Welcome to the North American Subaru Impreza Owners Club Saturday December 10, 2016
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 04-02-2005, 01:32 AM   #1
jklauza
Scooby Newbie
 
Member#: 84339
Join Date: Apr 2005
Question What rpm should a 2001 2.5RS idle at?

I just bought this car a few weeks ago. It idles at around 500 after it's warmed up. But when I first start it up it's around 1500.

Is this correct?
The 500 after it's warmed up seems low to me.

Thanks
* Registered users of the site do not see these ads.
jklauza is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-02-2005, 02:01 AM   #2
HolyCrikey
Scooby Specialist
 
Member#: 66776
Join Date: Jul 2004
Chapter/Region: South East
Vehicle:
2005 Mazda3 Hatch
Titanium Grey Metallic

Default

Naw, 500 is about what I get on my 02 RS. After its nice and warm it'll usually be right round 900. Do you have the air on? Or A/C? That'll flucuate the idle as well.
HolyCrikey is offline   Reply With Quote
Old 04-02-2005, 06:52 AM   #3
Hayes
Scooby Specialist
 
Member#: 11808
Join Date: Oct 2001
Location: Cape Coral,FL
Default

Mine jumps up to 1500-2000 rpm on start-up depending on how cold it is. I tap it down quickly and it goes to 1200 or so. Fully warmed up it idles ~ 750 rpm. The marks on the tachometer are not linear so I think your realy idleing at around 750 rpm.
Hayes is offline   Reply With Quote
Old 04-02-2005, 02:16 PM   #4
HolyCrikey
Scooby Specialist
 
Member#: 66776
Join Date: Jul 2004
Chapter/Region: South East
Vehicle:
2005 Mazda3 Hatch
Titanium Grey Metallic

Default

Quote:
Originally Posted by Hayes
Mine jumps up to 1500-2000 rpm on start-up depending on how cold it is. I tap it down quickly and it goes to 1200 or so. Fully warmed up it idles ~ 750 rpm. The marks on the tachometer are not linear so I think your realy idleing at around 750 rpm.
I agree completely. Mine is exactly like this as well.
HolyCrikey is offline   Reply With Quote
Old 04-02-2005, 02:17 PM   #5
allsubaru83
Scooby Specialist
 
Member#: 60122
Join Date: Apr 2004
Chapter/Region: NWIC
Location: Tacoma
Vehicle:
1986 911 Turbo
Guards Red

Default

Quote:
Originally Posted by Hayes
Mine jumps up to 1500-2000 rpm on start-up depending on how cold it is. I tap it down quickly and it goes to 1200 or so. Fully warmed up it idles ~ 750 rpm. The marks on the tachometer are not linear so I think your realy idleing at around 750 rpm.
that is exactly what mine does, your idle is normal, no reason to think it isnt man
allsubaru83 is offline   Reply With Quote
Old 04-03-2005, 11:49 AM   #6
legacyace
Scooby Newbie
 
Member#: 84364
Join Date: Apr 2005
Location: Kla
Vehicle:
1997 BG-5
Ones Black and Ones White

Default

500 seems a bit to the down side, an engine should idle at about 750rpm, when at normal running temp.
At start up its alright to idle at 1500rpm coz thats the automatic choke trying to keep the vehicle engine running at the cold temp.
legacyace is offline   Reply With Quote
Old 04-04-2005, 12:55 AM   #7
SubaDrew2.2L
Scooby Newbie
 
Member#: 45656
Join Date: Oct 2003
Location: Warner Robins, GA
Vehicle:
2000 Impreza OBS
Green w/goldish bottom

Default

about 700rpm is what I get once it's warmed up (and 1300 ish when first cold). Although I just reset my ECU and it was at like 100-200rpm for a few minutes when I started up!!! But now it's back to normal.
SubaDrew2.2L is offline   Reply With Quote
Old 04-05-2005, 11:55 PM   #8
Impreza_RX
Scooby Newbie
 
Member#: 68015
Join Date: Aug 2004
Chapter/Region: NWIC
Location: WA
Vehicle:
2006 WRX TR
Steel Gray Metallic

Default

300rpms is mine. i dunno if i read it wrong or what, but the needle is on the 3rd line
Impreza_RX is offline   Reply With Quote
Old 04-06-2005, 12:52 AM   #9
Charge
Scooby Specialist
 
Member#: 3313
Join Date: Dec 2000
Chapter/Region: MWSOC
Location: Cincinnati
Default

Quote:
Originally Posted by advanrs
300rpms is mine. i dunno if i read it wrong or what, but the needle is on the 3rd line
That's not 300rpms. The first one is a little off. The first hash mark that shows, I think, is 500rpm.

If I wasn't so lazy, I'd run out and snap a pic of my tach and let you see how you can figure it out. Or if someone else can find a pic of a 99-01 tach(I'm not sure if 02's are arranged exactly the same or not), we can tell from that.
Charge is offline   Reply With Quote
Old 04-06-2005, 05:00 PM   #10
AJs99RSAWD
Scooby Newbie
 
Member#: 84302
Join Date: Apr 2005
Default

Well since I really am a DSM guy, idle was always a problem with my car. One thing to lower or raise the idle would be to adjust the BISS screw near the Idle Control Motor. Not sure if a RS would have the same adjustments, but it's food for thought.
AJs99RSAWD is offline   Reply With Quote
Old 04-06-2005, 05:30 PM   #11
Al_Smokemcrack
Scooby Specialist
 
Member#: 66640
Join Date: Jul 2004
Chapter/Region: Tri-State
Location: Rochester, NY
Vehicle:
1997 Legacy Outback
Glacier White

Default

The first mark on the tach after 0 is 500rpm. Acceptable idle speed after warmup for the EJ25 is 700-900rpm according to various FSMs. Mine idles at 775.
Al_Smokemcrack is offline   Reply With Quote
Old 04-06-2005, 06:15 PM   #12
powerlabs
Scooby Specialist
 
Member#: 45790
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2006 Corvette C6 Z51
SUPERCHARGED

Default

My '99 idles at exactly 700RPM, as monitored through S-AFC rpm signal pickup.
If your engine idle drops below 650RPM you will notice it; the engine will shake the car and feel like it is about to stall.
There is no way your engine is idling at 500RPM. It would sound horrible and shake the whole car, then probably stall.
powerlabs is offline   Reply With Quote
Old 04-07-2005, 12:43 PM   #13
Randoramma
Scooby Newbie
 
Member#: 60649
Join Date: Apr 2004
Chapter/Region: NWIC
Location: seattle
Vehicle:
00RS EJ205 swap

Default

Mine is around 500.

Randy
Randoramma is offline   Reply With Quote
Old 04-07-2005, 02:23 PM   #14
DreddRS25
Scooby Specialist
 
Member#: 51642
Join Date: Dec 2003
Chapter/Region: TXIC
Location: San Antonio, Texas
Vehicle:
2008 WRX
WRB

Default

Quote:
Originally Posted by powerlabs
My '99 idles at exactly 700RPM, as monitored through S-AFC rpm signal pickup.
If your engine idle drops below 650RPM you will notice it; the engine will shake the car and feel like it is about to stall.
There is no way your engine is idling at 500RPM. It would sound horrible and shake the whole car, then probably stall.
Right at 700 for me too. Right on the second small hash mark.

Intial startup is at 1400 then slowly works its way down to 700. It jumps to 900 if I have the AC on.
DreddRS25 is offline   Reply With Quote
Old 04-07-2005, 02:47 PM   #15
powerlabs
Scooby Specialist
 
Member#: 45790
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2006 Corvette C6 Z51
SUPERCHARGED

Default

Quote:
Originally Posted by Randoramma
Mine is around 500.

Randy
No its not. If your engine was idling at 500rpm it would be stalling. Read my post.
powerlabs is offline   Reply With Quote
Old 04-07-2005, 06:57 PM   #16
anonymous_wolf
Scooby Specialist
 
Member#: 57780
Join Date: Mar 2004
Chapter/Region: VIC
Location: Richmond B.C.
Vehicle:
2000 RS sedan, GC6
Blue Ridge Pearl

Default



my idle,
700rpm
anonymous_wolf is offline   Reply With Quote
Old 04-08-2005, 02:50 AM   #17
Al_Smokemcrack
Scooby Specialist
 
Member#: 66640
Join Date: Jul 2004
Chapter/Region: Tri-State
Location: Rochester, NY
Vehicle:
1997 Legacy Outback
Glacier White

Default

The SOHC EJ25 only revs out to 6100RPM? That's no fun.
Al_Smokemcrack is offline   Reply With Quote
Old 04-08-2005, 10:49 PM   #18
jklauza
Scooby Newbie
 
Member#: 84339
Join Date: Apr 2005
Default

Ok, cool guys thanks for the input.

That picture and what you guys said makes since now.

I'll worry no more.

Jklauza
jklauza is offline   Reply With Quote
Old 04-08-2005, 11:19 PM   #19
Charge
Scooby Specialist
 
Member#: 3313
Join Date: Dec 2000
Chapter/Region: MWSOC
Location: Cincinnati
Default

Quote:
Originally Posted by Al_Smokemcrack
The SOHC EJ25 only revs out to 6100RPM? That's no fun.
Actually...fuel cut-off is like 6250 or 6500, I can't remember which. The real problem is that there isn't much power made above like 4500RPM. New cams, and you can easily take it up to 7000RPM. Valve-train upgrades are recommended...but not always necessary. With upgrades, 8000RPM is possible.
Charge is offline   Reply With Quote
Old 04-09-2005, 07:36 PM   #20
powerlabs
Scooby Specialist
 
Member#: 45790
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: New Jersey
Vehicle:
2006 Corvette C6 Z51
SUPERCHARGED

Default

Quote:
Originally Posted by Charge
Actually...fuel cut-off is like 6250 or 6500, I can't remember which. The real problem is that there isn't much power made above like 4500RPM. New cams, and you can easily take it up to 7000RPM. Valve-train upgrades are recommended...but not always necessary. With upgrades, 8000RPM is possible.
Fuel cut is 6250RPM, and horsepower is at its MAXIMUM at 5600RPM, so there is much power above 4500RPM. Its past 5.6K that it starts to drop off. Valves will float around 6800RPM from what I hear, so if you install cams to make power at that range you will need valve springs and retainers to go with it.
No fun? It makes the exact same peak power as the DOHC (I assume that's what al was comparing it with), with more torque, a fatter power band and it only revs 250RPM less.
powerlabs is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Kinda new... looking at buying a 2001 2.5RS btleier Newbies & FAQs 3 09-10-2009 05:37 AM
What Rpm Should I Launch At????? SKUNK2.5 General Community 3 03-28-2008 02:21 PM
2001 2.5RS at Ed Voyles Subaru Noir South East Region Forum 14 11-07-2004 06:57 PM
What rpm should an autotranny car be running at? Dkong Canada Region Forum 5 04-27-2003 04:23 PM
Who has a 1997-2001 2.5RS Blue and was at Outback Stake House in Largo on Friday? cpages2 South East Region Forum 5 04-30-2001 09:10 AM

All times are GMT -4. The time now is 09:06 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2016 Axivo Inc.
Copyright ©1999 - 2016, North American Subaru Impreza Owners Club, Inc.