Car feels like its gonna stall. Is this happening to you?

Juruki · 07-11-2011, 07:14 PM

7AT - 370z
So lately i have been noticing while stopped at red lights that my rpms drop to 500rpm and my car shakes a little and feels like its gonna stall. It happens for a split second and then the rpms climb back up to 700rpms. Car drives perfectly normal. Does this happen to any of you? Any idea what it could be?
I know the obvious answer is going to the dealer but my car is too low..

DJ-of-E · 07-11-2011, 07:24 PM

Still, send it to the dealer or a mechanic. My guess (may not apply to 370z, but usually happens to most cars I worked with) is that there's a vacuum leak. See if issue happens when you slow down when you brake and try it without braking but with e-brake.

If it happens when you brake, probably a vacuum leak on your brake booster or its hose.

ZPhycho · 07-11-2011, 08:10 PM

Happens to me everytime I drive and only when stopped not annoying enough to take it to the dealer and deal with their BS

Z_ealot · 07-11-2011, 09:04 PM

just throwing my 2 cents in, but this happens with my cobalt when i have the A/C on and i was told it was perfectly normal which i believe it is since i've never had a problem with the engine otherwise.

Ridgerunner · 07-11-2011, 09:15 PM

When the AC compresser comes on, the engine should speed up to take the compresser load and keep car from stalling, once compresser goes off, idle should drop to normal idle speed. Sonds like yours is dropping too low of RPM after AC shuts off. See if it happens with AC off.

Synack · 07-12-2011, 12:39 PM

Same thing with mine.

Juruki · 07-12-2011, 02:06 PM

Quote:

Originally Posted by Ridgerunner

When the AC compresser comes on, the engine should speed up to take the compresser load and keep car from stalling, once compresser goes off, idle should drop to normal idle speed. Sonds like yours is dropping too low of RPM after AC shuts off. See if it happens with AC off.

hmmmm interesting... Maybe i noticed it latety cuz ive been using the AC a lot. Im gonna see if it happens with the AC off

tyler20c · 07-13-2011, 07:45 PM

Mine did this for a while and I noticed that one of the breather hoses from the intake had come off. I replaced the breather hose and used some high temp tape to fasten them on both sides. Now the car hasn't done it since.

shaun66 · 07-13-2011, 09:34 PM

how many miles? Another thing could be dirty throttle bodies, that can cause a bad idle.

DJ-of-E · 07-14-2011, 10:29 AM

Quote:

Originally Posted by shaun66

how many miles? Another thing could be dirty throttle bodies, that can cause a bad idle.

that must be one REALLY dusty area you live in. Either than or you haven't cleaned out the filters for a while.

elmz · 07-14-2011, 01:00 PM

I'd take it in to the dealer, it should not feel like its about to stall when you have the AC on. But Ridgerunner is right, you can see and hear the revs go up when you turn on/off the AC at a stop light. Sometimes I do this for fun, I'm easily amused =).

AlexRaymond19 · 07-16-2011, 12:28 AM

My z idles at 500 rpm... It has since the day i got it brand new. But then again it doesnt feel/sound like its going to stall out either.

07-11-2011, 07:14 PM	#1 (permalink)
Juruki Track Member Join Date: Mar 2010 Location: SoCal Posts: 965 Drives: 370Z Tour/Sport/Navi Rep Power: 16	Car feels like its gonna stall. Is this happening to you? 7AT - 370z So lately i have been noticing while stopped at red lights that my rpms drop to 500rpm and my car shakes a little and feels like its gonna stall. It happens for a split second and then the rpms climb back up to 700rpms. Car drives perfectly normal. Does this happen to any of you? Any idea what it could be? I know the obvious answer is going to the dealer but my car is too low.. __________________ 09 370z - 7AT Volk Racing TE37SL / BC Coilovers / Berk HFC / TopSpeed CBE + Y-Pipe / Mines Spoiler Last edited by Juruki; 07-11-2011 at 07:22 PM.

07-11-2011, 07:24 PM	#2 (permalink)
DJ-of-E Track Member Join Date: Apr 2011 Location: Garden Grove, CA Posts: 676 Drives: 00 Toyota Celica 040 Rep Power: 15	Still, send it to the dealer or a mechanic. My guess (may not apply to 370z, but usually happens to most cars I worked with) is that there's a vacuum leak. See if issue happens when you slow down when you brake and try it without braking but with e-brake. If it happens when you brake, probably a vacuum leak on your brake booster or its hose. __________________

07-11-2011, 08:10 PM	#3 (permalink)
ZPhycho Base Member Join Date: Aug 2010 Location: Orlando FL Posts: 173 Drives: 2009 370z PW AT Rep Power: 15	Happens to me everytime I drive and only when stopped not annoying enough to take it to the dealer and deal with their BS __________________ 2009 370Z- COBB post MAF tubes, K&N drop in filters, CNT cat-back, JDM rear fog light, P-4200 HU

07-12-2011, 12:39 PM	#6 (permalink)
Synack A True Z Fanatic Join Date: Apr 2011 Location: Houston Age: 36 Posts: 1,012 Drives: Sideways Rep Power: 16	Same thing with mine. __________________ NO LONGER OWNS A 370 Turbo FR-S

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07-11-2011, 09:04 PM	#4 (permalink)
Z_ealot A True Z Fanatic Join Date: Sep 2010 Location: Albuquerque, NM Posts: 2,045 Drives: 09 370Z Touring/Sprt Rep Power: 10091	just throwing my 2 cents in, but this happens with my cobalt when i have the A/C on and i was told it was perfectly normal which i believe it is since i've never had a problem with the engine otherwise.

07-11-2011, 09:15 PM	#5 (permalink)
Ridgerunner Base Member Join Date: Jul 2010 Location: Arkansas Posts: 79 Drives: 09 370Z Black 6M SP Rep Power: 15	When the AC compresser comes on, the engine should speed up to take the compresser load and keep car from stalling, once compresser goes off, idle should drop to normal idle speed. Sonds like yours is dropping too low of RPM after AC shuts off. See if it happens with AC off.

07-13-2011, 07:45 PM	#8 (permalink)
tyler20c Base Member Join Date: Dec 2010 Location: Tampa Posts: 174 Drives: G37 Rep Power: 14	Mine did this for a while and I noticed that one of the breather hoses from the intake had come off. I replaced the breather hose and used some high temp tape to fasten them on both sides. Now the car hasn't done it since.

07-13-2011, 09:34 PM	#9 (permalink)
shaun66 Track Member Join Date: Mar 2010 Location: n Posts: 837 Drives: MB 370z 7AT Rep Power: 16	how many miles? Another thing could be dirty throttle bodies, that can cause a bad idle.

07-14-2011, 01:00 PM	#11 (permalink)
elmz Track Member Join Date: Feb 2009 Location: San Diego, CA Posts: 674 Drives: 2014 Porsche Boxster Rep Power: 17	I'd take it in to the dealer, it should not feel like its about to stall when you have the AC on. But Ridgerunner is right, you can see and hear the revs go up when you turn on/off the AC at a stop light. Sometimes I do this for fun, I'm easily amused =).

07-16-2011, 12:28 AM	#12 (permalink)
AlexRaymond19 Track Member Join Date: Jun 2011 Location: Maine Posts: 771 Drives: 2010 Nissan 370z Rep Power: 15	My z idles at 500 rpm... It has since the day i got it brand new. But then again it doesnt feel/sound like its going to stall out either.