Idling issue... have tried various things - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

enixxi · 02-02-2010, 11:24 AM

Hey, I have an s13 with a redtop sr20, blitz fmic, 3 in turbo back. I just moved to arizona and drove the car all the way out with no issue, but after a few days my car's idle started stumbling. What would happen is I would drive the car around normally untill around operating temp. which according to the gauge is under 80 C. Once it was warmed up it would run and boost fine, but the idle would stumble and the car would shut down. It would fluctuate between 0-900 rpm almost shutting down or actually shutting off.

At this point I tightened up all the intercooler piping, replaced the vacuum hoses and made sure my maf sensor was well grounded. After the intercooler piping and vacuum hoses were replaced the car stopped shutting down. Now 3 different things can happen when the car is idling.

1) It idles fine
2) The rpm drops to about 200-300rpm and my fpr gauge reads 10.0
3) the rpm fluctuates between 0-900 rpm almost shutting off, but barely staying on

These symptoms occur randomly during the same driving session with the fluctuating idle being the most common. The last thing I've tried is switching O2 sensor's with my buddy's O2 sensor and the same thing still happens. Has anyone had similar problems or have an idea as to what can be wrong?

02-02-2010, 11:24 AM	#1
enixxi Join Date: Jun 2009 Location: tucson, AZ Age: 35 Posts: 43 Trader Rating: (0) Feedback Score: 0 reviews	Idling issue... have tried various things Hey, I have an s13 with a redtop sr20, blitz fmic, 3 in turbo back. I just moved to arizona and drove the car all the way out with no issue, but after a few days my car's idle started stumbling. What would happen is I would drive the car around normally untill around operating temp. which according to the gauge is under 80 C. Once it was warmed up it would run and boost fine, but the idle would stumble and the car would shut down. It would fluctuate between 0-900 rpm almost shutting down or actually shutting off. At this point I tightened up all the intercooler piping, replaced the vacuum hoses and made sure my maf sensor was well grounded. After the intercooler piping and vacuum hoses were replaced the car stopped shutting down. Now 3 different things can happen when the car is idling. 1) It idles fine 2) The rpm drops to about 200-300rpm and my fpr gauge reads 10.0 3) the rpm fluctuates between 0-900 rpm almost shutting off, but barely staying on These symptoms occur randomly during the same driving session with the fluctuating idle being the most common. The last thing I've tried is switching O2 sensor's with my buddy's O2 sensor and the same thing still happens. Has anyone had similar problems or have an idea as to what can be wrong?