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

Reply
 
LinkBack Thread Tools Display Modes
Old 12-05-2011, 06:55 AM   #1
Registered User
 
Join Date: Jul 2011
Location: Abilene, Tx
Posts: 12
POP, RATTLE, & SHAKE ... cold start ups

I currently have an 01 manual, base model with 76K miles, living in west Texas. We rarely get any cold weather, but lately every start up during the past week has been rough to my ears. I've had the car for only 5months.

It could be the cold weather, but everytime i start up the car, like the title, it shakes, rattles, and even shut down on me completely. The noise lasts for about 3 painful minutes. The car has a popping noise, definately in the engine area. Then it will start to rattle and shake. There are NO trusted repair shops around here that i've found and Dallas is a 3hr drive.

Any suggestions? I will upload youtube vid after class of the noise.

__________________
2001 Boxster
2003 Miata
Aimee4588 is offline   Reply With Quote
Old 12-05-2011, 11:22 AM   #2
Registered User
 
gregdacat's Avatar
 
Join Date: May 2008
Location: Newport, KY
Posts: 202
Once it settles down and starts running "normal" check and see if you can remove the oil fill cap while it is running. If not, or if it is difficult to remove (suction) it is most likely your AOS (Air Oil Separator) Mine had the exact same symptoms just before the AOS went south.
__________________
Greg
2002 Triple Black, Desnorkled, Bumper Plugs, LN IMSB Upgrade
gregdacat is offline   Reply With Quote
Old 12-05-2011, 01:33 PM   #3
Registered User
 
Join Date: Sep 2011
Location: eastern NC Crystal Coast
Posts: 413
My exhaust rattles when cold. The previous owner told me it was the converters. After they warm the noise stops.
milliemax is offline   Reply With Quote
Old 12-05-2011, 08:26 PM   #4
Registered User
 
Join Date: Jul 2011
Location: Abilene, Tx
Posts: 12
I was reading in previous posts that it does happen to other 986-ers but only for a few seconds. Mine lasts for at least 2 to 3 minutes.

I took it in to get a diagnostic and they couldn't find anything at all. Suggested that it might just be moisture build up due to the cold and to try using dry gas. Has anyone used that before? I don't want to pour things into my car that might just harm it even more.

@gregdacat thanks for the suggestion. I looked up AOS cost and repairs, looks like it'll be a pretty penny.

@milliemax: how long until the noise goes away from start up?
__________________
2001 Boxster
2003 Miata
Aimee4588 is offline   Reply With Quote
Old 12-06-2011, 05:35 AM   #5
Registered User
 
jcb986's Avatar
 
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
Dry gas...??? Every time I stick my finger in gas it's wet. I would start with a good tuneup, new plugs for sure, timing check, coil paks removed and checked and the timing sensor checked. The sensor can cause your problems. Get a good indy who knows Porsche's.
__________________
http://i768.photobucket.com/albums/x...6/PC120055.jpg

Old Hippie Young Heart
2000 S/3.2 Liter/Tiptronic/Boxster S Sport Package/Cruise Control/Slate Grey Metallic
Red Special Leather Interior/Red Floor Mats/Red Hand Painted Instrument Dials/Roll Bar/Windstop
Small Carbon Package/Leather Wrap Carbon Wheel/Center Console Exterior Color/Alum Carbon Shift Knob
AM/FM Radio w/CD Player & Changer/Digital Sound Package/18" Turbo Wheels/Wheel Caps w/Colored Crest
jcb986 is offline   Reply With Quote
Old 12-06-2011, 05:44 AM   #6
Registered User
 
Join Date: Dec 2010
Location: Hot Springs Village, Arkansas
Posts: 245
Maybe disconnect the electrical connector at the MAF and see if the car runs well afterward. I've never done it myself but I've read here that the car's computer reverts to a lookup table when it looses communication with the MAF. In other words it doesn't hurt the car to temporarily disconnect the MAF as a diagnostic test. It's worth a shot since disconecting the MAF is so easy. I'm no expert, so take this with a grain of salt.
Dale_K is offline   Reply With Quote
Old 12-06-2011, 06:25 AM   #7
Registered User
 
Join Date: Sep 2011
Location: eastern NC Crystal Coast
Posts: 413
The exhaust rattles until it gets hot. A few miles ? I hear it when I back out of the garage and when I get to my destination , it's gone. The noise is in the converters. Good luck with your car !
milliemax is offline   Reply With Quote
Old 12-06-2011, 12:43 PM   #8
Registered User
 
jcb986's Avatar
 
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
I notice the guys keep saying converter, but if your engine is popping, "misfire", then it's a coil pak or timing sensor issue, so my question is the car misfiring and quitting or just the popping rattling noise.
__________________
http://i768.photobucket.com/albums/x...6/PC120055.jpg

Old Hippie Young Heart
2000 S/3.2 Liter/Tiptronic/Boxster S Sport Package/Cruise Control/Slate Grey Metallic
Red Special Leather Interior/Red Floor Mats/Red Hand Painted Instrument Dials/Roll Bar/Windstop
Small Carbon Package/Leather Wrap Carbon Wheel/Center Console Exterior Color/Alum Carbon Shift Knob
AM/FM Radio w/CD Player & Changer/Digital Sound Package/18" Turbo Wheels/Wheel Caps w/Colored Crest
jcb986 is offline   Reply With Quote
Old 12-06-2011, 03:49 PM   #9
Registered User
 
John99Boxster's Avatar
 
Join Date: Oct 2011
Location: Wilmington, NC
Posts: 229
Garage
I get the normal "rattling sound" for 1 or 2 seconds when I start the car and then it is very smooth. The 1 to 2 sec. rattle comes from the tensioner.

Shaking and Popping is abnormal. I would look at 1) Spark Plugs 2) Ignition Coils

__________________
1999 Boxster
Ocean Blue Metallic/Savannah Beige | Tiptronic | Custom Rear Spoiler | 17" Turbo twist | Red Brembo Calipers | GAHH Top w/Glass Window | Tinted Windows | Cruise Control | Leather Interior | Heated Seats | Color Wheel Caps | Traction Control | Debadged
John99Boxster 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 05:50 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