JebLacey

The DME is the one on the left, labled Cartronics... ? Checking it now... it wont hurt to remove it if i need to, right? I cant seem to figure out the connection.

Sorry to ask so many, but can I remove the connectors without removing the units from their mount? I have had a little difficulty here. Also, if the ig. switch is failing, would i still get all my other test lights at startup? I would think it would be an all or none kind of thing, since all of the modules that have test lights are run off the DME... including the CEL. Once again... please accept my apologies for posting so many q's.

Big time thanks... A few more q's... Where shouldl i find the CAN bus (phys. loc), and which box is the DME and the Tip control... Would a fault in any of these systems cause me not to have a CEL test at Accessory Key and no start on an intermittant basis? Or is this more than one problem? Much thanks... off to work I go.

Hi Everyone... I have posted this elsewhere as well... I am drowning here... 99 Box, Tip, 63Kmiles, strong motor, major done at 52K. Here is the deal. I started having an intermittant problem, with the transmission going to "safe" mode, and the CEL popping up. It happened in 2 consecutive drive cycles, each time, I stopped the car, and re-started... no probs for the rest of the drive. I took the car down to a local AutoZone, and had the DTC read. I only got back P0600 (Serial Port Malf... PCM trouble communicating) I have not been able to get into a Porsche shop to get the specific code, since the long weekend closed them down, plus, I am kinda stubborn. Anyhow, yesterday, noticed that the CEL was not coming on when i turned the key, before start. Then I tried to start, and it would not fire. The starter turns and turns (lights flash between P and D), but it sounds like no fuel. I came back out a few minutes later, the CEL was back, and the engine started. Now, it only starts when it wants to, which is about one out of every 20 tries, but i have noticed that the CEL is absent on the ones where it does not start, and always comes on when it does. I dont know what that means exactly. Has anyone ever experienced this? Lastly, I thought it was a problem with the selector switch in the trans... but if it was, wouldnt the top not go up or down either? Now i am thinking that i have no idea what is going on. The nearest dealership is 100miles, and I dont really trust local shops other than to read codes. Let me know what you think.... P.S. Not to complicate things, but it fired perfectly about 10 times in a row today while i had the door taken apart to fix a regulator that had jumped a rail. Once i got the door back together, it stopped working (i.e. No CEL at Accessory Key, no vroom vroom). Could a short in the door somewhere cause the CEL not to test, and the fuel not to flow?