SynchroRev Issue Redlining When Not In Gear

40thfismo · 03-14-2018, 10:28 AM

I have a 2010 40th Anniversary. I have had full bolt on mods for a few years now and have never experienced an issue. I've decided to upgrade the exhaust to something different in the future and for fun I got QTP cutouts installed a few weeks ago alongside all new suspension (coilovers, control/camber/toe arms, etc.).

Ever since then, and I doubt it's related, I have been experiencing the car redline to 7,500 and hold it there for 3-5 seconds. This doesn't happen all the time, but when it does it's when I'm slowing down to a stop. I'll literally not be moving, in neutral, and the car is just sitting there at 7,500 rpms and I have to wait for it to die down because I'm not going to turn the car off or shift it in to a gear while it's like that. I can't find anything online about it, my techs at the Nissan store I work at have never heard of this, and I'm trying to see if anyone has any incite for me. Please help, thank you.

JARblue · 03-14-2018, 10:42 AM

The car redlines by itself in neutral? That seems crazy. And certainly isn't good for it

My idle revs increase sometimes. But I'm talking like from normal idle (~1K RPMs) to maybe 2500 or 3000 RPMs at most. It's usually due to dirty MAF sensors or throttle bodies. I clean them and the idle revs settle right back down to normal.

It sounds like you have a different issue though. Hope someone else can chime in and help.

Hotrodz · 03-14-2018, 01:24 PM

Are you rocking the shifter while it's in neutral? This can cause the motor to rev up because it thinks you are going to shift gears. It shouldn't last that long though!

Sent from my SM-N910P using Tapatalk

40thfismo · 03-14-2018, 04:01 PM

No, I am sitting still. 0mph and not touching the shifter. I'm going to try resetting my ECU and see if that helps, still looking to see if anyone else has experienced this though

SouthArk370Z · 03-14-2018, 04:20 PM

Quote:

Originally Posted by 40thfismo

... I got QTP cutouts installed a few weeks ago alongside all new suspension (coilovers, control/camber/toe arms, etc.). ...

I'd start by checking for sensors that could have been broken or unwired when installing the suspension/exhaust parts. My guess is that it's an engine speed or transmission speed sensor.

Eagle · 03-15-2018, 04:54 PM

Does this happen while you're foot has completely depressed the clutch pedal and you are coasting to a stop? Is it also happening as you are going from in gear to neutral?

40thfismo · 03-21-2018, 11:27 AM

Quote:

Originally Posted by Eagle

Does this happen while you're foot has completely depressed the clutch pedal and you are coasting to a stop? Is it also happening as you are going from in gear to neutral?

yes, but at 3mph or less and even at a complete stop. 1st gear would never be running that high of an rpm in these situations if that's what you're thinking and it even holds it for a lengthy period of time, not just a quick rev like s-mode normally does

nis350 · 03-21-2018, 11:26 PM

probably issues with the sensors for the SRM as other post stated...

does it still happen with it off?

Quote:

Originally Posted by 40thfismo

yes, but at 3mph or less and even at a complete stop. 1st gear would never be running that high of an rpm in these situations if that's what you're thinking and it even holds it for a lengthy period of time, not just a quick rev like s-mode normally does

03-14-2018, 10:28 AM	#1 (permalink)
40thfismo Base Member Join Date: Jan 2018 Location: Fayetteville, Arkansas Posts: 3 Drives: 2010 370z KAV M6 Rep Power: 7	SynchroRev Issue Redlining When Not In Gear I have a 2010 40th Anniversary. I have had full bolt on mods for a few years now and have never experienced an issue. I've decided to upgrade the exhaust to something different in the future and for fun I got QTP cutouts installed a few weeks ago alongside all new suspension (coilovers, control/camber/toe arms, etc.). Ever since then, and I doubt it's related, I have been experiencing the car redline to 7,500 and hold it there for 3-5 seconds. This doesn't happen all the time, but when it does it's when I'm slowing down to a stop. I'll literally not be moving, in neutral, and the car is just sitting there at 7,500 rpms and I have to wait for it to die down because I'm not going to turn the car off or shift it in to a gear while it's like that. I can't find anything online about it, my techs at the Nissan store I work at have never heard of this, and I'm trying to see if anyone has any incite for me. Please help, thank you. Last edited by 40thfismo; 03-14-2018 at 10:42 AM.

03-14-2018, 10:42 AM	#2 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	The car redlines by itself in neutral? That seems crazy. And certainly isn't good for it My idle revs increase sometimes. But I'm talking like from normal idle (~1K RPMs) to maybe 2500 or 3000 RPMs at most. It's usually due to dirty MAF sensors or throttle bodies. I clean them and the idle revs settle right back down to normal. It sounds like you have a different issue though. Hope someone else can chime in and help. Hotrodz likes this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

03-14-2018, 01:24 PM	#3 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	Are you rocking the shifter while it's in neutral? This can cause the motor to rev up because it thinks you are going to shift gears. It shouldn't last that long though! Sent from my SM-N910P using Tapatalk Eagle and scope22 like this. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

03-15-2018, 04:54 PM	#6 (permalink)
Eagle Track Member Join Date: Jan 2011 Location: South Orange County, CA Posts: 885 Drives: 2011 370z Red 6MT Rep Power: 10656	Does this happen while you're foot has completely depressed the clutch pedal and you are coasting to a stop? Is it also happening as you are going from in gear to neutral? __________________ nismo\| EVO-R High Wing \| *Stillen* Gen 3 CAI \| SEIBON TS Hood \| Z1 34 Row Oil Cooler \| VMR 810 Wheels \| Endless MX72 Pads \|*Sabelt* GT-140 Seat \|Fly1Motorsports RS1 Fenders \| Hotchkis Front Sway Bar \| Berk HFC \|

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03-14-2018, 04:01 PM	#4 (permalink)
40thfismo Base Member Join Date: Jan 2018 Location: Fayetteville, Arkansas Posts: 3 Drives: 2010 370z KAV M6 Rep Power: 7	No, I am sitting still. 0mph and not touching the shifter. I'm going to try resetting my ECU and see if that helps, still looking to see if anyone else has experienced this though