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Porsche Driver
 
Join Date: Sep 2014
Posts: 49
Porsche 912E engine stopped running while driving - not firing on anymore now

Hi everybody,

I'm new here on the forum. I bought a great 912E end of last year and enjoyed some great driving already. Last week It was a beautiful day and had a spinn with the car and they it stopped running out of the sudden...

I tried to start again, and engine is turning but not firing up..like it ran out of fuel..

Car was towed back home and I already tried to eliminate all kind of causes.. i checked the fuel first as I found it strange it just stopped while it was running fine before. Fuel is getting to the end, dual relais works fine (openend it to check with connector on and they switch), fuel pump running ( check it by removing the hoses), check fuel coming to the engine which looks fine as well... Checks the spark on sparkplugs which seems fine... So must admit I start to wonder what could cause this sudden engine stop...as it is in good condition and nog signs upfront of any malfunction of a specific part. I can't believe it's something very serious as engine turning fine, but just not starting up..

I wonder if other 912E owners or 914 2.0 owners has a similar experience... i'm curious to learn what was the cause of the issue and how you fixed it.

Thanks in advance for any hints of what the issue might be

Old 09-29-2014, 11:33 AM
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Join Date: Jun 2006
Location: Southold, NY
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Sudden stop is probably electrical in nature. Check that all wires are properly attached. Pay particular attention to the small wires leading to and from the coil.
Old 10-01-2014, 08:01 AM
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Quote:
Originally Posted by ejboyd5 View Post
Sudden stop is probably electrical in nature. Check that all wires are properly attached. Pay particular attention to the small wires leading to and from the coil.
I had this same issue.

Replacing the coil with a Bosch Blue along with several of the wires leading into the coil seemed to have resolved the electrical issue.

The connections upon further inspection were frayed and only holding on by a few strands of wire.

I also replaced the connections on the battery while I was at it.

A battery cover is next on my list.

I know that bad feeling when power cuts out in the middle of a drive...

Good luck!
__________________
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'03 911 - Vision Motorsports

'70 911T Targa (sold)
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Old 10-01-2014, 09:24 AM
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Porsche Driver
 
Join Date: Sep 2014
Posts: 49
Thanks already for your hints!

I'm keen to check out the coil and wires connected over the weekend.

It's not great to be towed away..but hey, it's a great classic car and things like this can happen once a while. I see it as an opportunity to get to know the car better. So far it was very reliable.

I'll keep you posted. Thanks already for your hints!

Enjoy
Old 10-01-2014, 11:40 AM
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Porsche Driver
 
Join Date: Sep 2014
Posts: 49
Found a loose cable

I couldn't wait to further check the electrical system so I verified and cleaned lots of cable contacts but didn't find anything odd from looking from the top. Then had a look under the cars with a flashlight and found a loose cable on the alternator.

I noticed the cable broke of from the alternator (which had two red wires in one )

I asked my wife to start the car and I held the broken cable against it and the engine started again for short while so guess it will be fixed after reconnecting it again properly.

Tomorrow I will fix the broken cable so hope this will resolve my start problems. I read somewhere else that this cable is feeding the injector power...so no surprise it wouldn't fire up..
Old 10-03-2014, 11:46 AM
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Porsche Driver
 
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Picture of the loose cable on alternator

It looks like two cables were connected, one wide diameter cable and a smaller thinner one.

Sorry that it's pritty dark but you can still see it (I hope)

Old 10-03-2014, 12:01 PM
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Porsche Driver
 
Join Date: Sep 2014
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Help...

Hi,

I've fixed the broken cable this morning and I managed to fire is up but is was running very rough and only with higher revs. Normally the idle was perfect around 1000rpm but now it just stalled.

I tried to restart it a moment ago and it won't fire up again..

Could it be that the cable that broke of caused electrical damage to other components? Any other clues of what the issue could be and I find it very strange that a perfect running engine would just run poorly or even not starting due to a cable that got loose.

Engine is turning nicely but just refusing to really turn on..and i really look forward to hear the music from the engine again :-)

Thanks in advance for any hints or experiences.
Old 10-04-2014, 03:35 AM
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my real advise, as I do know the engine from the 914 . . bring it to the specialist . .There a so many things due to the jetronic and else which could fail or not or just the cable or . . the triggerpoints, or . .
The 914 specialist had it up and running in 15 minutes and the perfect set up with valve setting and ignition timing in three hours . . It was even worth to pay an extra bonus . .sorrowly I am in europe, so I canīt give you an adress .
Old 10-07-2014, 05:44 AM
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Porsche Driver
 
Join Date: Sep 2014
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The specialist is indeed the next option..

Getting the car picked up and delivered to a specialist is indeed one of the options that crossed my mind already.

I first have shortlist of items I want to look at myself, as I don't like to give up quickly and I like to do stuff myself (part of the fun next to driving which is number 1)

I let the car rest a little and tried to start this morning. The Engine did start up but died immediately.

My checklist is the following

- check once more if there are any loose or faulty electrical connections at the coil
- check the coil itself (by checking color of the spark)
- Check if fuel is reaching fuel injectors

If non of the above help me out I will for sure call in some expertise of a VW or Porsche 914 specialist as even though I like looking at the car, the driving is what I prefer ;-)
Old 10-07-2014, 06:02 AM
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Porsche Driver
 
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Got it running now..with help from my right foot..

To keep you posted,

I just checked the cables again..all looks fine, started up, this time with some help from my right foot on the gaspadel..and it fired up and I could keep it running at higher revs, it won't let me keep it on the normal idle as it stops.

Tried to restart again with help from the gaspadel and it starts again. The minimum revs I need to keep is ~1800 and then it won't stop. Must admit..it doesn't sound as very smooth running like it did before.

Considering it runs at higher revs fuels doesn't seem to be the issue ( at least that's my conclusion). Which component is normally ensuring correct idle level? The odd thing, I didn't change anything since the car forced me to the side of the road.. Could it be the airflowmeter?

Any experience with this issue?
Old 10-07-2014, 06:53 AM
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dear porsche driver-iits not about giving up easily-just a price vs usage -kosten nutzen rechnung -i learned much more in these three hours getting it properly explained than through hourly waisting my brain goin through everything possible-maybe its jsut the pressure box, just a hose that slipped off-i changed all the old textil covered old hoses, which where in the car since 1973 immediately, because they all tend to break and get side air-so the jetronci always might get wrong preasures ahead-i also recommemd to go to the 914 sectiom on pelican amd also on 914 world-same engine, same lame problems
Old 10-07-2014, 07:56 AM
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Porsche Driver
 
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It's running again like normal! nulla tenaci invia est via

All,

Thanks for your feedback. I just resolved the issue and my baby if firing up like normal, running perfectly on idle at 800rpm.

I couldn't resist to check the vacuum lines again and hoses... After getting my tall body deep in the engine bay I noticed one hose came of the black plastic housing of the air flow meter... Will include an image.

I pushed it it, tight it down...


And then a big smile after turning the key as it's running even better than before! I adjusted the richness on the air flow meter and the idle screw as well and it's running smooth and picking up perfect after sudden release form higher rps.

nulla tenaci invia est via

So no need for a specialist, my endurence was enough :-)
Old 10-07-2014, 09:46 AM
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perfect, congrats....and again small issues tend to have large outcome-hoses...!
Old 10-07-2014, 01:35 PM
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Congrats, that is always such a satisfying feeling to solve a car problem.

Old 10-07-2014, 07:36 PM
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