A little nippy this morning...

MZ DAIZY · 11-14-2019, 05:04 PM

Car always garaged, went down to 20 degrees last night but temp in garage was 65 degrees.

Opened garage door and Pushed start button, started normally.
Left something in house, turned car off went inside.
Roughly 20 minutes later, started car again.

Slowly reved it’s way up (with no help of mine) until it hit rev limiter, then worked it’s way down to idle.

Car is running rock solid as usual, but I had a TPS go bad on me and this is exactly how it started.

Not too concerned right now, but anybody have this happen? I have a Gen III intake and a FI CBE with a revtech tune done by Z1.

nandosman · 11-14-2019, 07:19 PM

I would have freaked out

JARblue · 11-14-2019, 08:33 PM

Huh? A tire pressure sensor causing engine idle issues? That doesn't make sense to me

Hopefully someone else can chime in for you. I've had my idle rev up like that before. Not to redline though. Mine was just dirty MAF/TBs.

redondoaveb · 11-14-2019, 08:47 PM

TPS- throttle position sensor?

BettyZ · 11-14-2019, 10:01 PM

That's the Z calling you a cocktease for that quick on/off.

Sent from my SM-G955U using Tapatalk

vtec to vvel · 11-14-2019, 10:42 PM

Quote:

Originally Posted by MZ DAIZY

Car always garaged, went down to 20 degrees last night but temp in garage was 65 degrees.

Opened garage door and Pushed start button, started normally.
Left something in house, turned car off went inside.
Roughly 20 minutes later, started car again.

Slowly reved it’s way up (with no help of mine) until it hit rev limiter, then worked it’s way down to idle.

Car is running rock solid as usual, but I had a TPS go bad on me and this is exactly how it started.

Not too concerned right now, but anybody have this happen? I have a Gen III intake and a FI CBE with a revtech tune done by Z1.

When you said it revved up slowly, are you referring to the initial system self-check where the all the needles on the gauge clusters go to the other side? Or are you talking about when driving but feels like limp mode?

If the latter, I get this from time to time is bc my MAF sensors are dirty (OBD II sensor pulled MAF code), and turn off for 30 seconds and restart and runs like a beast again.

MZ DAIZY · 11-15-2019, 07:37 AM

Quote:

Originally Posted by nandosman

I would have freaked out

I wasn’t happy!

MZ DAIZY · 11-15-2019, 07:40 AM

Quote:

Originally Posted by JARblue

Huh? A tire pressure sensor causing engine idle issues? That doesn't make sense to me

Hopefully someone else can chime in for you. I've had my idle rev up like that before. Not to redline though. Mine was just dirty MAF/TBs.

TPS = Throttle Positioning Sensor.

Good point on the MAF. Thanks.

MZ DAIZY · 11-15-2019, 07:41 AM

Quote:

Originally Posted by redondoaveb

TPS- throttle position sensor?

Yes sir!

MZ DAIZY · 11-15-2019, 07:48 AM

Quote:

Originally Posted by vtec to vvel

When you said it revved up slowly, are you referring to the initial system self-check where the all the needles on the gauge clusters go to the other side? Or are you talking about when driving but feels like limp mode?

If the latter, I get this from time to time is bc my MAF sensors are dirty (OBD II sensor pulled MAF code), and turn off for 30 seconds and restart and runs like a beast again.

This was after the “sweep” Car was running and just kept revving. Car was screaming! I was getting ready to push the off button when it hit redline and quickly dropped to idle.

Would a dirty MAF throw a CEL? No light and starting/running normally. Just don’t want to go through that again!

MZ DAIZY · 11-15-2019, 07:50 AM

Quote:

Originally Posted by BettyZ

That's the Z calling you a cocktease for that quick on/off.

Sent from my SM-G955U using Tapatalk

Are you calling MZ DAIZY a slut?

SouthArk370Z · 11-15-2019, 09:23 AM

Quote:

Originally Posted by MZ DAIZY

... Would a dirty MAF throw a CEL? No light and starting/running normally. Just don’t want to go through that again!

Not always. The first thing I'd do is check for any DTCs that may have been thrown.

Cleaning the MAFs is very easy - two screws and the MAF slides right out, spray it down with cleaner, let dry, re-install, do the other side. Takes less than 5 minutes per side. Considering all the problems MAFs can cause and how easy they are to clean, you might want to clean them once a year - or every oil change if you're real finicky (but that's probably overkill).

BettyZ · 11-15-2019, 01:45 PM

Quote:

Originally Posted by MZ DAIZY

Are you calling MZ DAIZY a slut?

Better than Cupcakez "die-a-virgin" Z..

Sent from my SM-G955U using Tapatalk

370zBoyz · 11-15-2019, 02:36 PM

so your car rev'd up to red line all by itself?!

CALL A PRIEST

MZ DAIZY · 11-15-2019, 02:48 PM

Quote:

Originally Posted by BettyZ

Better than Cupcakez "die-a-virgin" Z..

Sent from my SM-G955U using Tapatalk

}

11-14-2019, 05:04 PM	#1 (permalink)
MZ DAIZY A True Z Fanatic Join Date: Feb 2018 Location: Atlanta Posts: 1,843 Drives: Miss Daisy Rep Power: 613733	A little nippy this morning... Car always garaged, went down to 20 degrees last night but temp in garage was 65 degrees. Opened garage door and Pushed start button, started normally. Left something in house, turned car off went inside. Roughly 20 minutes later, started car again. Slowly reved it’s way up (with no help of mine) until it hit rev limiter, then worked it’s way down to idle. Car is running rock solid as usual, but I had a TPS go bad on me and this is exactly how it started. Not too concerned right now, but anybody have this happen? I have a Gen III intake and a FI CBE with a revtech tune done by Z1.

11-14-2019, 07:19 PM	#2 (permalink)
nandosman Enthusiast Member Join Date: Mar 2017 Location: IL, US Posts: 344 Drives: 2014 370Z T/S Rep Power: 8	I would have freaked out Optimiser, AestheticCM1 and MZ DAIZY like this. __________________ FI Non-Res Test Pipes \| FI 18" Res CBE \| Stillen Gen 3 CAI \| Dynotuned @ Dynosty EcuTek 325 whp

11-14-2019, 08:33 PM	#3 (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	Huh? A tire pressure sensor causing engine idle issues? That doesn't make sense to me Hopefully someone else can chime in for you. I've had my idle rev up like that before. Not to redline though. Mine was just dirty MAF/TBs. MZ DAIZY likes this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

11-14-2019, 08:47 PM	#4 (permalink)
redondoaveb A True Z Fanatic Join Date: Apr 2017 Location: So. Commiefornia Posts: 6,360 Drives: 2014 Nismo Gunmetal Rep Power: 2684374	TPS- throttle position sensor? JARblue, MZ DAIZY and BettyZ like this. __________________ Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo 700+whp

11-14-2019, 10:01 PM	#5 (permalink)
BettyZ A True Z Fanatic Join Date: Aug 2018 Location: Chicagoland Age: 37 Posts: 5,261 Drives: A Garage Queen Rep Power: 2684371	That's the Z calling you a cocktease for that quick on/off. Sent from my SM-G955U using Tapatalk Rusty, CMadison and MZ DAIZY like this. __________________ '14 MB Nismo \| Boost Lab 6870 1.32 AR 553 HP / 471 ft.-lbs. Betty Mods

11-15-2019, 02:36 PM	#14 (permalink)
370zBoyz Base Member Join Date: Oct 2013 Location: Driver seat Posts: 207 Drives: Nismo Rep Power: 7214	so your car rev'd up to red line all by itself?! CALL A PRIEST Rusty, MZ DAIZY and BettyZ like this.

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