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Hot!991.1 Engine turn over issue

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SimonDevlin
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2020/05/22 16:22:51 (permalink)

991.1 Engine turn over issue

Hello to you experts out there. I could use a little advice on an issue that my 991.1 Carrera has developed.
The issue is as follows:
Like everyone else, I havent been able to use my car due to the Covid situation, I've snuck out on several occasions just to give it a six mile leg stretch but that's about it. I start it every week to check status etc and usually keep it on trickle charge (but in this case, I forgot).
This week, I jumped in, preparing to reclaim my freedom but, no go, got the "battery low" warning message and the "start engine" message after that.
The starter engaged for a second but wouldn't turn over further. I immediately plugged in the trickle charger and left it for 24 hours.
The next time I tried the starter with a fully charged battery I got the same initial starter engagement for a split second but no further turn over. Even though the battery is testing good and showing 850 or so CCA, I tried jump starting from my wifes car. Same result. Ive tried this and also a booster spare battery but to no success.
I've spoken to Porsche Sheffield and they could only suggest to bring the car in as it's still under warranty. Obviously I can't do that and they have no transportation service at present.
My only option is to rejoin Porsche Assist for £264 and get them to pick it up but I thought it was worth asking you guys if any body has had a similar issue or may know of a resolution. I'm guessing that it is an ECU or a relay problem or perhaps linked to the immobliser but, I'm running dry on inspiration.
Apologies for the long post but hopefully someone can shed some light.
Many thanks,
Simon

17 Replies

Lancerlot
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Re: 991.1 Engine turn over issue 2020/05/23 09:49:57 (permalink)
Well if you're sure the battery is in top condition, then you need to check the components further down the line. 
I would start with the battery terminals, earthing straps, engine earthing, connections to the starter and the voltages between each section, fuses etc.
If all this fails to reveal the problem, have the vehicle recovered to your Porsche Centre for further investigation.
Regards,
 
Clive 

The older I get - the faster I was!
Past - 924T, '911 SC, 911 C, 911 C2, 964, 996, 996TT, 997TT, 997GT2, 430 Scuderia, 997TT, 997TTS, 991.2TTS. Current -Macan S.
SimonDevlin
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Re: 991.1 Engine turn over issue 2020/05/23 10:13:07 (permalink)
Thanks for your reply Clive.
I had planned to spend today checking some of those items you listed but you’ve given me some further options to check.
Can I just ask if there are any issues regarding removing the battery without having to have the vehicle reset or whether it needs to be kept powered via a backup supply? There is a lot of dis-information regarding this, especially from Porsche Centres.
 
Thanks again
Simon
Lancerlot
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Re: 991.1 Engine turn over issue 2020/05/23 10:52:00 (permalink)
Simon,
The vehicle is dead anyway so removal of the battery is unlikely to place you is any worse position!
But if you're worried, you have access to a second battery, so use this as a slave, although I fail to see what can be accomplished by removal of a perfectly good unit, unless you're worried about shorting it out, in which case just disconnect the earth terminal.
Regards,
 
Clive 

The older I get - the faster I was!
Past - 924T, '911 SC, 911 C, 911 C2, 964, 996, 996TT, 997TT, 997GT2, 430 Scuderia, 997TT, 997TTS, 991.2TTS. Current -Macan S.
kevinli4877
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Re: 991.1 Engine turn over issue 2020/05/23 11:15:30 (permalink)
Hi Simon,
 
Unfortunately, I experienced a very similar, if not the same, issue fairly recently.
 
I used a mobile charger...nothing! So I called my local garage and they used a commercial-grade mobile charger (which he said would even start horse boxes so will start anything)...nothing! So I had to call out my breakdown recovery and even they couldn’t start it!! So they had to recover it to my local Porsche centre, who fixed it in no time at all.
 
Basically, in certain situations some kind of anti-theft mechanism kicks in and only Porsche can restart the engine. A bit of a pain but in some respects nice to know.
 
Good luck
 
Kevin

Cheers
Kevin
991 C2S Cabriolet
SimonDevlin
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Re: 991.1 Engine turn over issue 2020/05/23 11:32:13 (permalink)
Yes Clive, you’ve hit the nail on the head re a dead car, I mean, what else could possibly go wrong? (I know the answer to that, lots 😃)

Once again, many thanks for your attention.
Simon
SimonDevlin
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Re: 991.1 Engine turn over issue 2020/05/23 11:47:40 (permalink)
Hey Kevin,
I’ve just seen your post and your past and my present situation do sound like they parallel somewhat.
I‘m glad you posted as it maybe saves me a lot of wasted time chasing something I might never find. As you state, it does ease my mind that the issue may not be a serious fault and that a quick visit to Sheffield Porsche should save the day. I was due to go for the 35000 mile intermediate service there next week but, just got to figure a way to get it there now.
 
Both Clive and you have been most helpful, it is appreciated, thank you.
 
Simon
Lancerlot
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Re: 991.1 Engine turn over issue 2020/05/23 12:12:06 (permalink)
I had eliminated any anti-theft defect because you reported the starter partially engaging, which is unlikely to happen if this were the case.
From the symptoms you described, the problem is electrical, but it's always difficult being categoric from description of a fault.
Regards,
 
Clive    

The older I get - the faster I was!
Past - 924T, '911 SC, 911 C, 911 C2, 964, 996, 996TT, 997TT, 997GT2, 430 Scuderia, 997TT, 997TTS, 991.2TTS. Current -Macan S.
SimonDevlin
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Re: 991.1 Engine turn over issue 2020/05/23 12:32:23 (permalink)
Again, a very good point Clive, the starter does momentarily engage.
I‘ll get the overalls back on 😬
 
Have a good day,
 
Simon
kevinli4877
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Re: 991.1 Engine turn over issue 2020/05/23 12:47:16 (permalink)
Hi Simon,
 
My car turned over slightly too but just wouldn‘t quite start.
 
 

Cheers
Kevin
991 C2S Cabriolet
SimonDevlin
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Re: 991.1 Engine turn over issue 2020/05/23 13:19:40 (permalink)
Hi again Kevin,
Well that sounds exactly the same then. Was it just a PIWIS plug in and reset procedure at Porsche Kevin?
I knew this was the right place to come 👍
 
Thanks again
 
Simon
Lancerlot
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Re: 991.1 Engine turn over issue 2020/05/23 13:22:36 (permalink)
From what you've described, my bet would be a duff battery. Trickle charging and 6 mile trips will not have maintained a full charge. In fact, unless you have a smart charger, prolonged trickle charging can actually damage your battery. You need to invest in a smart charger. (See https://www.porscheclubgb.com/forum/tm.aspx?m=982173#982173 )
 
I would start there first, unless you're 100% sure it's good. Connect up your good slave battery with jump leads, whilst disconnecting the earth terminal on the one in situ, thus eliminating it from the equation. If it starts, you know you will need to replace it. If so, make sure its a Porsche approved replacement if you have Porsche Extended Warranty.
 
Regards,
 
 

The older I get - the faster I was!
Past - 924T, '911 SC, 911 C, 911 C2, 964, 996, 996TT, 997TT, 997GT2, 430 Scuderia, 997TT, 997TTS, 991.2TTS. Current -Macan S.
kevinli4877
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Re: 991.1 Engine turn over issue 2020/05/23 13:34:42 (permalink)
Hi Simon,
 
I believe so, however to be honest I didn’t ask too many questions as just glad they go my car working again as it was out of action for a few days.

Cheers
Kevin
991 C2S Cabriolet
SimonDevlin
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Re: 991.1 Engine turn over issue 2020/05/23 14:02:38 (permalink)
That‘s a very good suggestion Clive re using the jump battery with the in-situ battery earth disconnected, I will give that a go next.
 
When I said trickle charge previously, I mean’t to say smart charger.
 
I’ve used a Sealey BT101 battery testing meter to check voltage and cranking power and as I said before, it seems to be reliable. I’ve been testing it out all week on various car, motorcycle and lawn mower batteries, some of which I’m sure are sound and some of which I know are past their best, I know, I’m a hoarder. It has come back with the results I expected each time but having said all that, I still feel the urge to try your jump suggestion.
I’ll report back on how it went, hopefully.
 
Best regards
 
Simon
 
 
 
 
 
SimonDevlin
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Re: 991.1 Engine turn over issue 2020/05/23 15:16:56 (permalink)
SUCCESS!!!
 
Okay, It’s going, YAY 😁 
I did as you suggested Clive, I connected my wife’s car to the 911 and tried to jump it one final time, no joy.
I then disconnected the earth from the 911 and the power stayed on using the other cars power, tried to start it again but this time it showed all the symptoms of a flat battery ie, lights flickering and dash flashing etc but still no start.
I detached the 911 from the other car and then disconnected the 911 battery completely so the whole system was dead, my logic being that I’d come this far so I might as well start from scratch in case of a system reset procedure.
I reconnected the 911 battery and low and behold, it burst into life.
I guess that maybe a system protection had tripped when my battery was at a low ebb and needed to be reset, possibly this is all Porsche did to your 911 Kevin.
 
Anyway, I thank both you Clive and you Kevin for your assistance and insight, I’m on a high now and you are both heroes in my book 👍
 
Many thanks and enjoy the bank holiday, as if we need more time off....
 
Simon
Lancerlot
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Re: 991.1 Engine turn over issue 2020/05/23 16:37:54 (permalink)
Congratulations, delighted you got it sorted. Persistence often overcomes resistance! 
Regards,
 
Clive

The older I get - the faster I was!
Past - 924T, '911 SC, 911 C, 911 C2, 964, 996, 996TT, 997TT, 997GT2, 430 Scuderia, 997TT, 997TTS, 991.2TTS. Current -Macan S.
SimonDevlin
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Re: 991.1 Engine turn over issue 2020/05/23 16:56:53 (permalink)
Persistence often overcomes resistance! I like that 👍
 
Thanks Clive
 
Simon
kevinli4877
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Re: 991.1 Engine turn over issue 2020/05/23 22:45:42 (permalink)
Hi Simon,
 
Glad it all worked out well!
 
Take care and happy driving.

Cheers
Kevin
991 C2S Cabriolet
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