SR20DET Idling problem.. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Stancyeze · 08-10-2016, 09:47 AM

Fixed this issue... somewhat. I put the stock MAF on and it idles completely fine on cold start. Once the engine heats up, it will start to idle rough and my A/F ratio at idle is in the low 10's.

The car came with a ISR 255 pump, so i'm thinking maybe the fuel pressure is too high and causing it to run way too rich which could cause the bad idle once warmed up. I have an adjustable FPR, but before I install that I was just seeing if anyone had any other suggestions.

08-10-2016, 09:47 AM	#1
Stancyeze Leaky Injector Join Date: Aug 2013 Location: Virginia Posts: 115 Trader Rating: (0) Feedback Score: 0 reviews	Fixed this issue... somewhat. I put the stock MAF on and it idles completely fine on cold start. Once the engine heats up, it will start to idle rough and my A/F ratio at idle is in the low 10's. The car came with a ISR 255 pump, so i'm thinking maybe the fuel pressure is too high and causing it to run way too rich which could cause the bad idle once warmed up. I have an adjustable FPR, but before I install that I was just seeing if anyone had any other suggestions.