Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

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)

How easily does a MAF become faulty?

Recommended Posts

I have a 2001 996 Carerra 6-speed 72k miles and have been experiencing a slow to respond throttle and then surge in RPMs. Based on posts for similar symptoms, I cleaned the throttle body. When that did not improve the condition I cleaned the MAF using CRC MAF cleaner. This seemed to temprorarily resolve the problem for a day, however, I am now experiencing the surging issues intermittently again. I read a short debate in a post that a MAF does not easily become faulty and that if properly cleaned should resolve most problems. Rather, it is was suggested that replacement of the MAF by users of this forum is primarily out of convenience and is seldom necessary.

Does the MAF on a 996 become faulty? Just wondering if I should invest in a new one if a second cleaning does not permanently resolve my problem or start considering other causes. Thanks in advance for your thoughts -


Edited by JeremyW
Link to comment
Share on other sites

I have cleaned loads of these sensors over the years and found it to be a waste of time. If the sensor has a problem from contamination, cleaning it is only a temporary fix at best and you often find the sensor still reads volume on the low side. These sensors fail often or display incorrect readings on all german vehicles that use this type and need replacing with the newest updated part. Having said all that, I'm not sure you have a MAF sensor issue. I would verify that there are no codes then inspect for a vacuum leak and check fuel pump pressure and volume.

Link to comment
Share on other sites

Loren, Wvicary - Thanks again for your thoughts. I unhooked the MAF sensor and although it did seem to improve a little bit my hesitation and surging problem did not disappear. I also stopped by autozone and there are no fault codes stored. I suppose it is now on to vaccum lines and fuel pressure, unless you have a better suggestion. Is there a clear diagram of vaccum lines out there other than the parts schematic? Also, what is the best way to check fuel pressure? I did verify that my fuel filter was replaced approximately 10k ago during the 60k service. Thanks again -


Edited by JeremyW
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

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.