: 36 Posts: 2,060 Trader Rating: (3)	s14 SR Cold Start Issue What's up guys. On a cold start I do not get the standard "higher idle" like I should. Instead, on a cold start I get a lower idle initially and then it levels out as the engine warms up. I purchased the car with the swap already done. I've always had this issue. It has an RS-Empathy tune so I expect the initial idle to be stingy on a cold start. Once the car is on for a few mins it sits around 750ish so I do not believe I have an issue with my IACV. I've done some research and from my findings, the FIC "Fast Idle Cam" on the throttle body plays a big role in the higher cold start idle. The engine has an aftermarket 70mm throttle body and it does not have a FIC. So I'm curious, does everyone with a 70mm throttle body have this issue? Is there something else I should check? Any insight will be greatly appreciated. Thanks guys.