[Bill968]

Our 1993 Tip Coupe has started dieing randomly with no warning signals - this really got our attention when it happend to my wife recently while turning left across oncoming traffic. <img src="/forum/images/smilies/968/ohmy.gif" class="smilie" alt="" /> When this happens it will sometimes restart quickly, other times it will act like the battery is low (it's new). When it acts like the battery is low it will then spin right up after sitting 5 minutes or so. Our well respected Porsche specialist could not replicate the problem meaning we are left with the process of elimination. The first thing we replaced is the DME (got it back yesterday). Next will be the fuel relay then the crank sensor. Has anyone else had similar experiences? This seems similar - but not identical - to problems some of the rest of you have posted on this forum. Thanks for the input.

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[PorscheDude]

Start with the DME relay (fuel pump).

You probably should have done that before replacing the DME.



Hope it works out and is something simple.

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[94SilverCab]

I hope that you have replaced the very cheap and often faulty DME Relay ($27) as opposed to the extremely expensive and not typically a problem DME Computer (Under the passenger side floorboard) ($1,500 +/-).



THere are a host of other possibilities, try the DME Relay first and report back (Be sure to purchase the 993 updated relay, sorry don't have the number at my fingertips).



Welcome,



Jay

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[Bill968]

thanks guys. Based on the price Jay quoted it was the DME relay that was replaced. We did the computer a couple of years ago (just died driving down the interstate one day). I will keep you posted.

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[94SilverCab]

Where are you located, perhaps could reccomend an expert to look at your problem...



Could be, fuel filter, hall sender, and on and on...



Do a search on Fault codes, and let us know the results...



Regards,



Jay

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[flash]

i have seen the socket for the relay be dirty enough that a new relay did not resolve the problem - i would make sure that you clean the contacts of the socket before concluding that the relay swap did not resolve the problem



check the main ground connection - a known failure point that will prevent full current - loose enough and it will kill the engine



also, check the main battery terminals



then the wires going to the coil - a loose connection there will interrupt the ignition signal

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[unknown4u]

Mine had the same. starting up after 5 minutes or so.

It was the electrical connector to the fuelpump. the connector was located 30 centimer from the pump.

The connector got hot, then there was no connection, car dies and when the connector cool down it fired up again and it worked for 1 or 2 or 3 minutes again.



Trying to replicate it is very easy to move the cable just beside the fuelpump, no demontage is needed.

It is at the side of the differentialhouse from the gearbox.



I do have a tip aswell.

.





See also this topic: http://www.968forums.com/index.php?showtopic=5534



maybe it will help you out before buying lots of parts.

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