My 1991 C2 has now shut down for the 2nd time in torrential rain.

Has happened both times on the same downhill stretch of road in very very heavy rain.

Revs start stuttering, then everything dies. Frequent restarts needed to get the 2kms back home.

Car drys out, no problems afterwards.

Have had the car for c.9 months now. Is this sympton of a non OEM O2 sensor? Any way to 'waterproof' the sensor if yes, or should I just replace? Any other possible reasons?

Thanks. Gareth.

 

Sounds like an O2 sensor problem. OEM is the only way to go.

 

+964

 

i got mine on Amazon and no issues

http://www.amazon.com/Bosch-13924-Ox...dp/B000BZI34E/


took me an hour to install
- remove left rear wheel
- remove sheet metal surrounding O2 sensor
- spray some WD40 or PB Blaster where O2 sensor screws into the Cat.
- Remove Blower Fan (unless you have very small hands)
- Have a beer while WD40 pentrates

 

thanks - assumed as much. no idea if mine is oem or not.

are these an easy diy install, or can they be very difficult to remove?

 

I bought mine on pelican (BOSCH) it work perfect.

 

Easy to do, but you will want to buy an O2 Sensor socket. I am the exact opposite of a mechanic, and was able to change mine with no drama.

Brian

 

many thanks all!

is that a generic socket, or a unique, one-off porsche 964 o2 sensor socket?

 

Here's a second opinion - check your plug wires. I had the same issue and it was one of the wire leads from the distributor cap that was bad and caused stalling in the rain.

Generally it's really easy to check which one it is. Just start the car and use a garden hose to soak up the catalytic converter and O2 sensor. If the car doesn't die move to the the distributor caps and soak them up. You'll definitely find what causes it that way.

 

Generic. I purchased mine at Pep Boys, I think.

Brian

 

good idea - out with the garden hose tonight ;-)

 

I changed my O2 also no dramas really. I just used a box end wrench, just feed the wire through the box end of the wrench. The sensor itself cracked loose easy enough and turned out about 1 turn and then it was a tight mother the rest of the way out - had to double (interlock two) wrenches to get it out.

It is also worth taking out the rear blower. I did mine without removing the blower in retrospect it would have just been easier and quicker to remove the blower so you can plug in sensor and get it in the mount correctly.

 

I had the same stalling issue in the rain. Suspected O2 sensor or wires, until someone suggested changing my DME relay (carried a spare with me after everything I've read on Rennlist). Car has not stalled since. All evidence points to the removed DME relay being the original from 09/89 Not sure why rain would have caused stalling if it was the DME relay, but I'm happy so far.

 

Sensor uses a 22mm socket, I "borrow" the set from the Local Auto ZOne, $25 deposit and you keep it up to 90 days, deposit refunded when you return it

Best deal I found when I replaced mine a few months ago was the Bosch on Amazon, exact replacement

 

Good advice!