Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

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)

mk1 Aero Wing Questions

Recommended Posts

OK So I just installed an mk1 Aerokit rear wing onto my '99 996 C2.

Looks great, but looks are not everything. I bought this to balance out the aero with the rest of the mk1 aerokit already installed.

I instruct at the local track and am hoping this gives a bit more high speed stability at over 100mph.

Anyway, I was told by the previous owner that the C2 OE wing harness will swap over. It does not.

The C2 harness has additional wiring for the wing motor and 4th brake light and most importantly the position sensor wires are permanently attached to the wing motor gearing.

So since my rear deck lid was already damaged by a previous owner's botched attempt to fasten a TechArt wing, I decided to cut the harness off.

I reused the cut harness & also the fan motor/ engine bay light housing for the Aerokit wing. 3 screws fasten it in the proper location. So far so good.

However while the engine compartment light now works, the engine bay vent fan does not seem to be coming on even after getting the car pretty hot on a long test drive.

First question is where is engine bay ambient temperature sensor? or does the fan come on due to engine temps?

Next question is, if this harness will not allow proper operation of the fan, can somebody give me the correct part # for the correct Aerokit harness.


- Bill

Link to comment
Share on other sites

  • Admin

The engine compartment purge fan rarely comes on. Mine has only come on twice -- and I live in 90 plus degree California! Here are the conditions the fan comes on at.

From the service manual...

"Switch-on conditions for engine compartment fan (this fan pulls air into the engine compartment) The engine compartment fan is switched on when the engine compartment temperature is > 176 degrees F or the coolant temperature is > 216 degrees F.

After-running of engine compartment fan

If the ignition is switched off and the engine compartment temperature is more than 140 degrees F, the DME control module remains in readiness for another 20 minutes. During this time, the engine compartment temperature is retrieved every 10 seconds. If the engine compartment temperature is > 185 degrees F , the engine compartment fan is switched on for 20 seconds. If the engine compartment temperature is still > 185 degrees F after this time, the fan remains on for a further 30 seconds."

Link to comment
Share on other sites

  • 2 weeks later...
Thanks Loren,

Just out of curiousity, do you know where the engine compartment temp is measured?

- Bill

Bill: I am also looking for the engine compartment temp sensor location. Did you ever hear back on your question? My fan (2002C4S) runs as soon as engine temp hits 180 + (f) and runs for 20 mins after shut down. I also get a "blower motor failure warning" from the on board computer and a blinking temp light.

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.