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Recommended Posts

Posted (edited)

1998 986 2.5 5 spd 75k miles

I've had some squeaking at low RPM and the car seemed a bit sluggish. After checking the throttle body it seems exessive oil was indeed coming from the J tube delivered by the Air Oil Separator. I got an ocassional P0410 and P1411. I also noticed the whine at startup seemed more prominent. I thought that might be the Idle Speed Adjuster which was quite dirty with soot.

Since I had all the air plumbing off I decided to vacum and degrease the engine (covering any open holes with tape) and power washing carefully. Then vacum up the water, dry with rags and finally blow awat any last bits of water. I put the throttle body back on but left the AOS disconected and the Idle Ajuster to see if it would spit out any guck. When I tried to start the engine it made a bad sound, clunking, so I put everything back together with the new AOS.

I think I made two mistakes-trying to start the engine with the air intake off and the Idle Adjuster plugged in but not bolted on. And pressure washing the engine eventhough I did try to avoid electrical connections. Water bad for electical parts, I know.

Car runs fine. After a few minutes it found idle at around 780 RPM. Still a prominent whine on startup (its cold in New England). No CEL but the Durametric shows:

"P0341 - Porsche fault code 112 - Camshaft sensor Short to B+ "

Long story but what's with the Cam Sensor B+??

Thanks

Edited by Baconaire
Posted

Well one of the cam sensors is sitting on top of the bank 1 head, right next to the oil separator. Short to B+ indicates the sensor is seeing battery voltage instead of the actual voltage being reported by the sensor. This could mean you have an open circuit or an actual short. Either way I would check the wiring to the sensor and make sure nothing was damaged or disconnected while you were in there.

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