Originally Posted By: 92saturnsl2
Originally Posted By: michaelluscher
I'd normally agree, but you've never owned a VG or VQ series Nissan, have you?
You'll learn to ignore that P0325
Now why is this? I had a 2001 Frontier with the VG33ER (supercharged), and input from the knock sensor would cause the ECU to dump all boost (turning the engine into a total slug) for seemingly no reason, even when using high quality 93 octane gas. I eventually had to resort to bypassing the knock sensor with resistors, and it drove great for 100K+ miles that way. I would get about 8 mpg and horrible performance (felt like a 2 cylinder, not a six) when the knock sensor would intervene. I thought this was simply due to the supercharged engine's ECU being overly conservative, but after reading this, I'm not so sure.
Are all Nissan knock sensors [censored]? Is there additional performance to be had by getting this code cleared either with a new sensor or some bypass? Why is this code being set, and why is it considered 'normal'?
Failed knock sensors have a minimal if any affect at all on the Naturally aspirated VG, and VQ motors. It does however have a drastic affect on performance in the Supercharged Frontiers.
My dads knock sensor on his 01 S/C Frontier threw a code, and like you said power was drastically reduced. The dealer replaced it under warranty ,and it has been fine since. Over 260k currently on it.
Originally Posted By: michaelluscher
I'd normally agree, but you've never owned a VG or VQ series Nissan, have you?
You'll learn to ignore that P0325
Now why is this? I had a 2001 Frontier with the VG33ER (supercharged), and input from the knock sensor would cause the ECU to dump all boost (turning the engine into a total slug) for seemingly no reason, even when using high quality 93 octane gas. I eventually had to resort to bypassing the knock sensor with resistors, and it drove great for 100K+ miles that way. I would get about 8 mpg and horrible performance (felt like a 2 cylinder, not a six) when the knock sensor would intervene. I thought this was simply due to the supercharged engine's ECU being overly conservative, but after reading this, I'm not so sure.
Are all Nissan knock sensors [censored]? Is there additional performance to be had by getting this code cleared either with a new sensor or some bypass? Why is this code being set, and why is it considered 'normal'?
Failed knock sensors have a minimal if any affect at all on the Naturally aspirated VG, and VQ motors. It does however have a drastic affect on performance in the Supercharged Frontiers.
My dads knock sensor on his 01 S/C Frontier threw a code, and like you said power was drastically reduced. The dealer replaced it under warranty ,and it has been fine since. Over 260k currently on it.