[vineyardcowboy]

Just started happening. Either takes many tries to start, then when running perfectly it will die and shut off after letting off throttle or coasting. I have a great mechanic and he can't figure it out either. Help!

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[tejon007]

Good luck, that's a very difficult problem without much to go on. Have you swapped the DME with a known good one??

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[ds968]

 Have you swapped the DME with a known good one??

 

  + 1 

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[Bruckner]

Just started happening. Either takes many tries to start, then when running perfectly it will die and shut off after letting off throttle or coasting. I have a great mechanic and he can't figure it out either. Help!

 

Did you perform a fuel pressure test?

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[vineyardcowboy]

Okay this is embarrassing. What's a DME? 

 

I'll ask my mechanic if he tested fuel pressure, 

 

Thanks Guys!

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[Waylander]

The DME relay is a relay that supplies power to the fuel pump when the engine is running



These are a known failure point, I always have a spare in the car

Replacement is a 2 min job

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[dlearl476]

This reminds me: I need to stop procrastinating and get a spare. 

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[vineyardcowboy]

So the issue is it's receiving fuel fine but no spark. Any ideas on cause? Thanks

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[vineyardcowboy]

Has fuel but no spark is the issue. Any ideas? 

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[tejon007]

It could be so many many things from the ignition switch, wiring harness, coil, distributor, etc.



Wild guess: ignition control module?



Did you get a spare DME relay yet?



Best wishes for a successful fix!

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[unknown4u]

Check te motronic faultcodes. Perhaps the pickup from the crankcase is worn.

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[tejon007]

+1



Ask your mechanic if he/she used a scanner and what codes did she find had been set?

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[Waylander]

At an educated guess it will be the crankshaft position sensor or its connection.

It could also be the ECU they suffer from dry joints

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[vineyardcowboy]

It's got a bad coil is the problem. Except we can't find one to purchase. Does anyone know where to get a new or used coil? Thanks

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[Waylander]

Porsche have them in stock

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[dlearl476]

This reminds me: I need to stop procrastinating and get a spare. 

Got my spare from Tech9 yesterday. Great service! 

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[dlearl476]

It's got a bad coil is the problem. Except we can't find one to purchase. Does anyone know where to get a new or used coil? Thanks

Stoddards is the only place I found them available.* (They’re listed on their website, not guarantee they have any in stock) $279. 

 

*That’s just great. After tensioners being NLA for 2-3 years, now nobody has coils. If I can find any specs, I’ll post them. Shouldn’t be too difficult to find a replacement. 

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[vineyardcowboy]

Well I thought is was the coil. It's not. Problem still exists. 

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[tejon007]

Not criticizing you here, but can you have another mechanic look at it?



One can easily test a coil with a multimeter. Your problem could be so many things (ICM, crank sensor, wiring, etc.), so you need someone with the skills to troubleshoot it. Just 2 cents worth, & probably worth less than that.

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[Waylander]

So when you go to start and cranking does the tacho needle bounce?

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