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Loren

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Everything posted by Loren

  1. Hmm... may be tough on a 996 depending on where you want to measure it at. If you look at the GT3 and GT3 Cup cars they take it off the oil return at the oil/water heat exchanger - but that is a different engine and heat exchanger than a normal 996. On a 996 that is where the water temp is taken. Likely the most accurate place to measure. Perhaps one of the racing shops has done this?
  2. Sounds like the the backup light switch. The connector should come off - most Porsche connectors have a latch type mechanism. It does not have a gasket so if it is leaking (and not just loose) you'll need to replace the switch (996 606 133 00).
  3. Congrats and welcome to the board! :welcome: You will want to take care of your backfires/popping ASAP. A forceful backfire is known to blow the (plastic) air box (I speak from experience). Once again welcome!
  4. According to the parts list the part numbers are the same as the 996. My 996 DIY is here
  5. Depends on the model year. On a 996 they changed to one piece in MY02 whereas earlier cars had 3 pieces.
  6. I'm sure you mean PCM 2 (not PCM 3). There have been a half dozen TSBs for problems on the Cayenne with PCM2 so your dealer should likely have a look at your car. Interesting also is that the MY05 Cayenne's will get PCM 2.1 which is a updated and upgraded system.
  7. The only other schematic with a 2nd phone diagram is the PCM schematic - so perhaps the wiring is the same. Here it is...
  8. When you see "trim", it means "compensation". As far as I know GM invented this term. Fuel trim in the positive side indicates the computer (DME) is adding fuel and, of course, the negative side indicates computer is subtracting fuel. For example - As the pump pressure starts to decay or the fuel filter begins to clog, the computer will respond by adjusting long-term fuel trim numbers in an attempt to get short-term fuel trim back to zero correction. The computer keeps tables of both short term and long term compensation (or trim). If you do a Google search on "fuel trim" you will likely come across more technical articles on it - but not likely aimed at Porsche cars.
  9. The codes mean that you are getting too much gas and the DME can not compensate for it. My info comes from the Porsche ODB II manual.
  10. US/Canada cars do not get phones so they do not have the wiring. Are you talking about option M618? Because the wire colors don't match for the Handy option.
  11. P300 Is a misfire in several cylinders - P301 is cylinder 1, P302 is cylinder 2, P303 is cylinder 3. If the spark plugs and wires on that side of the engine are ok - then you may have bad intake leak on that side - or a VarioCam sensor problem on that side.
  12. Hmm... I don't know of a new harness. Only new harnesses are for TT Aerokit and Cab. Have they checked the two microswitches? And have they done Scouser's trick of cleaning the connector electrical connections (corrosion)?
  13. P1128 could be any intake (or exhaust leak). This includes the oil filler cap and hose, the oil separator, gas cap, as well as any loose or leaking hoses. Do a search for P1128 and you will find several lengthy discussions and several solutions.
  14. Yes. you can get an OBD II Manual for your model year/DME. The bad news is these were $200 when I bought mine 2 years ago - now I understand they are $800 :eek: So be sure and get a quote before ordering
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