HELP: Sudden RPM Drop (video)

SgtGoldy · 02-03-2013, 05:02 PM

I asked the G community but they werent too helpful...

It just started yesterday:

While accelerating my G acts completely normal, when i let off the gas it quickly drops to 500 (vehicle shudders) then the RPMs rise back above 1k. It wouldn't bother me but every so often it drops just too low and the vehicle feels like she wants to shut off

.

In the video it isnt dropping as quickly as it was yesterday, but still fast (dont mind the tire light. I had a nail and havent gotten around to doing the warning reset diy)

DEpointfive0 · 02-03-2013, 05:09 PM

So, you're saying the bounce the needle does isn't you?

Are you M/T?

DEpointfive0 · 02-03-2013, 05:09 PM

If you're A/T, go to your tuner

Mitco39 · 02-03-2013, 05:25 PM

I would guess your are either going to lean or too rich on 0 TP, then it takes a second or so for the engine to dial back in the afrs. If it started happening out of the blue I would possibly look towards a vacuum leak.

SgtGoldy · 02-03-2013, 06:26 PM

Thanks guys! yea its an AT, I will look for a vacuum leak when I get off work

Mitco39 · 02-03-2013, 07:32 PM

If you have a propane torch turn it on but dont light it, hover it around the engine. If there is a vacuum leak it will suck in the propane and the idle will increase. It will help you pin point where it is.

Goodluck!

Aznsensazn · 02-03-2013, 07:34 PM

I had the same issue before, its more than likely a vacuum leak. Good luck finding it!

SgtGoldy · 02-03-2013, 07:59 PM

Thanks Aznsensanzn (not gonna lie, had to double check my spelling on your username twice lol)

02-03-2013, 05:02 PM	#1 (permalink)
SgtGoldy A True Z Fanatic Join Date: Feb 2009 Location: Orange County, CA Posts: 3,503 Drives: C63 AMG - LSD Rep Power: 651	HELP: Sudden RPM Drop (video) I asked the G community but they werent too helpful... It just started yesterday: While accelerating my G acts completely normal, when i let off the gas it quickly drops to 500 (vehicle shudders) then the RPMs rise back above 1k. It wouldn't bother me but every so often it drops just too low and the vehicle feels like she wants to shut off . In the video it isnt dropping as quickly as it was yesterday, but still fast (dont mind the tire light. I had a nail and havent gotten around to doing the warning reset diy) __________________ C63 AMG LSD - Straight Pipe - EuroCharge v5 - Vossen CV7 - IG: @SuperFastYo

02-03-2013, 05:25 PM	#4 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	I would guess your are either going to lean or too rich on 0 TP, then it takes a second or so for the engine to dial back in the afrs. If it started happening out of the blue I would possibly look towards a vacuum leak. DEpointfive0 likes this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

02-03-2013, 06:26 PM	#5 (permalink)
SgtGoldy A True Z Fanatic Join Date: Feb 2009 Location: Orange County, CA Posts: 3,503 Drives: C63 AMG - LSD Rep Power: 651	Thanks guys! yea its an AT, I will look for a vacuum leak when I get off work __________________ C63 AMG LSD - Straight Pipe - EuroCharge v5 - Vossen CV7 - IG: @SuperFastYo

02-03-2013, 07:32 PM	#6 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	If you have a propane torch turn it on but dont light it, hover it around the engine. If there is a vacuum leak it will suck in the propane and the idle will increase. It will help you pin point where it is. Goodluck! __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

02-03-2013, 07:59 PM	#8 (permalink)
SgtGoldy A True Z Fanatic Join Date: Feb 2009 Location: Orange County, CA Posts: 3,503 Drives: C63 AMG - LSD Rep Power: 651	Thanks Aznsensanzn (not gonna lie, had to double check my spelling on your username twice lol) __________________ C63 AMG LSD - Straight Pipe - EuroCharge v5 - Vossen CV7 - IG: @SuperFastYo

02-03-2013, 05:09 PM	#2 (permalink)
DEpointfive0 A True Z Fanatic Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17152	So, you're saying the bounce the needle does isn't you? Are you M/T?

02-03-2013, 05:09 PM	#3 (permalink)
DEpointfive0 A True Z Fanatic Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17152	If you're A/T, go to your tuner

02-03-2013, 07:34 PM	#7 (permalink)
Aznsensazn Base Member Join Date: Dec 2012 Location: Texas Posts: 96 Drives: 12' PW Touring AT Rep Power: 13	I had the same issue before, its more than likely a vacuum leak. Good luck finding it!

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