engine rpm drop at idle?

Cell · 06-04-2013, 05:09 PM

While sitting in neutral and when I rev the engine, as the rpm drops it drops below idle and goes back up to normal idle rpm. When it hits it lowest rpm it sounds like the valves are banging on the cylinders. I know others had this problem before but what can I do to fix this? It doesn't happen all the time. I also made a video that I will upload when I get home.

DEpointfive0 · 06-04-2013, 05:11 PM

Sub'd

megalapagas · 06-04-2013, 06:58 PM

Have this problem too, Cell by any chance when that hapoens does your Batterry Gauge seem to drop aswell???

Baer383 · 06-04-2013, 07:04 PM

Is this a stock tune or Uprev?

DIGItonium · 06-04-2013, 09:22 PM

I get this, too, and I can hear the fuel pump motor sag.

Cell · 06-05-2013, 02:55 AM

updated post with video.

Quote:

Originally Posted by megalapagas

Have this problem too, Cell by any chance when that hapoens does your Batterry Gauge seem to drop aswell???

Don't know.

Quote:

Originally Posted by Baer383

Is this a stock tune or Uprev?

stock. does uprev fix it?

logenl7 · 06-05-2013, 06:37 AM

sub'd

jpritche · 06-05-2013, 06:56 AM

My does something similar but when I'm driving and come to a stop, the rpms drop and I can feel the car almost like shudder.

Cell · 06-05-2013, 03:44 PM

Anyone with uprev and tuned have this problem?

megalapagas · 06-06-2013, 12:17 PM

Quote:

Originally Posted by jpritche

My does something similar but when I'm driving and come to a stop, the rpms drop and I can feel the car almost like shudder.

This is what i meant , didnt know how else to put it lol

Z-Girl 12 · 06-16-2013, 02:01 PM

Quote:

Originally Posted by jpritche

My does something similar but when I'm driving and come to a stop, the rpms drop and I can feel the car almost like shudder.

Mine has done it twice, took it to the dealer and they found nothing. my 07 g35 did the same thing alot, dealer finally diagnosed and after 2500.00 fix under warrany thank goodness. traded it in after that, gotta find my invoice to tell you exactly what it was. nissan wants me to bring it to them tomorrow...they think I'm making it up

shakes head:

Cell · 06-16-2013, 02:07 PM

I hope it is a simple thing like a dirty throttle body or just a bad stock tune.

I would assume either one of those would fix it.

The thing is, I only have 24XX miles on my car. I doubt the throttle body is dirty.

fuct · 10-08-2013, 01:28 PM

Quote:

Originally Posted by jpritche

My does something similar but when I'm driving and come to a stop, the rpms drop and I can feel the car almost like shudder.

i made a thread about this. it only happens to me when my AC is on. others on the forum believe its the AC recirculating or something along those lines.

DIGItonium · 06-05-2013, 05:26 PM

I've got the UpRev tune, but I don't remember revving it seeing it drop like that since it's something I hardly do. However, if I let my car idle for several minutes or warm up there are times idle drops momentarily.

Baer383 · 06-05-2013, 08:12 PM

Mine has Uprev and my idle is steady + or - 15 rpm

06-04-2013, 05:09 PM	#1 (permalink)
Cell A True Z Fanatic Join Date: Jan 2010 Location: Chicago Posts: 1,449 Drives: A Garbage Truck Rep Power: 22	engine rpm drop at idle? While sitting in neutral and when I rev the engine, as the rpm drops it drops below idle and goes back up to normal idle rpm. When it hits it lowest rpm it sounds like the valves are banging on the cylinders. I know others had this problem before but what can I do to fix this? It doesn't happen all the time. I also made a video that I will upload when I get home. Last edited by Cell; 06-05-2013 at 02:54 AM.

06-04-2013, 05:11 PM	#2 (permalink)
DEpointfive0 A True Z Fanatic Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17152	Sub'd __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

06-04-2013, 07:04 PM	#4 (permalink)
Baer383 A True Z Fanatic Join Date: Aug 2010 Location: Lawrenceville,Ga Posts: 4,293 Drives: My foot up your azz Rep Power: 30	Is this a stock tune or Uprev? __________________ 2013 ZL1 754 rwhp 747 rwtq

06-04-2013, 09:22 PM	#5 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 43	I get this, too, and I can hear the fuel pump motor sag. __________________

06-05-2013, 06:56 AM	#8 (permalink)
jpritche A True Z Fanatic Join Date: Oct 2010 Location: Cartersville, Ga Age: 33 Posts: 2,570 Drives: '15 RR, '14 IS250 Rep Power: 31	My does something similar but when I'm driving and come to a stop, the rpms drop and I can feel the car almost like shudder. fuct, Initial Z and megalapagas like this.

06-04-2013, 06:58 PM	#3 (permalink)
megalapagas Enthusiast Member Join Date: May 2013 Location: McAllen,TX Posts: 457 Drives: '10 370Z Tour A/T Rep Power: 12	Have this problem too, Cell by any chance when that hapoens does your Batterry Gauge seem to drop aswell???

06-05-2013, 06:37 AM	#7 (permalink)
logenl7 Enthusiast Member Join Date: Sep 2012 Location: Marysville Ohio Age: 38 Posts: 357 Drives: 09 Nissan 370Z 6M Rep Power: 13	sub'd

06-05-2013, 03:44 PM	#9 (permalink)
Cell A True Z Fanatic Join Date: Jan 2010 Location: Chicago Posts: 1,449 Drives: A Garbage Truck Rep Power: 22	Anyone with uprev and tuned have this problem?

06-16-2013, 02:07 PM	#12 (permalink)
Cell A True Z Fanatic Join Date: Jan 2010 Location: Chicago Posts: 1,449 Drives: A Garbage Truck Rep Power: 22	I hope it is a simple thing like a dirty throttle body or just a bad stock tune. I would assume either one of those would fix it. The thing is, I only have 24XX miles on my car. I doubt the throttle body is dirty.

06-05-2013, 05:26 PM	#14 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 43	I've got the UpRev tune, but I don't remember revving it seeing it drop like that since it's something I hardly do. However, if I let my car idle for several minutes or warm up there are times idle drops momentarily. __________________

06-05-2013, 08:12 PM	#15 (permalink)
Baer383 A True Z Fanatic Join Date: Aug 2010 Location: Lawrenceville,Ga Posts: 4,293 Drives: My foot up your azz Rep Power: 30	Mine has Uprev and my idle is steady + or - 15 rpm __________________ 2013 ZL1 754 rwhp 747 rwtq

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