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Hot!Engine Cranks But Wont Start

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Motorhead
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Re: Engine Cranks But Wont Start 2021/04/03 13:28:00 (permalink)
Nick,
 
I suspect that it (and the DME module itself?) will be located somewhere on the engine side of the rear bulkhead, but can’t confirm.
 
If you want to search through the (rather lengthy) PET for your 987.1 to get some ideas you can download it from here:
 
https://www.porsche.com/uk/accessoriesandservice/classic/genuineparts/originalpartscatalogue/
 
The DME controls the ignition and fuelling and since the fuse that keeps blowing is associated with both then clearly there’s a problem in that part of the circuitry, but without detailed diagnostics it’s impossible to say what’s actually causing it.
 
All very frustrating for you … but full marks for sticking with it!

Jeff
 

987.2 Cayman S
North Beds (R10 & R24)
Nick7602
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Re: Engine Cranks But Wont Start 2021/04/03 13:51:32 (permalink)
Hi Jeff
 
Its a process of elimination, my thinking is if I can help the techie by ruling out certain parts, like the DME relay he can crack on checking things like coil packs etc, and injector connections.
 
I don't like giving up as thats to easy, prefer to learn and understand the car then place my experience on the Forum to help others hopefully, its all a learning curve albeit an expensive one
 
 
Kind Regards
 
Nick
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Re: Engine Cranks But Wont Start 2021/04/03 14:30:15 (permalink)
I know where you’re coming from Nick … I’m the same! 
 
I’m not sure if it helps but here’s a link which shows what you’re looking for, though I’m not sure where it’s located:
 
https://www.design911.co.uk/fu/prod12484/DME-Relay-Porsche-Boxster---Cayman---997/

Jeff

987.2 Cayman S
North Beds (R10 & R24)
Motorhead
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Re: Engine Cranks But Wont Start 2021/04/03 14:52:04 (permalink)
Nick,
 
Looking at the PET for your car the DME is shown as item 1 in Illustration: 901-003 and the DME relay as item 7 in Illustration: 902-000 (part no. 999 657 013 90) with relay location/code no. S11, whatever that means! Maybe you can have a look around to see if you can recognise some of the plastic support structure?
 
Happy hunting!
 
Jeff

987.2 Cayman S
North Beds (R10 & R24)
doktorbone
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Re: Engine Cranks But Wont Start 2021/04/03 18:25:53 (permalink)
You have got me wondering where the relay is in my car now
Found this and now I know ..
 
https://howtoporsche.com/cayman/987c-2005-2013/2005-to-2013-cayman-987c-fuses-box-diagram-location-amperages-list/
 
Hope all goes well getting yours sorted Nick.
Cheers - Tony

Cayman 987.2
Nick7602
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Re: Engine Cranks But Wont Start 2021/04/03 20:46:30 (permalink)
Hi Tony
 
Thank you for your kind, thought, Jeff very kindly showed me the fuse diagram earlier in the thread
 
Thanks you for your kind thought though Tony
 
 
Nick
 
post edited by Nick7602 - 2021/04/03 20:56:28
Nick7602
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Re: Engine Cranks But Wont Start 2021/04/03 20:55:13 (permalink)
Motorhead
Nick,
 
Looking at the PET for your car the DME is shown as item 1 in Illustration: 901-003 and the DME relay as item 7 in Illustration: 902-000 (part no. 999 657 013 90) with relay location/code no. S11, whatever that means! Maybe you can have a look around to see if you can recognise some of the plastic support structure?
 
Happy hunting!
 
Jeff




Thank You Jeff
 
You and the guys have been very helpful, with your help I now know where the relay lies under the steering column to the right,
 
Great now I can crack on and install, the relay once I get it
 
 
 
Thank you lads for all you kind support
 
 
 
Nick
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Re: Engine Cranks But Wont Start 2021/04/07 11:25:24 (permalink)
Well we have now found the problem
 
Coil Pack 2 has literally melted on to the wiring loom plug, the looms plug has got to be cut off and replaced, my techie chap is in the process of changing all the coil packs and wiring loom plug
Motorhead
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Re: Engine Cranks But Wont Start 2021/04/07 12:28:10 (permalink)
Wow! A mega-short there Nick. Hopefully your tech will sort it and get you back on the road again. 👍
 
Jeff

987.2 Cayman S
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Re: Engine Cranks But Wont Start 2021/04/07 12:36:10 (permalink)
Hi Jeff,
This is what happens when people skip on parts at service time
I know the previous owners haven't been that diligent, skipping on replacing stuff, thank fully Im not like that, I will post some pics of the parts when I see the Tech
 
These coil packs are a problem to alot of car companies, im surprised no one has made a better quality version.
 
 
 
Nick
post edited by Nick7602 - 2021/04/07 12:43:04
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Re: Engine Cranks But Wont Start 2021/04/07 12:44:00 (permalink)
Great news on a quick diagnosis Nick - that is a proper short!
Hope you can get it resolved with a minimum of hassle, with a full set of new coil packs you should be good to go.
Would be very interested to see pics of the carnage.
Cheers - Tony

Cayman 987.2
Motorhead
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Re: Engine Cranks But Wont Start 2021/04/07 12:52:18 (permalink)
You’re right Nick. Now that the older cars are more affordable they can fall into unsympathetic hands, with owners either unable or unwilling to spend money on correct servicing and maintenance. Thankfully that’s not the case with yours and it sounds as though you’re committed to sorting out previous neglect … full marks for that!
 
Jeff 

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Nick7602
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Re: Engine Cranks But Wont Start 2021/04/07 13:09:53 (permalink)
Hi Guys
 
I certainly hope so Tony
 
I think Jeff that if you decide to buy a Porsche you buy it for one of two reasons, 1, Its ok I will thrash the living daylights out of it and junk it when its starts to cost, because it was only cheap after all.
 
2, You love the Marque, and are committed to replacing worn broken and badly maintained parts, for the love of the car and the Marque.
 
I have to say 2 is where Iam, I decided long ago not to give up, there have been times I have torn my hair out trying to understand the mentality of why previous owners haven't looked after the car correctly, however with the brilliant help of a well recognised Porsche Specialist, I am in the process of replacing a shed load of chassis components, even the Specialist is amazed at the level of replacement Im undertaking.......I just love Porsches 
Nick7602
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Re: Engine Cranks But Wont Start 2021/04/08 18:07:42 (permalink)
Hi Guys
 
Here is pics of the carnage, 
 
So: symptoms were 1, smell of burning a few weeks ago I dismissed this to a bit of over velous driving on my part. 2, Car idling on the drive for about 30 mins a sudden rise in revs slightly for a brief moment. 3, Car pulled of the drive car coughed and buffeted then completely cut out. 4, Car would crank but no start. 
 
Result: Melted coil pack see pics, this need to be cut off the plug, and a new plug fitted to the wiring loom.
 
There is a lesson here I think, if something needs to be changed at service time such as coil packs and plugs then do it, the manufacturer has worked out the correct interval time for various components to be replaced, Porsche will have worked out how many hours it takes for these coil packs to fail, and then worked on the side of caution and built a safety margin in, so when they need replacing replace them, the poor previous owners lack of mechanical sympathy and care has led to this failure in my opinion.
 
 
 
 
   
 
 
 
post edited by Nick7602 - 2021/04/08 18:57:03
doktorbone
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Re: Engine Cranks But Wont Start 2021/04/08 19:27:13 (permalink)
That looks nasty, could have been a lot worse - think you had a lucky escape there Nick
Even with full service histories, we never really know if things have been replaced when they should have been by previous owners.
I'm with you 100% on adopting a "preventative" outlook regarding replacements/maintenance on our cars, gives you a good feeling knowing that with a bit of luck there should be no surprises (I am touching wood while saying that!)
Hope you are trouble free from now on.
Cheers - Tony

Cayman 987.2
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Re: Engine Cranks But Wont Start 2021/04/08 20:23:24 (permalink)
Hi Tony
 
Im sure there will be other surprises, at least I now know all the coil packs have been replaced, and to be honest the car drives a lot better, so im quite pleased, yes I think I was quite lucky, I hope my experience helps others within the club
 
 
Kindest Regards to all that read my thread
 
 
 
Nick
 
 
 
 
 
Boxstercol
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Re: Engine Cranks But Wont Start 2021/04/08 22:20:44 (permalink)
Wow! Scary stuff, could have been a lot worse...
Glad you got it sorted.
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