Nissan 370Z Forum - View Single Post - Odd Issue: S-Mode and A/C

juld0zer · 10-08-2013, 11:01 AM

i thought you cured the sluggish response with a new brake pedal switch? or was that something different. from memory you experienced a limp mode-like reaction at the lights.

it's a real shame that it seems Nissans have quite a few common problems yet no real effort seems to have been invested to fix them for good in future models. eg.
- dead throttle response on take off due to defective brake pedal sensor(s)
- clicking noise from axle spline/hub area due to lack of (suitable/adequate) grease applied during factory assembly
- Air mix door motors/doors in the HVAC system failing due to lack of lubrication and/or materials not durable enough. Resulting in self destruction of said door.

Just to confirm, your foot is right to the very end of the clutch pedal travel each time yeah? So far it sounds to me it's the gear lever sensor but try backing out the lower clutch pedal sensor a bit. Backing it out will result in the system blipping a tad earlier. Measure how much of the thread is protruding prior to adjustment so you can revert back if result is no discernible difference.

It's early days for me but i think i fixed mine. My sloppy SRM action (not enough blip resulting in rough unpredictable shifting) was due to fine metal particles stuck to the tip of the input speed sensor. The sensor is on the left side of the gearbox almost perpendicular to the rear cat flange. I found no visible damage to the loom due to heat or physical damage.
Think of the crap that gets stuck to a magetic engine oil sump plug. That's the amount and fine-ness of this silvery coloured substance i found on the tip.
From my experience with these type of sensors, any metal on the tip can interfere with signal production.
The same type of sensor is responsible for sloppy shifts in automatic transmissions of orher cars.
There seriously wasnt much of this material on the sensor but cleaning it was enough to restore smooth up and down shifting at various rpm. No more holding breath as i re engage clutch!
I will report back in 1000km to see if it holds up. but i will look into fitting a magnetic gearbox drain plug to keep those metal particles at bay.

10-08-2013, 11:01 AM	#8 (permalink)
juld0zer Enthusiast Member Join Date: Nov 2012 Location: Sydney Posts: 428 Drives: 11 Nissan 370Z MB M6 Rep Power: 139	i thought you cured the sluggish response with a new brake pedal switch? or was that something different. from memory you experienced a limp mode-like reaction at the lights. it's a real shame that it seems Nissans have quite a few common problems yet no real effort seems to have been invested to fix them for good in future models. eg. - dead throttle response on take off due to defective brake pedal sensor(s) - clicking noise from axle spline/hub area due to lack of (suitable/adequate) grease applied during factory assembly - Air mix door motors/doors in the HVAC system failing due to lack of lubrication and/or materials not durable enough. Resulting in self destruction of said door. Just to confirm, your foot is right to the very end of the clutch pedal travel each time yeah? So far it sounds to me it's the gear lever sensor but try backing out the lower clutch pedal sensor a bit. Backing it out will result in the system blipping a tad earlier. Measure how much of the thread is protruding prior to adjustment so you can revert back if result is no discernible difference. It's early days for me but i think i fixed mine. My sloppy SRM action (not enough blip resulting in rough unpredictable shifting) was due to fine metal particles stuck to the tip of the input speed sensor. The sensor is on the left side of the gearbox almost perpendicular to the rear cat flange. I found no visible damage to the loom due to heat or physical damage. Think of the crap that gets stuck to a magetic engine oil sump plug. That's the amount and fine-ness of this silvery coloured substance i found on the tip. From my experience with these type of sensors, any metal on the tip can interfere with signal production. The same type of sensor is responsible for sloppy shifts in automatic transmissions of orher cars. There seriously wasnt much of this material on the sensor but cleaning it was enough to restore smooth up and down shifting at various rpm. No more holding breath as i re engage clutch! I will report back in 1000km to see if it holds up. but i will look into fitting a magnetic gearbox drain plug to keep those metal particles at bay.