SR20det Red/Blacktop Knock Sensor Question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

***dorkidori_s13*** · 12-21-2013, 07:25 PM

My SR has been getting worse and worse lately as far as this little gremlin Ive had running around causing problems. Its narrowed down to either 1 of two things that I can think of...

1) BAD KNOCK SENSOR

2) BAD MAFS

The bad knock sensor is a definite as I hooked up the car up to Nistune when I put a new TPS in last week so I could properly set the IACV, TPS and Throttle Set Screw (to enable closed throttle flag). When Nistune checked my ECU, it found code 34 which is Knock Sensor Fail. I have a new knock sensor on the way and it will be here Monday.

In the mean time, I believe Code 34 can also relate to MAFS issues as well (my MAFS has never given me issues, its cleaned every month and I run a K&N Air Filter). The symptoms of the motor right now are CRAP gas millage and REALLY bad hesitation in accelerating at mid to full throttle between 1500-3400 RPMs (car pulls fine when in boost). There are no boost leaks, everything works fine in the engine.

So can anyone confirm to me what I already think I know. The car is in limp mode at the moment due to a faulty knock sensor (which Ive read causes all the symptoms I currently have). Has anyone ever had their knock sensor go out on them and pull code 34 from the ECU?

12-21-2013, 07:25 PM	#1
*dorkidori_s13* ITS LISA'S FAULT!!! Join Date: Jun 2003 Location: Las Vegas Age: 43 Posts: 7,496 Trader Rating: (41) Feedback Score: 41 reviews	SR20det Red/Blacktop Knock Sensor Question My SR has been getting worse and worse lately as far as this little gremlin Ive had running around causing problems. Its narrowed down to either 1 of two things that I can think of... 1) BAD KNOCK SENSOR 2) BAD MAFS The bad knock sensor is a definite as I hooked up the car up to Nistune when I put a new TPS in last week so I could properly set the IACV, TPS and Throttle Set Screw (to enable closed throttle flag). When Nistune checked my ECU, it found code 34 which is Knock Sensor Fail. I have a new knock sensor on the way and it will be here Monday. In the mean time, I believe Code 34 can also relate to MAFS issues as well (my MAFS has never given me issues, its cleaned every month and I run a K&N Air Filter). The symptoms of the motor right now are CRAP gas millage and REALLY bad hesitation in accelerating at mid to full throttle between 1500-3400 RPMs (car pulls fine when in boost). There are no boost leaks, everything works fine in the engine. So can anyone confirm to me what I already think I know. The car is in limp mode at the moment due to a faulty knock sensor (which Ive read causes all the symptoms I currently have). Has anyone ever had their knock sensor go out on them and pull code 34 from the ECU? __________________ Check out my IG for what I'm up to! DORKIDORI INSTAGRAM!!!