G35 Sedan V36 2007- 08 Discussion about the 2nd Generation G35 Sedan 2007 - 08

RPM's reading too high

Thread Tools
 
Search this Thread
 
Rate Thread
 
  #1  
Old 08-16-2007, 04:27 PM
ugaexploder's Avatar
Registered User
Thread Starter
iTrader: (1)
Join Date: Jul 2007
Location: ATL
Posts: 2,288
Received 1 Like on 1 Post
RPM's reading too high

Does anyone have this problem? Whenever I start my car sometimes it reads at 2600rpm rather than 600rpm at idle, but the engine is not actually idling at 2600. It just reads 2000rpm's higher than it should.
 
  #2  
Old 08-16-2007, 04:40 PM
SPEEED's Avatar
Bad Toro
Join Date: Jul 2003
Location: Stamford, CT
Posts: 12,576
Likes: 0
Received 0 Likes on 0 Posts
It doesn't false read. Every modern engine with automatic choke, when started will run on higher RPM for a couple of minutes (or longer depends on the outside temp), until the engine is brought to a working temp. As the engine gradually reaches optimal working temp, the ECU will gradually bring the RPMs down.
 
  #3  
Old 08-16-2007, 05:27 PM
G-Whizzer's Avatar
Registered User
Join Date: Jan 2007
Location: Pasadena California USA
Posts: 1,328
Likes: 0
Received 0 Likes on 0 Posts
"It just reads 2000rpm's higher than it should."

So how do you know it's reading higher?
 
  #4  
Old 08-16-2007, 05:29 PM
logik05se's Avatar
Registered User
Join Date: Jul 2006
Posts: 1,133
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by G-Whizzer
"It just reads 2000rpm's higher than it should."

So how do you know it's reading higher?
thats what i was wondering lol
 
  #5  
Old 08-16-2007, 06:59 PM
CalsonicVQ's Avatar
Registered User
iTrader: (1)
Join Date: Feb 2007
Location: Bay Area, CA
Posts: 665
Likes: 0
Received 0 Likes on 0 Posts
even so, i don't think my car has ever hit 2600 rpms during a cold start in the morning. IIRC, it usually idles at ~2000rpms for a bit during morning cold starts.
 
  #6  
Old 08-16-2007, 07:21 PM
SPEEED's Avatar
Bad Toro
Join Date: Jul 2003
Location: Stamford, CT
Posts: 12,576
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by CalsonicVQ
even so, i don't think my car has ever hit 2600 rpms during a cold start in the morning. IIRC, it usually idles at ~2000rpms for a bit during morning cold starts.
Actually 2600 sounds about right.
 
  #7  
Old 08-16-2007, 07:25 PM
nghiars's Avatar
Registered User
iTrader: (7)
Join Date: Apr 2006
Location: SoCal 714
Posts: 5,342
Received 10 Likes on 10 Posts
Originally Posted by SPEEED
Actually 2600 sounds about right.
for the 1st 1 or 2 seconds and usually drops below 2k rather quickly
 
  #8  
Old 08-16-2007, 08:40 PM
ugaexploder's Avatar
Registered User
Thread Starter
iTrader: (1)
Join Date: Jul 2007
Location: ATL
Posts: 2,288
Received 1 Like on 1 Post
the funny thing is even after i turn off my car the needle doesn't return to zero. it sometimes stays at 1000 or 2000. i think you're right though SPEED, it has been 100 degrees almost every day down here.

i thought it might've been reading too high on the tachometer because my dad floored it twice when i was only at 200 miles on the odometer. thanks for the replies
 
  #9  
Old 08-16-2007, 09:18 PM
nissan4ever's Avatar
Registered User
Join Date: Jun 2007
Location: Florida
Posts: 34
Likes: 0
Received 0 Likes on 0 Posts
My car does the same thing sometimes, even though it's 95 degrees outside. I was wondering why it does this. When I put in it drive, the rpm goes back down.
 
  #10  
Old 08-16-2007, 10:50 PM
RCK's Avatar
RCK
RCK is offline
Registered User
Join Date: Jun 2007
Location: Brooklyn
Posts: 224
Likes: 0
Received 0 Likes on 0 Posts
My G idles at about 2200 for an instant and drops to just below 1000 within 30 seconds, granted in hot summer weather. Probably a longer wait when the temperature drops.

I always wait 'til the RPMs drop to 1000 before I engage any gears or turn on A/C.
 
  #11  
Old 08-17-2007, 12:31 AM
ugaexploder's Avatar
Registered User
Thread Starter
iTrader: (1)
Join Date: Jul 2007
Location: ATL
Posts: 2,288
Received 1 Like on 1 Post
Originally Posted by RCK
My G idles at about 2200 for an instant and drops to just below 1000 within 30 seconds, granted in hot summer weather. Probably a longer wait when the temperature drops.

I always wait 'til the RPMs drop to 1000 before I engage any gears or turn on A/C.

that's exactly what happens, sometimes if i accidentally leave the AC on before i shut down the car, it idles high the next time i turn it on. i guess the ecu knows what it's doing...im kinda glad some of you are experiencing this too. sometimes it gets up to 3000 rpm on occasion.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
03sedang35
Engine, Drivetrain & Forced-Induction
1
08-29-2015 07:56 PM
jbmw002
Drivetrain
0
08-27-2015 03:01 PM
yankeefix
Lighting
1
08-24-2015 04:12 AM
gatorglaze
Intake & Exhaust
0
08-17-2015 02:16 PM
006
Intake & Exhaust
10
07-19-2015 04:30 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: RPM's reading too high



All times are GMT -4. The time now is 03:27 AM.