polarity switched on the wires?

 

Sounds like it.

 

I didn't see any cut or spliced wires at first look. I will take a look when I get home tonight so see if the plug was some how installed backwards. I guess the previous owner could have installed a aftermarket fan which is why it is blowing instead of sucking. .

 

Not necessarily.

The fan puts out a goodly amount of air and some can be directed by the less than aerodynamic shape of the engine out of the engine compartment at seemingly odd places. Through the spoiler for instance.

I bet had you checked you would have found a goodly volume of hot air flowing out of the bottom of the engine compartment. When my Boxster's or Turbo's fan is running I can feel the hot air rising from around the rear of the car as the engine compartment is blasted with air from the fan.

 

I had to run out at lunch today and when I got back to the office, the fan was running so I opened the engine lid and disconnected the fan so I could actually see which way the fan was spinning. It is trying to pull air out of the engine bay and exhaust it through the engine lid vents. It isn't blowing air down into the engine bay as I didn't feel any air coming out the bottom of the car.

The plug only clips in one way into the fan so if it is reversed it has to be somewhere else, I will have to investigate further.

 

Is your battery connected in in the correct polarity?

 

I thought the fan drew air from below and pushed it out the top, but my memory could be flawed. Running the other way would be fighting physics - trying to force warm air down instead of pulling it up...

 

My fan, the one time it actually went on did push air out of the rear spoiler IIRC. I think that is normal.

 

http://www.6speedonline.com/forums/9...flow-poll.html


There was a TSB on this for a few Carrera's with Aerokits. The purge air fan in the engine compartment had the wire polarity reversed on the plug connector. On the these cars the fan incorrectly blew hot air out. (The fix is relatively simple as you just reverse the pins on the fan plug.)

The correct function is for the fan to draw in cool air. You can test this (when the fan is running) by holding a sheet of paper between the spoiler and the engine compartment lid in the area of the ventilation slots. If the fan is functioning correctly, the sheet should be sucked on to the engine compartment lid.


--------------------
Loren
RennTech.org
PCA member since 1978

 

That was also my observation. Thanks. Now I feel better.

 

Thanks for the info fpb111, mine forcefully blows the paper off the deck lid. Hopefully I can get the pins out of the plug without causing damage, I unfortunately do not have a rectangular pin tool.

 

maybe a little overkill, but these should help... http://www.ecstuning.com/Porsche-199...ronic/ES11414/

 

Hmmm. I'll have to check mine again. I didn't know about the TSB

 

I've only heard mine come at start up, for just a short time, never after motor shut off, & it's hit 105 here recently?

 

Thanks for the note about the TSB. I'ma fire up my fan with Durametric and see if Megamaid is set to suck or blow.