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Join Date: May 2002
Location: Santa Barbara, CA
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Quote:
Originally Posted by LARRY SHARP View Post
Some times multi errors can be traced to bad solder joints in the clock .. almost all systems run thru the clock ..
are you serious ...

While it is true that the clock hosts most of the warning lights it can not be the reason for a poor running engine cutting out. Nothing runs "through" the clock. There are lights that have one end connected to +12V and the other goes to the respective control units and/or the central informer. Even with the clock not installed the engine would run just fine. The only system that would be getting upset is the airbag control unit. It senses the missing indicator light and throws up a fault code that needs to be deleted by the PST-2 or similar or by disconnecting the battery.

Back to Jaggi's issues. I remember his previous post and then it sort of got taken over by another guy who subsequently traced his very similar issue down to a bad coil.

For me it still sounds like your DME and the other control units are resetting constantly and one of the reasons for that is electronic interference from the ignition system or poor GND. If you have replaced the plug wires try to run the engine with just one or the other ignitior connected. That way you can isolate a bad coil. Or get a replacement coil pack for test purposes and see if that solves your issue.

When you say Bosch service are you referring to an independent shop with a Bosch logo outside? Not that there is anything wrong with that - we have a couple in town. But I have seen them guessing at electrical and electronic problems before and it scared me. The fact that they don't have access to a loaner DME and suggest you buying one tells me you need to find someone more competent in your area.

Good luck,
Ingo
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1974 Targa 3.6, 2001 C4 (sold), 2019 GT3RS, 2000 ML430

I repair/rebuild Bosch CDI Boxes and Porsche Motronic DMEs
Porsche "Hammer" or Porsche PST2, PIWIS III - I can help!!
How about a NoBadDays DualChip for 964 or '95 993
Old 12-02-2008, 02:38 PM
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