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Non-Varioram Air Housing Temperature Sensor Replacement
 
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Pelican Technical Article:

Non-Varioram Air Housing Temperature Sensor Replacement

Steve Vernon

Time:

30 minutes30 mins

Tab:

$30 to $60

Talent:

**

Tools:

Hands

Applicable Models:

Porsche 993 Carrera (1995)
Porsche 993 Carrera 4 (1995)

Parts Required:

Temperature sensor

Hot Tip:

Lubricate the rubber gasket before installing

Performance Gain:

Proper information to the EMC

Complementary Modification:

Replace air filter

On the 993's induction system the MAF sensor is used to determine the volume and density of the air entering the throttle body, the airs temperature is computed by a separate air temperature sensor incorporated into the intake elbow. This sensor is very important the computing the proper air to fuel ratio in the engine. If you are getting an error code for the air intake sensor you should replace this sensor right away.

Replacement is quick and easy and on non-Varioram motors you do not have to move anything out of the way.

The intake air temperature sensor is located on the intake elbow between the MAF and the throttle body (red arrow).
Figure 1

The intake air temperature sensor is located on the intake elbow between the MAF and the throttle body (red arrow). The sensor is easily accessible by just opening the deck lid.

Begin by removing the air intake temperature wiring connection (red arrow).
Figure 2

Begin by removing the air intake temperature wiring connection (red arrow). Simply squeeze in the clip and pull it straight back and off. If you need a little extra room you can remove the idle stabilization valve wiring connection (yellow arrow) in the same manner.

The sensor sits in a rubber grommet in the elbow (red arrow).
Figure 3

The sensor sits in a rubber grommet in the elbow (red arrow). You can simply pull it out from the elbow at this point.

It is a good idea to place a little lubricant on the rubber seal in the elbow or on the area where it mounts on the sensor to ease in installation.
Figure 4

It is a good idea to place a little lubricant on the rubber seal in the elbow or on the area where it mounts on the sensor to ease in installation. Installation is the reverse of removal

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