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nesty
Joined: 22 Jan 2008
Posts: 75
Location: Bushey, Hertfordshire
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 Posted: Tue Mar 18, 2008 3:35 am Post subject: Fuel sender failure |
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Just a quick query. Porsche fuel sender in the tank. I am getting a zero readingon gauge. I have tested the wires to the top of the sender and getting voltage as expected.
The sender had been taken out about 6months ago. Obvouilsy something gone wrong with sender. Can something stick in them, is the part serviceable or easier to get replacement?
Can drives ok, just have to keep a mental note of fuel at moment.
Nesty
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Porsche 924 2.0 Litre (1982 model),
Porsche 911, 3.2 Carrera |
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924RACR
Joined: 29 Jul 2001
Posts: 9112
Location: Royal Oak, MI, USA
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| Posted: Tue Mar 18, 2008 4:29 am Post subject: |
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You should be able to short the relevant wire to ground and get the gauge to read full IIRC - have you confirmed that?
There's some small possibility of cleaning the sender, if you're careful/gentle, but it's limited. I think I covered that in the Tech Section, probably under Electrical... but at least replacement's pretty easy!
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Vaughan Scott
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'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype |
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sparky
Joined: 27 Nov 2002
Posts: 772
Location: Malta
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| Posted: Tue Mar 18, 2008 12:34 pm Post subject: |
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| 924RACR wrote: | You should be able to short the relevant wire to ground and get the gauge to read full IIRC - have you confirmed that?
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+1 to that. If you touch one of the wires to earth, the guage should read full. If that works, it is the sender unit. Some crud can build up on the extremly thin wire that gives resistance. Causing the float to stick.
I managed to clean mine by opening it and spraying alot of WD40 onto it. I did not touch it by hand. It is very easy to stretch that tiny wire! Once it was all cleaned, I connected it and tilted it to make sure the guage read correctled as I moved it. Then put it back in the car. So far, so good 
SparkY
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When the checkered flag drops... The Bull$hit Stops
1976 Euro 924 (The 945)  - Full 951 Brakes/Suspension
1998 Boxster with goodies
2002 3.0 Xtype 4wd sport |
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Mike924
Joined: 12 Aug 2004
Posts: 2601
Location: IoW UK
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| Posted: Tue Mar 18, 2008 6:08 pm Post subject: |
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Be aware that here are two type of fuel sender: the early bayonet type and the later bolt-in type.
I have a fully-working example of both types that I can let you have for a nominal amount, should you decide to replace yours, but they're easy enough to get working.
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1985 Porsche 924 'Lux', Kalahari Beige (my ex)
1993 Porsche 968 Coupe, Midnight Blue, 6 spd
'There is no substitute for a little grease under your fingernails.' - Chrenan, 924board.org |
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