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doc-matt
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Joined: 04 Jul 2019
Posts: 4
Location: Northumberland


PostPosted: Sun Aug 11, 2019 4:07 pm    Post subject: Fuel problems-help any ideas Reply with quote

I have a 2005 997.1 which I have had for 7 years. The fuel gauge used to be accurate and I could rely on it to put more fuel in if I got down to the reserve tank when the warning light came on. I did not do this as a matter of routine though, as I usually filled up before the light came on. I know the gauges are not that accurate due to the shape of the fuel tank. I use Shell super all the time.
Last year I had a holiday in Spain and used 98RON fuel most of the time except when not available, and on the way back the engine cut out with the gauge reading a quarter of a tank. AA called and no fault codes noted. I wondered about dodgy fuel and so we put in 5L of fuel. The engine burst into life and I filled up and no further problems.
This, however, has happened again twice. Fuel down to 1/4 of a tank and the engine cuts out, put in 5L of fuel and it starts again. I have measured how much fuel I have put in in these instances and I can only get 48L in the tank which is supposed to be a 64L tank, which suggests the tank is still 1/4 full. My local Indie has had a good look at the tank and the fuel take off and it looks fine. I do get a whoosh when I release the fuel cap. It has reduced the range of the tank significantly and leaves me needing to fill up sooner than I expect to. The remaining miles in the tank suggests about 90 miles on each occasion.
Does anyone have any ideas as to the cause, or suggest a solution? Thanks in advance....
 
  
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T8
General
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Joined: 29 Jun 2010
Posts: 15777
Location: Kent


PostPosted: Sun Aug 11, 2019 4:22 pm    Post subject: Reply with quote

I wonder if you've got an imploded fuel tank. Dont know

Have a speed-read of this thread. A similar thing happened to one of our regulars in his 996.

Click and read --> http://911uk.com/viewtopic.php?t=129613&start=80&postdays=0&postorder=asc&highlight=fuel+tank

ps. Welcome to 911uk
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2007 Guards Red 997 Turbo Tiptronic
ex 2004 Polar Silver 996T Tiptronic
ex 2002 Seal Grey 996.2 C4 Tiptronic
ex 1978 Silver 924 Manual
 
  
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doc-matt
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Joined: 04 Jul 2019
Posts: 4
Location: Northumberland


PostPosted: Sun Aug 11, 2019 5:37 pm    Post subject: Reply with quote

Thanks T8. Interesting read. I will ask my Indie if he noticed any change in the tank. Cheers
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6992
Location: Brighton


PostPosted: Sun Aug 11, 2019 6:32 pm    Post subject: Reply with quote

Imho .. if you had a collapsed tank then you would know about it by now , i've never seen it on a 997 .. doesn't mean it can't happen but pretty rare if it is this .

Your indy has also looked inside the tank .. he would have seen a problem like this .

My feeling is the fuel sender unit has hooked up on the fuel pipes inside the tank .

Its a metal bar with a float on it .. there are many pipes and if it ends up on top of one it will stop reading anything less than 1/4 as it can't go any lower .

Considering its always at 1/4 of a tank then it kinda points to this being the fault .

It is normal to get air escaping from the tank on removal of the cap .. it's just how much .. it still sounds to me like a stuck lvl sender on a pipe .
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doc-matt
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Joined: 04 Jul 2019
Posts: 4
Location: Northumberland


PostPosted: Sun Aug 11, 2019 8:19 pm    Post subject: Reply with quote

Thanks deMort. I will ask my Indy about this. I thought he would have spotted that when he looked in the tank?
 
  
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deMort
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Joined: 21 Mar 2015
Posts: 6992
Location: Brighton


PostPosted: Mon Aug 12, 2019 6:51 pm    Post subject: Reply with quote

Exactly what i thought Dont know

I'm just answering based on what i think though and what seems to fit with this problem ..

Nothing to say i'm not totally wrong but its all i can think of for this fault .

Far easier when i have the car to diagnose it you know Very Happy
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doc-matt
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Posts: 4
Location: Northumberland


PostPosted: Mon Aug 12, 2019 7:30 pm    Post subject: Reply with quote

I'm sure. It's a bit of a long drive down from the north east to Brighton though! Very Happy
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6992
Location: Brighton


PostPosted: Mon Aug 12, 2019 7:45 pm    Post subject: Reply with quote

doc-matt wrote:
I'm sure. It's a bit of a long drive down from the north east to Brighton though! Very Happy



Floor

Your not wrong !

i'm sure your Indy will sort it .. i just give what advice i can and am in no way different from him i expect .
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