Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

LinkBack Thread Tools Display Modes
Old 09-26-2015, 03:30 AM   #1
Registered User
Join Date: Sep 2015
Location: Pennsylvania
Posts: 1
2000 Boxster intermittent stall issue

My 2000 Boxster 2.7 used to run rough, and would occasionally stall while idling at intersections, and, after a while every now and then at rapid acceleration it would just flat out shut off for about two seconds and then take off again. It also used to lope at idle, going from 500 to 1,000 rpms. In the morning, if I did not let it idle roughly a while until it smoothed out, it would stall and run rough until I left it idle for a while. I cleaned throttle body and replaced the MAF, and all spark plugs, ignition coils, and spark plug tubes. The car now idles without loping. However, it still stalls intermittently at intersections and when pulling out, and every now an then there is that hesitation at rapid acceleration. When it dies when pulling out, I can just flip the key to off and then on, and it will run. On one occasion, it was like the car was stuck at idle, with no response when I pumped the gas pedal, and I had to turn it off and then on again to get the throttle to respond. I always use 93 octane, and have tried adding an octane boost, with no change whatsoever. Is this possibly an issue with the egas? I would appreciate any advice on this.

daysalw is offline   Reply With Quote
Old 09-26-2015, 08:59 AM   #2
Certified Boxster Addict
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,614
Assuming that the CEL isn't on and there are no codes pending, I'd start with checking the throttle position sensor and the fuel pressure.
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 06-27-2016, 08:15 AM   #3
Santa Barbara, CA
Join Date: Mar 2016
Posts: 38
I've chased this intermittent stall or hesitation issue on my '98 2.5L MT 138k Boxster for several months and replaced all the usual items myself: plugs, coils, MAF, O2 sensors, fuel filter, cleaned Throttle body & checked fuel pressure. The car ran great, but still had the occasional hiccups when accelerating.

In desperation, I took the car to a local indie shop and then to the Santa Barbara P- dealer and neither of them (and their fancy machines) could figure it out. They did take my money though and wanted another 4 hours to check my wiring....

Then, thanks to a suggestion to check for vacuum leaks from "itsnotanova" (via his Plano, TX Porsche dealer), I found the culprit to be a slight leak at the coupling between the top breather hose and the AOS. I fixed the leak and the hesitation is no more.

Many thanks to Woody & the guys in Plano.

jvfante 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 10:48 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