Loss acceleration.... Help...

camapthaman · 12-09-2012, 01:19 AM

Sup everyone...
I just put on pioneer aftermarket head unit. When I was on freeway, my car suddenly loss acceleration. No matter how hard I rev the engine, the acceleration is not there. My rpm was at 3000 and the acceleration is at maybe 10 or 15 mph. Any idea?

DEpointfive0 · 12-09-2012, 01:58 AM

Overheating? Oil temps?
Gotta give us a bit more info brother.
(feel free to text me any time, I'm kinda local)
(310)eight nine three-4207

SouthArk370Z · 12-09-2012, 08:07 AM

Quote:

Originally Posted by camapthaman

... No matter how hard I rev the engine, the acceleration is not there. ...

Sounds like a slipping transmission or clutch problem, but I have a feeling I'm not getting the whole picture.

What do you mean by "suddenly loss acceleration"? Does the car accel at all, flatten out, or actually decel?

Quote:

Originally Posted by camapthaman

My rpm was at 3000 and the acceleration is at maybe 10 or 15 mph.

I'm not sure what this means. You're at 3000 RPM and doing a steady 10-15 MPH? Or accelling slowly?

SPOHN · 12-09-2012, 02:13 PM

Sounds like limp mode. Turn car off and back to see if fixed. If not disconnect battery for 10 minutes to reset everything. Then report back here.

TropicZ · 12-10-2012, 12:28 AM

Quote:

Originally Posted by SPOHN

Sounds like limp mode. Turn car off and back to see if fixed. If not disconnect battery for 10 minutes to reset everything. Then report back here.

What he said.

Tribalpinoy91 · 12-10-2012, 01:01 AM

I noticed you mentioned the installation of a HU in the context of your problem of a loss of acceleration...

phunk · 12-11-2012, 03:51 PM

first post sounds most likely like a clutch. he says no matter how hard he revs it, it will not accelerate. if the RPM is climbing and the car is not accelerating, either the car is not in gear, or the clutch is slipping

fuct · 12-11-2012, 04:37 PM

yea its crazy how those darn pioneer headunits can burn up clutches....... :\

phunk · 12-11-2012, 05:09 PM

Quote:

Originally Posted by fuct

yea its crazy how those darn pioneer headunits can burn up clutches....... :\

lol clearly unrelated

SoCalBoy · 12-11-2012, 05:28 PM

slave cylinder maybe....are you able to get it into gear

Quote:

Originally Posted by fuct

yea its crazy how those darn pioneer headunits can burn up clutches....... :\

Mandingo · 12-11-2012, 06:33 PM

No check engine light? Get the codes read

DOOMMONKEY777 · 12-15-2012, 04:53 AM

Yeah....if you can feel the clutch, when you press the pedal? If not, might be csc i think its your lsd....just a thought

Tribalpinoy91 · 12-15-2012, 11:41 AM

I don't believe this was mentioned yet but the simplest problem may be the easiest solution- you using premium gas?

If your car is a manual then it could anything stated above.

Other than that it could be a vacuum hose, i used to drive an eclipse and my accel and rpms were off due to the vac hose.

/Angelo350Z/ · 01-20-2014, 10:02 PM

I'm bumping an older thread since this happened to me twice already. I bought the car brand new in Feb '13 and this happened within a month or two of ownership while the car was bone stock. I have since installed a CBE and everything was fine for a few months until this weekend when it happened again. Basically there's very minimal throttle response. I was accelerating from a light when the car just didn't want to rev past 3K RPMs. I downshifted from 5th to 3rd but still nothing. I floored 3rd and the RPMs rose from 2.5K to 3K. That was it. I commute about 9 miles to work one way, and I experienced it during one of those short trips. No, the car didn't throw any codes, wasn't overheating, and it was particularly cool outside since it was late in the afternoon. I always get the premium fuel from the same gas station so that can't be it either. My car just hit 4K miles and I never ride the clutch so that's out of the question. The condition is "erased" after I turn it off and start it back up--even without waiting a few minutes for the car to cool. I'm sure the ECU is getting some faulty inputs from sensors that's causing this.

DOOMMONKEY777 · 01-21-2014, 11:54 AM

Yeah limp mode due to overheat, instal oil cooler to fix problem, or the cheap way DO NOT OVERHEAT the engine.

12-09-2012, 01:19 AM	#1 (permalink)
camapthaman Base Member Join Date: Jun 2012 Location: Anaheim Posts: 5 Drives: 2011 Nissan 370Z MT Rep Power: 13	Loss acceleration.... Help... Sup everyone... I just put on pioneer aftermarket head unit. When I was on freeway, my car suddenly loss acceleration. No matter how hard I rev the engine, the acceleration is not there. My rpm was at 3000 and the acceleration is at maybe 10 or 15 mph. Any idea?

12-09-2012, 02:13 PM	#4 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 222	Sounds like limp mode. Turn car off and back to see if fixed. If not disconnect battery for 10 minutes to reset everything. Then report back here. Trips likes this. __________________

12-11-2012, 03:51 PM	#7 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,669 Drives: 370 Rep Power: 974724	first post sounds most likely like a clutch. he says no matter how hard he revs it, it will not accelerate. if the RPM is climbing and the car is not accelerating, either the car is not in gear, or the clutch is slipping __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

12-11-2012, 06:33 PM	#11 (permalink)
Mandingo Track Member Join Date: Nov 2010 Location: Dallas Posts: 625 Drives: '10 370z 6spd Rep Power: 3371	No check engine light? Get the codes read __________________ some mods

12-15-2012, 04:53 AM	#12 (permalink)
DOOMMONKEY777 A True Z Fanatic Join Date: Sep 2010 Location: Crooklyn Posts: 1,011 Drives: 370Z 6psd-sport-pkg Rep Power: 21	Yeah....if you can feel the clutch, when you press the pedal? If not, might be csc i think its your lsd....just a thought __________________ Kids don't do Drugs, Drugs are bad, so let the professional druggies do Drugs for you. 537whp/496lb/tq@8-9PSI 93 octane

12-09-2012, 01:58 AM	#2 (permalink)
DEpointfive0 A True Z Fanatic Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17152	Overheating? Oil temps? Gotta give us a bit more info brother. (feel free to text me any time, I'm kinda local) (310)eight nine three-4207

12-10-2012, 01:01 AM	#6 (permalink)
Tribalpinoy91 Track Member Join Date: May 2012 Location: Las Vegas Posts: 607 Drives: 370z PW Rep Power: 14	I noticed you mentioned the installation of a HU in the context of your problem of a loss of acceleration...

12-11-2012, 04:37 PM	#8 (permalink)
fuct A True Z Fanatic Join Date: May 2009 Location: Sugar Land Posts: 3,692 Drives: 97' Ranger :) Rep Power: 24	yea its crazy how those darn pioneer headunits can burn up clutches....... :\

12-15-2012, 11:41 AM	#13 (permalink)
Tribalpinoy91 Track Member Join Date: May 2012 Location: Las Vegas Posts: 607 Drives: 370z PW Rep Power: 14	I don't believe this was mentioned yet but the simplest problem may be the easiest solution- you using premium gas? If your car is a manual then it could anything stated above. Other than that it could be a vacuum hose, i used to drive an eclipse and my accel and rpms were off due to the vac hose. Last edited by Tribalpinoy91; 12-15-2012 at 11:44 AM.

01-20-2014, 10:02 PM	#14 (permalink)
/Angelo350Z/ A True Z Fanatic Join Date: Feb 2013 Location: Germany Posts: 2,230 Drives: Z34 \| MK7 \| F82 Rep Power: 3661	I'm bumping an older thread since this happened to me twice already. I bought the car brand new in Feb '13 and this happened within a month or two of ownership while the car was bone stock. I have since installed a CBE and everything was fine for a few months until this weekend when it happened again. Basically there's very minimal throttle response. I was accelerating from a light when the car just didn't want to rev past 3K RPMs. I downshifted from 5th to 3rd but still nothing. I floored 3rd and the RPMs rose from 2.5K to 3K. That was it. I commute about 9 miles to work one way, and I experienced it during one of those short trips. No, the car didn't throw any codes, wasn't overheating, and it was particularly cool outside since it was late in the afternoon. I always get the premium fuel from the same gas station so that can't be it either. My car just hit 4K miles and I never ride the clutch so that's out of the question. The condition is "erased" after I turn it off and start it back up--even without waiting a few minutes for the car to cool. I'm sure the ECU is getting some faulty inputs from sensors that's causing this. __________________ 2013 MB NISSAN 370Z SPORT

01-21-2014, 11:54 AM	#15 (permalink)
DOOMMONKEY777 A True Z Fanatic Join Date: Sep 2010 Location: Crooklyn Posts: 1,011 Drives: 370Z 6psd-sport-pkg Rep Power: 21	Yeah limp mode due to overheat, instal oil cooler to fix problem, or the cheap way DO NOT OVERHEAT the engine. __________________ Kids don't do Drugs, Drugs are bad, so let the professional druggies do Drugs for you. 537whp/496lb/tq@8-9PSI 93 octane

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