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Herc

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  • Posts

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  • From
    Utah
  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2008 997 TT, Champion 700 kit
  • Former cars
    Porsches and Vipers

Herc's Achievements

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  1. Looks like the problem is going to be the after market daytime running lights. Seems they are wired incorrectly into the "15" power and are shorting out the system. When unplugged the problem went away. Weird one.
  2. Yep, all wiring was checked and they had Porsche on the phone when they were running the CAN line test, which had them unplugging and re-plugging just about everything, wires, relays, modules etc........ It would be interesting to find out what exactly is bad inside the DME, has to be a bad/cold joint.
  3. I didn't think it was the GIAC flash and it appears I was right. I had them re-flash to stock and it did not fix the problem so they have ordered a new DME. Guess I am one of the very few unlucky ones with a bad DME. How often have you heard of that?
  4. Having them flash to stock tomorrow. The CAN line test showed that as soon as the DME was hooked up the neg signal went to zero meaning the DEM was grounding out the CAN bus. Weird thing, the tech working on the car is able to get it to fail/no start at will; starts fine then he turns it off, key back to on for 5 min then off, key back to on and it fails, then back to off for 5 min and it will start fine. They had Porsche on the phone while the test was running, Porsche would not send them the protocol for the test due to proprietary issues, so good thing he was able to get to fail for the test. Although this is the exact test I mentioned over a month ago after downloading a Porsche electrical diagnostic pamphlet.
  5. Well they ran a full CAN line test, 4 hrs worth, and are saying it is the DME. They were able to get it to fail while hooked up to the tester and all other modules checked out OK.
  6. Dealership is running a CAN line test tomorrow, something I mentioned over a month ago, also received a heads up on checking the CAN gateway, another thing I mentioned to them over a month ago, they can't seem to let go of it being a DME issue. Guess the CAN test will look into both. We'll see, CAN gateway module is pretty cheap at $190. Codes only show up when the car is having the problem, when it starts it shows no codes.
  7. Looks like a 993, 1997, instead of a 2008 997.
  8. Tech told me he tried a different ignition switch, no change.
  9. Only thing I see on the list for a 997 was a clutch actuator, says won't go into gear?
  10. Thought about having them flash mine back to stock but if it didn't work he would still suspect the DME it's self. Not sure how the car would run on a stock flash with the mods.
  11. Thanks. I was originally thinking something like that after downloading Porsches electrical diagnostic pamphlet but the tech keeps going back to the PAS as the controlling hub so to speak. I mention that to him next week.
  12. Thanks for all the input so far. Champion Motorsport does a lot of these cars and from talking to them they have not seen this problem unless it had something to do with grounding issues not DME issues, not that it couldn't. I have owned numerous vehicles with tuned DMEs, Ducatis, Harleys, Vipers and other Porsches, never had a software tune problem that usually shows as some sort of drivability issue, surging, missing etc. My problem is faults from other systems, not sure what bad DME software would have to do with a "depress clutch" message. I was also surprised that nobody at this dealer know about the 30s override for a bad clutch micro and the ensuing "depress clutch" message.
  13. As far as a re flash, the loaner DME is an option after I hear what they come up with next week. Both Champion Motorsport and GIAC have a pretty good rep and with the mods on the car, (GT3 TB, 65mm turbos, larger intercoolers etc..) I'm not sure if factory software will work. If it was the software you would think there would have been a problem in the last 5800 miles. Now the DME having an internal fault I might buy, cold solder fault, but it is strange that manipulating electrical components and wires in the drivers foot well area seems to affect the problem. If nothing comes out of next weeks problem shooting I'll go with the loaner DME with stock tune and see if that makes a difference, if so then it would point to an internal fault in the current DME which would not be caused by different software but I will still need a new DME.
  14. I don't think it's the DME. I bought the car last Nov, 1 owner from South Fla, the 1st owner had Champion Motorsport install the 700 Werks One kit along with led driving lights, .2 rear facia and led lights, GT2 wing and 20 in Champion wheels when the car was fairly new, this included the GIAC flash for the mods. I have the full maintenance history, 5600 miles when I bought it and it has had 4 to 5 oil changes, clutch slave replaced, battery replaced Aug 13 and a few 'campaigns" done at the dealer. I received the car early Nov 13, the first 3 times I drove it there were no issues, it did give me the "depress clutch" once when trying to start but nothing else and started when I recycled the key. Drove it one day to a part time job i have and it sat outside in 20 to 30 F degree weather, went to start it at lunch time and got- key on then "PSM" and "ABS" fail along with "oil temp inop", key to start and got "depress clutch". Let it sit until I got off and the same thing so I got up in the drivers foot well and manipulated the pedals and clutch switch along with some wires, got it started. Next day I replaced the clutch micro, not the cruise disconnect, seemed to work fine. Drove to my friends house for Thanksgiving and it sat outside for a few hours again in 20 to 30 F. Went to go home and same as above. Next morning I went back and changed the battery, not knowing it was new in Aug, installed the Interstate 94R, started fine and off to home. Next outing same thing, this time I repeatedly manipulated clutch and brake switches and disconnected the neg cable on the battery, key on then off numerous times, after about 30 min I got it to start. Next day started in the garage and let it run for 30 min, at this time it was starting fine first thing every day, noticed that the right rear tail light only had half of the leds working and that the brake lights were not working. Tested the battery while running and it was showing about 14.5v with 12.7 with engine off. Thought I noticed the instrument back lighting not working also. Took to Dave Strong Porsche here in Salt Lake. As soon as I got there I went to restart and same issue and was able to get the tech to come out and see the same. Later they told me the brake lights were working fine and it started the next morning but not in the pm. Tech hooked up the PIWIS when it wouldn't start and was showing "no comm" with the DME and no "15 power" (15sv code) like the DME wasn't even there. he thought it was the PAS module as he had disconnected it a few time and got the car to start, so he replaced the PAS (immobilizer) module and thought he had it fixed but it failed again. Tech was thinking it was the DME, talked to the guru at GIAC he he said it could be. I sent the DME to Champion Motorsport and they, working with GIAC, ran a bunch of tests on it including opening it up and looking at it under a microscope, it all worked fine, they also re flashed with new software to rule out a bug. DME reinstalled by the local tech and still fails randomly. Always key on "PSM" and "ABS" fail, key to start and "depress clutch" no start. Tech then unhooked and cleaned all the grounds, checked the relays, replaced the clutch "cruise disconnect" switch (he said he was getting weird resistance reading on it), swapped out the brake switch and ignition switch and still is able to get it to fail every 6 to 9 key cycles. He said he had disconnected some buss bar/mulit wire mount up under the drivers side and while manipulating it was able to get the car to fail or pass. He is thinking there is possibly a bad wire up there somewhere and is waiting for PCNA to get back with him so he can talk to one of their experts. My thoughts as of now. Something is telling the PAS that the clutch is not depressed and something seems to be telling the PAS there is no "15 power", ignition power, not sure where the PSM and ABS come into play. But this only happens randomly so sounds like a bad connection somewhere. I just wish I and the tech new what talks to what at key on and key to start. That is what he is hoping to get from PCNA.
  15. No. Just the engine performance kit from Champion Motorsport with a GIAC flash. It does have extra led driving lights up front and a full .2 rear bumper and lights with GT-2 wing. The car had no problems since 08 in Fla, then when it shows out here in Utah and 20 to 30 degrees F it starts having issues. Car was fully inspected, CPO inspection, by the dealer i bought it from with no issues. PCNA is not honoring the CPO and sending my money back, my local dealer, Dave Strong, whined about the extra parts on the car, they have a history of this.
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