CEL and no acceleration

NissanZ34 · 07-19-2021, 07:17 PM

Quote:

Originally Posted by redondoaveb

You'd have to send them your tune and hopefully your tuner didn't lock his tune. Are you on Facebook? Contact Eugene Turkov

Then it won't be possible since he tuned the car on the dyno and flashed it there. Again, could another tuner use data logging on an already tuned for my current mods car to speed up the creation of another tune?

redondoaveb · 07-19-2021, 07:20 PM

Quote:

Originally Posted by NissanZ34

Then it won't be possible since he tuned the car on the dyno and flashed it there. Again, could another tuner use data logging on an already tuned for my current mods car to speed up the creation of another tune?

I added the name and phone number to a tuner in my above post. Give Eugene a call. If anyone can help you, he can.

NissanZ34 · 07-23-2021, 07:30 PM

Went to the dealership and the technician verified the harness and it's working. o2 sensor wiring is good too, but the problem may be the o2 sensors themselves (both of them). That or it could be a damaged ECU or a flawed tune. Remind you the tunner wanted to deactivate o2 sensor reading to bypass the issue. Could my problem really be two broken o2 sensors? The technician told me it's very unusual to have both o2 sensor break at the same time.

As for testing the car after the dealership appointment, on cold start temperature the power was back but as soon as the engine gained some temperature it got slow again. I also got the service engine light soon flashing for a brief moment when trying to get to max rpm in 4th gear. The light disappeared as soon as I let off throttle. The technician told me the computer does not read o2 sensor data when the engine is cold but will do once it gets warmer. I think I also got in limp mode because I could barely get to 3000 rpm at one point.

So do you guys think the problem really is the o2 sensors? Dealer will happily sell me OEM sensors but will not accept any return on electronic parts so I must be certain otherwise I'll be stuck with them.

redondoaveb · 07-23-2021, 07:35 PM

I assume you didn't call the tuner I recommended in my above post?

NissanZ34 · 07-23-2021, 07:50 PM

Quote:

Originally Posted by redondoaveb

I assume you didn't call the tuner I recommended in my above post?

I just contacted him on FB now. I wanted to have more troubleshooting done at first to eliminate common faults before contacting a tuner to help me figure it out even further.

redondoaveb · 07-23-2021, 08:02 PM

Quote:

Originally Posted by NissanZ34

I just contacted him on FB now. I wanted to have more troubleshooting done at first to eliminate common faults before contacting a tuner to help me figure it out even further.

The good thing about him is he'll help you troubleshoot

NissanZ34 · 07-23-2021, 08:07 PM

Quote:

Originally Posted by redondoaveb

The good thing about him is he'll help you troubleshoot

Yes he does want to help me! I just talked to him and he thinks the problem is more than likely in the tune. He would check out my data logs and even send me a stock tune file. Thank you for recommending me Eugene Turkov, he really seems like a nice guy. I think I'm in good hands now.

Rusty · 07-23-2021, 08:08 PM

Remove the tune and see if the problem is still there.

Do you have test pipes?

NissanZ34 · 07-30-2021, 09:36 AM

Changed the o2 sensors, cleaned the throttle bodies, cleaned the MAF sensors, cleaned the air filters and it's still happening.

JARblue · 07-30-2021, 09:46 AM

Everything in this thread I've read seems to point towards something in the tune being the issue

redondoaveb · 07-30-2021, 10:45 AM

Quote:

Originally Posted by JARblue

Everything in this thread I've read seems to point towards something in the tune being the issue

That was suggested in the second post

NissanZ34 · 08-11-2021, 07:02 PM

The original tuner made things right and richened up the AFR. He also disabled secondary o2 sensors. Car is a bit less snappy but does not pull timing anymore.

07-23-2021, 07:35 PM	#4 (permalink)
redondoaveb A True Z Fanatic Join Date: Apr 2017 Location: So. Commiefornia Posts: 6,379 Drives: 2014 Nismo Gunmetal Rep Power: 2684375	I assume you didn't call the tuner I recommended in my above post? __________________ Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo 750whp/700ft.lbs

07-23-2021, 08:08 PM	#8 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,428 Drives: 2011 Nismo GM 6M Rep Power: 2684438	Remove the tune and see if the problem is still there. Do you have test pipes? redondoaveb likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

07-30-2021, 09:46 AM	#10 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 44 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684441	Everything in this thread I've read seems to point towards something in the tune being the issue redondoaveb likes this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

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07-23-2021, 07:30 PM	#3 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 6	Went to the dealership and the technician verified the harness and it's working. o2 sensor wiring is good too, but the problem may be the o2 sensors themselves (both of them). That or it could be a damaged ECU or a flawed tune. Remind you the tunner wanted to deactivate o2 sensor reading to bypass the issue. Could my problem really be two broken o2 sensors? The technician told me it's very unusual to have both o2 sensor break at the same time. As for testing the car after the dealership appointment, on cold start temperature the power was back but as soon as the engine gained some temperature it got slow again. I also got the service engine light soon flashing for a brief moment when trying to get to max rpm in 4th gear. The light disappeared as soon as I let off throttle. The technician told me the computer does not read o2 sensor data when the engine is cold but will do once it gets warmer. I think I also got in limp mode because I could barely get to 3000 rpm at one point. So do you guys think the problem really is the o2 sensors? Dealer will happily sell me OEM sensors but will not accept any return on electronic parts so I must be certain otherwise I'll be stuck with them.

07-30-2021, 09:36 AM	#9 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 6	Changed the o2 sensors, cleaned the throttle bodies, cleaned the MAF sensors, cleaned the air filters and it's still happening.

08-11-2021, 07:02 PM	#12 (permalink)
NissanZ34 Base Member Join Date: Jun 2019 Location: Canada Posts: 92 Drives: 2010 370z 6MT Rep Power: 6	The original tuner made things right and richened up the AFR. He also disabled secondary o2 sensors. Car is a bit less snappy but does not pull timing anymore.