Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 02-11-2015, 05:38 AM   #1
Registered User
 
Join Date: Aug 2014
Location: Oklahoma
Posts: 156
Garage
Idle RPM

What is the correct RPM that the 2.5 m96 should idle at? Mine idles at about 800 and this seems low... lots of vibration. reasons this could be happening, fixes? thanks
OklahomaBoxster is offline   Reply With Quote
Old 02-11-2015, 05:47 AM   #2
Registered User
 
Join Date: Jul 2009
Location: Arlington Heights, IL
Posts: 1,557
Sounds normal. Even modern Porsches idle at this RPM, after they come of fast idle (1,200ish RPM about 60 seconds worth). Check your motor mounts.
Flavor 987S is offline   Reply With Quote
Old 02-11-2015, 11:51 AM   #3
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,470
750-800 RPM is normal for a warm engine.

If you have a rough idle which creates engine/body vibrations then look into idle issues (ICV, MAF, vacuum leak, dirty throttle body, misfire, etc)

If the idle is fairly smooth but you feel engine vibration in the body then look into mounting issues like motor or trans mounts.
__________________
1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
thstone is offline   Reply With Quote
Old 02-11-2015, 10:53 PM   #4
Registered User
 
Join Date: Mar 2014
Location: So Cal
Posts: 231
Garage
800 is fine for a warm engine, it's when it gets over 1000 warm when you need to start looking for vacuum leaks and such.

On a side note, my E34 BMW idles at 637-642 rpm at idle when warm, it had a bad vacuum line on the EGR side that caused it to idle over 800 before I isolated and repaired it.
mgfranz is offline   Reply With Quote
Old 02-12-2015, 06:24 AM   #5
Registered User
 
bwillia080261's Avatar
 
Join Date: Oct 2014
Location: Fort Collins, Co.
Posts: 74
Clean your throttle body and MAF sensor. I'll bet that helps you out with your idle issues. Did for me.
bwillia080261 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 01:28 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page