Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

97 boxster not hot starting

Recommended Posts

Posted (edited)

I have a 97 boxster. about half a year ago the car started to stall when it got above optimal operating temp. (About 3/4 in between 180 and the next notch on the temp gauge). This happened both on the highways (only with high traffic would it get this hot) and in the city. Sense then it has also started to stall (not all the time) at idle if I am at a stop light at that temp. The revs will bounce with each bounce dropping in rpm. I found that pressing the accelerator helped If I could catch it in time. I manage to plan to keep this from happening just by not letting the car get too warm, but more recently, the car has had problems starting when as warm as 180. The starter cranks but the motor does not turn over. I'll let it sit and once it is cooled down it has no problem starting. I haven't been able to find a nother post with these problems and I would really appreciate any help. I have narrowed it  down to either needing to replace the fuel pump, crank shaft position sensor. 

Edited by Bow.........

Share this post

Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

I would check the fuel system for correct pressure and delivery rates, and also check the CPS.

Share this post

Link to post
Share on other sites

For the first time, today the vehical had stalled while at optimum temp (180) while doing some tests on the car. When this happened I heard something blowing out pressure as it stalled. does anyone know if this could have been caused by a failing fuel pressure regulator. And would varying engine teps cause this due to engine compartment temp rising? Should I test The vacuum lines as well? Any input is greatly appreciated 

Share this post

Link to post
Share on other sites

Just on the off chance that it's not fuel related, have you checked your coolant level? You might also open your burp valve to ensure that there's no air trapped in the system.


Do you have the latest coolant reservoir cap - part number ending in 'O4'?



Share this post

Link to post
Share on other sites

When it doesn't start does the tachometer bounce at all when the key is turned?


Are your radiators clear of debris?

Share this post

Link to post
Share on other sites

1. CPS sensors are notorious for failing at high temperatures, cooling off and working again until .....

2. The tach not bouncing is another sign of a probable CPS sensor failure. Several of the forums have folks who posted the diagnostic methods of checking voltages on the CPS.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.