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

Reply
 
LinkBack Thread Tools Display Modes
Old 01-22-2011, 11:16 AM   #1
Registered User
 
Join Date: Oct 2008
Location: San Antonio, Texas!
Posts: 733
Trying to get a "behavioral" idea on startups

So, I'm always paranoid about not shifting out of park before the Air Pump has finished its ritual. Once the car idles down and the pump cuts off, I go ahead and take off... this usually adds a few minutes to my "quick jaunts".

Anyone else paranoid about that or is it safe to "get in and go" (of course keeping the rpms down till warm)

It may be a fluke, but I notice every time I DON'T let it do its thing, I get a CEL when I step on it (even when warm).

Thoughts?

stateofidleness is offline   Reply With Quote
Old 01-22-2011, 01:07 PM   #2
Registered User
 
Join Date: Oct 2010
Location: Atlanta, GA
Posts: 9
I have the same ritual; it just seems that is not quite ready to be driven until the Air Pump stops. I know it is subconscious but I wait too
rlbccb is offline   Reply With Quote
Old 01-22-2011, 01:38 PM   #3
Registered User
 
Join Date: Jan 2009
Location: kansas
Posts: 447
Garage
+1 here too! I know I may not have to but I always wait until it spools down before taking off. I'm not sure on the cel light though??

sean
SeanZ4 is offline   Reply With Quote
Old 01-22-2011, 03:12 PM   #4
Registered User
 
Join Date: Apr 2010
Location: Vancouver, BC
Posts: 25
What exactly does that air pump do anyways?
Roy_Josef is offline   Reply With Quote
Old 01-22-2011, 03:14 PM   #5
Registered User
 
Join Date: Dec 2010
Location: Hot Springs Village, Arkansas
Posts: 245
I don't want to stink up the garage so I put it in drive within a few seconds after starting it.
Dale_K is offline   Reply With Quote
Old 01-22-2011, 04:05 PM   #6
Registered User
 
Join Date: Aug 2005
Location: Sanford NC
Posts: 2,369
I start off quickly but gently

I get in start the engine, and then buckle the seat belt. Maybe I wait 10 seconds but I then drive off with RPMs below 2000 until the temp starts moving and 3500 until the temp shows every bit of 180, then every trip to 6k.

Since I delay not at all on any other car...
mikefocke is offline   Reply With Quote
Old 01-22-2011, 07:35 PM   #7
Registered User
 
Jaxonalden's Avatar
 
Join Date: Mar 2008
Location: Oklahoma City
Posts: 1,209
Garage
Air pump? You talking about the engine compartment fan? The car is a mid-engine and the engine compartment is very closed off. The fan you hear is simply there to ventilate out any volatile flumes that might accumulate and cause a fire. Waiting for that fan to stop before driving off has nothing to do with being drivable.

Now waiting for the temp gauge to register knowing the engine is warmed up is another.
__________________
Sadly on the outside looking in.
"Drive it like the Doctor ordered"
Jaxonalden is offline   Reply With Quote
Old 01-22-2011, 07:36 PM   #8
Registered User
 
Join Date: Oct 2008
Location: San Antonio, Texas!
Posts: 733
Nope, the air pump. It's runs on cold starts for a minute or two until the cats are warm.
stateofidleness is offline   Reply With Quote
Old 01-23-2011, 08:38 AM   #9
Registered User
 
Join Date: Jan 2007
Location: BC
Posts: 1,263
You should be able to drive with the secondary air pump running without a CEL. Have you dumped your codes?
__________________
2001 Boxster, 5 spd, Seal Grey
clickman is offline   Reply With Quote
Old 01-23-2011, 08:51 AM   #10
Registered User
 
Join Date: Oct 2008
Location: San Antonio, Texas!
Posts: 733
yea, they're due to "Secondary Air Injection" faults (I have a lingering exhaust leak). not sure why not waiting on the air pump to turn off would increase the likelihood of the CEL, but I notice the correlation between the two.
stateofidleness is offline   Reply With Quote
Old 01-23-2011, 09:04 AM   #11
Registered User
 
Join Date: Nov 2006
Location: In the garage...
Posts: 1,598
.

What the he|| are you talking about? Real Porsche cars don't have any "Park" or "Drive" things to shift into or out of...




Burg Boxster is offline   Reply With Quote
Old 01-23-2011, 10:03 AM   #12
Registered User
 
Join Date: Oct 2008
Location: San Antonio, Texas!
Posts: 733
they do on a DD in daily stop-and-go traffic while sitting in the parkinglotway, errr "high"way every day.... other occasions call for the "M"
stateofidleness is offline   Reply With Quote
Old 01-23-2011, 12:58 PM   #13
Registered User
 
Join Date: Jan 2007
Location: BC
Posts: 1,263
Quote:
Originally Posted by stateofidleness
yea, they're due to "Secondary Air Injection" faults (I have a lingering exhaust leak). not sure why not waiting on the air pump to turn off would increase the likelihood of the CEL, but I notice the correlation between the two.
There you go. Something in the secondary air system needs to be fixed. Fix that and no more CEL, and therefore no need to "wait" at startup.
__________________
2001 Boxster, 5 spd, Seal Grey
clickman is offline   Reply With Quote
Old 01-23-2011, 01:03 PM   #14
Registered User
 
Join Date: Oct 2008
Location: San Antonio, Texas!
Posts: 733
well the fact that there's a difference in exhaust 'levels'/'mixture richness' based on "waiting" or "not waiting" implies that it might be beneficial to wait, regardless of exhaust leak or not.

the fact that it throws a CEL tells me that there's different exhaust behavior if I don't wait for the air pump to do its thing. so i'm wondering if that "non-wait" behavior is harmful to the overall health of the engine/vehicle.
stateofidleness is offline   Reply With Quote
Old 01-24-2011, 09:30 AM   #15
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,602
My understanding is that the air pump and secondary air injection are emissions related, not performance related.

What seems to be happening is that there is a problem in the emissions control system and you get a CEL if you try to drive off while the air pump is still operating to avoid the CEL. You've found that if you wait until the air pump stops, then the likelihood of a CEL is much less.

The bottom line is that the emissions system needs investigation/repair. Then there will be no reason why you can't drive with the air pump operating.
__________________
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 01-24-2011, 10:27 AM   #16
Registered User
 
Join Date: Nov 2009
Location: Novi Mi.
Posts: 194
Quote:
Originally Posted by thstone
My understanding is that the air pump and secondary air injection are emissions related, not performance related.

What seems to be happening is that there is a problem in the emissions control system and you get a CEL if you try to drive off while the air pump is still operating to avoid the CEL. You've found that if you wait until the air pump stops, then the likelihood of a CEL is much less.

The bottom line is that the emissions system needs investigation/repair. Then there will be no reason why you can't drive with the air pump operating.
+ 1 sounds like your secondary air system, here is a link to repair it. good luck.
www.nutrod.com/nutrod/home.html
just click on (secondary air system)

jbs986 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 04:13 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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