Strange SES problem.

red6spd · 05-20-2012, 01:50 AM

Hay guys. So my Z has been doing good no problems to report until now. Drove her today for about a half hour with no problems then let her sit the rest of the day. At around midnight I started her back up to go for a little drive and noticed that it now had a SES light. I took it for a drive and noticed it was idling at 1k steady. Other then the high idle and light she runs fine. Any ideas before I start messing with it.

370Z JT · 05-20-2012, 02:28 AM

Pull the code.

blackonorange · 05-20-2012, 03:29 AM

See what the code is

red6spd · 05-20-2012, 09:33 AM

Yea that's my next step. Just woke up lol.

6MT · 05-20-2012, 10:04 AM

Probably the rear o2 sensor code.

red6spd · 05-20-2012, 10:21 AM

Was not expecting that. PO300 random multiple misfire twice????? I/M monitors where all ok. Strange. I cleared the code and the car is now idling properly.

Red__Zed · 05-21-2012, 11:21 AM

You are likely running rich, or there is an issue with the o2 sensors.

Couple things that would be helpful to know:

-How long has your car been out from winter storage? Time / miles?
-have your AFR chart from your dyno run? What was the weather like then, vs when you threw the code?

You may also check for a vacuum leak.

SS_Firehawk · 05-21-2012, 11:27 AM

I would make sure your G3's aren't leaking anywhere as well. If they are, your ECU will be feeding it tons of fuel trying to fix it's self.

red6spd · 05-21-2012, 11:57 AM

Car has been out of the garage for about 3 months and I put a little less then 2k miles on it. The temps where probably around the same maybe colder when the car was dynoed, but its been over a year since the dyno was done. As for the vacuum leak and leaking intakes, the car idles normal since I cleared the code. Wouldn't it still idle high if there was a leak of some sort? I drove the car maybe 10-20 miles yesterday so far so good, once the rain stops I will continue driving it to see if the SES light comes back on.

I plan on getting the car dynoed again soon anyway so I can check for proper AFR then.

05-20-2012, 01:50 AM	#1 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 21	Strange SES problem. Hay guys. So my Z has been doing good no problems to report until now. Drove her today for about a half hour with no problems then let her sit the rest of the day. At around midnight I started her back up to go for a little drive and noticed that it now had a SES light. I took it for a drive and noticed it was idling at 1k steady. Other then the high idle and light she runs fine. Any ideas before I start messing with it. __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time)

05-20-2012, 02:28 AM	#2 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 379	Pull the code. __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

05-20-2012, 09:33 AM	#4 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 21	Yea that's my next step. Just woke up lol. __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time)

05-20-2012, 10:04 AM	#5 (permalink)
6MT A True Z Fanatic Join Date: May 2009 Location: ITU Zone 2 Posts: 22,459 Drives: Reliant Robin Rep Power: 1790	Probably the rear o2 sensor code. __________________ Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D

05-20-2012, 10:21 AM	#6 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 21	Was not expecting that. PO300 random multiple misfire twice????? I/M monitors where all ok. Strange. I cleared the code and the car is now idling properly. __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time)

05-20-2012, 03:29 AM	#3 (permalink)
blackonorange A True Z Fanatic Join Date: Jul 2011 Location: Saskatchewan Posts: 1,078 Drives: 09 370z Rep Power: 16	See what the code is

05-21-2012, 11:21 AM	#7 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 120	You are likely running rich, or there is an issue with the o2 sensors. Couple things that would be helpful to know: -How long has your car been out from winter storage? Time / miles? -have your AFR chart from your dyno run? What was the weather like then, vs when you threw the code? You may also check for a vacuum leak.

05-21-2012, 11:27 AM	#8 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	I would make sure your G3's aren't leaking anywhere as well. If they are, your ECU will be feeding it tons of fuel trying to fix it's self. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

05-21-2012, 11:57 AM	#9 (permalink)
red6spd A True Z Fanatic Join Date: Apr 2010 Location: Long Island NY Posts: 3,277 Drives: 2010 Z Coupe M6 SPT Rep Power: 21	Car has been out of the garage for about 3 months and I put a little less then 2k miles on it. The temps where probably around the same maybe colder when the car was dynoed, but its been over a year since the dyno was done. As for the vacuum leak and leaking intakes, the car idles normal since I cleared the code. Wouldn't it still idle high if there was a leak of some sort? I drove the car maybe 10-20 miles yesterday so far so good, once the rain stops I will continue driving it to see if the SES light comes back on. I plan on getting the car dynoed again soon anyway so I can check for proper AFR then. __________________ 2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness. ???Whp ???WTQ (Will find out come spring time) Last edited by red6spd; 05-21-2012 at 12:00 PM.

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