I have been trying to diagnose my random misfire issues and yes my code scanner is showing me misfires on all cylinders. However, my bank 1 cylinders have about 3x
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04-26-2021, 05:22 PM | #1 (permalink) |
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Join Date: Dec 2019
Location: California
Posts: 66
Drives: 2014 SC 370z
Rep Power: 5 |
Catalyst sensor not working?
I have been trying to diagnose my random misfire issues and yes my code scanner is showing me misfires on all cylinders. However, my bank 1 cylinders have about 3x as many misfires on them as my bank 2 cylinders. I was looking over the freeze frame data today I see SHRTFTB1S2 (%) showing "N/A" while SHRTFTB2S2 (%) is showing 99.2. I know Sensor 2 are the sensors behind the cats and my code scanner as well as UpRev will show voltages coming from both post-cat sensors therefore I am wondering if this N/A is a sign of a problem and is related to my heavy misfires on B1, is it just my code reader maybe not properly interfacing or is this normal on our Nissans for this "N/A" to be there? Please see picture.
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2014 370z Touring Sport, Stillen supercharger, cat-back and oil cooler |
04-27-2021, 11:11 AM | #2 (permalink) |
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Location: Frisco, TX
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Drives: 14 370Z Nismo GM 6MT
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Did you change your spark Plugs recently?
Did you change your spark Plugs recently? I did and got counterfeit ones from Amazon. The electrodes melted and the car mis-fired terribly. I went back and bought the genuine ones and the trouble vanished.
Just a thought, if nothing else leaps out at you.
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Corsairprime 2014 Nismo #462, GunMetal Grey, GT-R Start Button, AAM S-Line/R-Line intake and S-Line exhaust, Berk HFCs, Osiris Tuned at JoTech |
04-27-2021, 05:09 PM | #3 (permalink) |
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Join Date: Dec 2019
Location: California
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Drives: 2014 SC 370z
Rep Power: 5 |
It has had the GTR plugs in it for a while, bought them Summit. Last time I had them out to close the gap ever so slightly the plugs look like they are burning well.
I also noticed that Fuel Monitor is not getting ready. Being this is a continuous monitor I would think it should ready right away just like the misfire monitor. Thinking may have something electrical going on.
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2014 370z Touring Sport, Stillen supercharger, cat-back and oil cooler |
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