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Jay T
Barcelona


Joined: 21 Apr 2004
Posts: 1334
Location: Out West


PostPosted: Wed Mar 15, 2006 11:15 am    Post subject: Reply with quote

If I make a short journey (a mile or so) and park up, I seem to have occational problems re-starting the engine if I return within 10 minutes or so. It always fires up after about 4 attempts (and a few deep breaths) though.

Other than that, it runs just fine, and always starts from cold.

Anyone else experiencing this with their early 996s?

Thanks, Jay




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Parts
Dijon


Joined: 10 Nov 2005
Posts: 7590



PostPosted: Wed Mar 15, 2006 11:38 am    Post subject: Reply with quote

No problems like this with mine (although its a 2001). When you say problems re-starting is the car turning over or is it like the immoboliser is engaged ie nothing happens at all?

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Jay T
Barcelona


Joined: 21 Apr 2004
Posts: 1334
Location: Out West


PostPosted: Wed Mar 15, 2006 11:46 am    Post subject: Reply with quote

Thanks for the reply Chris. No immoboliser problems, the engine turns over, but initially fails to start.


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Alex Ess
Montreal


Joined: 05 Jan 2006
Posts: 606
Location: Zummerzet GB & St.Pete Fla.

1987 Porsche 911 3.2 Carrera

PostPosted: Wed Mar 15, 2006 12:26 pm    Post subject: Reply with quote

Ummm - sounds like you need to do a straight swap for an '87 cabriolet - fortunately I know a chap who has one....

but seriously - sounds like the engine management systems are being fooled by the just-off-cold engine - what's the mileage ?


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Jay T
Barcelona


Joined: 21 Apr 2004
Posts: 1334
Location: Out West


PostPosted: Wed Mar 15, 2006 12:59 pm    Post subject: Reply with quote

You know, if I were allowed 2 911s (its been made perfectly clear that I'm not!), I would also have a late 3.2. The iconic 911 shape.

Current mileage is around 32K.


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Alex Ess
Montreal


Joined: 05 Jan 2006
Posts: 606
Location: Zummerzet GB & St.Pete Fla.

1987 Porsche 911 3.2 Carrera

PostPosted: Wed Mar 15, 2006 1:57 pm    Post subject: Reply with quote

Hope you get it sorted - that kind of intermittent stuff can drive you nuts...

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TyUk
Silverstone


Joined: 20 Sep 2004
Posts: 116
Location: London


PostPosted: Wed Mar 15, 2006 1:59 pm    Post subject: Reply with quote

A friend of mine used to have a similar problem with a Lotus Esprit V8. It was new at the time and everytime he turned it off he would have to wait to restart it. I once pulled up on a yellow line, turned the car off, it wouldn't restart. It was clear that it wouldn't start with the engine just turning over and a traffic warden wrote me out a ticket while i was trying to start it and on the phone to Lotus!! Evil or Very Mad

I think it was something to do with the ECU and they had to replace it.

I got out of the ticket Very Happy


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Jay T
Barcelona


Joined: 21 Apr 2004
Posts: 1334
Location: Out West


PostPosted: Wed Mar 15, 2006 3:23 pm    Post subject: Reply with quote

Sod it. I'm late picking up the kids. Damn this forum. Gonna have to use the car. Short journey coming up ...

Wish me luck!


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Robertb
Dijon


Joined: 01 Sep 2003
Posts: 7111
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Wed Mar 15, 2006 3:49 pm    Post subject: Reply with quote

Sounds like 'monday morning syndrome' to me.... so called cos cars that were started up, driven out of the garage then washed and put back in on Sunday didn't start on monday.

Manifests itself on cars that are driven a v short distance from cold, then switched off.

Basically, the lambda sensors in the exhaust (?) cause the engine to overfuel on start up the second time, so it floods...

To avoid it, make sure there is a reasonable temp showing on the temp gauge before switching off.


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Alex Ess
Montreal


Joined: 05 Jan 2006
Posts: 606
Location: Zummerzet GB & St.Pete Fla.

1987 Porsche 911 3.2 Carrera

PostPosted: Wed Mar 15, 2006 4:52 pm    Post subject: Reply with quote

RobertB - am I also right in thinking that in this situation, holding the revs at say, 2-3000 for a second or two and turning off the engine whilst still revving, purges the cylinders ?

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Jay T
Barcelona


Joined: 21 Apr 2004
Posts: 1334
Location: Out West


PostPosted: Wed Mar 15, 2006 5:33 pm    Post subject: Reply with quote

That makes sense. Thanks Robert.

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Bud Fox
Montreal


Joined: 15 Mar 2006
Posts: 531
Location: London

1998 Porsche 996 Carrera 2

PostPosted: Thu Mar 16, 2006 2:27 pm    Post subject: Reply with quote

Mine (1998 C2) does exactly the same thing. Although I've no idea what it is, it doesn't seem to cause a problem. I think it has something to do with the engine management as the oil time is always at 8 or 9 minutes when the issue occurs.
I am due to get the car serviced in the next two weeks so I'll ask the guys what they think and let you know.

Matt

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Jay T
Barcelona


Joined: 21 Apr 2004
Posts: 1334
Location: Out West


PostPosted: Sat Mar 18, 2006 8:39 am    Post subject: Reply with quote

Thanks Matt.

As you say it doesn't seem to be a major problem. Though it does worry me that one day I'll have to be towed away from outside my kid's school Embarassed

Let us know how you get on.


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Robertb
Dijon


Joined: 01 Sep 2003
Posts: 7111
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Wed Mar 22, 2006 12:30 pm    Post subject: Reply with quote

Previous poster wrote:
Quote: Originally posted by Alex Skinner on 15 March 2006

RobertB - am I also right in thinking that in this situation, holding the revs at say, 2-3000 for a second or two and turning off the engine whilst still revving, purges the cylinders ?


Don't know... I try to make sure there is some meaningful heat showing on the temp gauge before switching off.

The RAC man who came round to start my XK8 one morning a while ago that had this prob did the following; removed fuel injection fuse then asked me to crank the engine for a few secs until you could hear it trying to fire. This was to avoid unburnt fuel getting in the cats and damaging them.

Then he put the fuse back in, and asked me to crank the engine with the accelerator flat out- after a little while the engine will start to fire, and of course you have to be careful to take some of the throttle off when the engine fires if you don't like revving cold engines... but don't let it stall or you're back to square one.


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steve cutler
Newbie


Joined: 30 Jan 2006
Posts: 19
Location: Basingstoke


PostPosted: Thu Mar 23, 2006 8:47 am    Post subject: Reply with quote



Had exactly the same problem with mine as well, 8 or 9 minutes on the oil gauge, engine turning over fine, just not starting....I think its deffo to do with a short journey...this happened when I drove to the pub at lunch, about a 3 minute drive, came out after lunch, wouldn't start....waited 10 mins and it started fine...I vote for engine management logic gremlins....

Steve


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Jay T
Barcelona


Joined: 21 Apr 2004
Posts: 1334
Location: Out West


PostPosted: Thu Mar 23, 2006 8:53 am    Post subject: Reply with quote

Taking Robert and Alex's advice, it appears that keeping the engine running for a little while and revving before switching off does the trick on short journeys. Certainly hasn't happened to me again since I have been doing this.

Thanks Guys.


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