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

LinkBack Thread Tools Display Modes
Old 09-05-2017, 06:32 PM   #1
Registered User
Join Date: Oct 2016
Location: Johnson City, TN
Posts: 10
Runs rough. What happened?

I have a fairly new-to-me 2002 Boxster base with the 2.7 and 223,000 miles. While sitting at a red light yesterday, the car died and siunded very odd when trying to crank it. I was afraid maybe I was experiencing an IMS failure. I pushed it out if the road and after a couple of minutes tried it again and it started but ran very rough. I drove it home with the cel on and it periodically flashed. I checked the codes when I got home and had: p300,301,302,303, and 343. It will still start but runs rough. Anybody experience anything like this? Where do I start? Could it be as simple as a wiring issue with the cam position sensor or a bad sensor?

Fred111 is offline   Reply With Quote
Old 09-05-2017, 06:47 PM   #2
Registered User
Join Date: Oct 2012
Location: Cincinnati, Ohio
Posts: 284
I had a similar thing happen. The MAF cover came off and stuck in throttle body. Ran but real rough.
New MAF runs great.
Van914 is offline   Reply With Quote
Old 09-05-2017, 07:17 PM   #3
Porsche "Purist"
Paul's Avatar
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,064
Those codes indicate misfires on bank 1, and the bank 1 camshaft position sensor reporting an out of limits issue. Could be wiring, the sensor, or it could be correctly reporting a timing issue.


1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...

Last edited by Paul; 09-05-2017 at 07:23 PM.
Paul is offline   Reply With Quote

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 08:21 PM.

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