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jay71's Avatar
 
Join Date: Nov 2005
Location: Evergreen, CO
Posts: 170
Hot Fuel Pump Relay

I was replacing a fuse in the front fusebox on my '86 930 today and I noticed that the fuel pump relay (the one closest to the cockpit) was pretty hot. I had just pulled into the garage after a drive that lasted about an hour. I haven't checked the fusebox before after running the car so I'm wondering if this is normal- or if I should be concerned. Other than the hot relay there aren't any issues with starting and the car runs great. If this isn't normal does it mean I've got a fuel pump that's ready to sh## the bed?
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Jay
'86 930
'60 Land Rover Series II SWB
Old 07-16-2008, 08:05 PM
  Pelican Parts Technical Article Directory    Reply With Quote #1 (permalink)
sudo apt-get purge 930
 
equality72521's Avatar
 
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,841
Shouldn't be hot, maybe slightly warm. Check all connections first. Makes sure everything is tight and clean. Bad connection=high resistance. High resistance=increased heat. Make sure all grounds are good and clean too. If all that is good then I would focus on a pump that may be pulling high current.
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Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL***

"Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing"
--clutch-monkey
Old 07-16-2008, 08:09 PM
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Join Date: May 2008
Location: Columbus, OH
Posts: 71
Check connections for carboning up.

I've had blown fuel pump fuses in the past and found carbon build-up on the connections (including the relays) on my 78 and 79. These were the old style pre-spade type fuses btw. I sand off the carbon from the brass connections. I then carefully and slightly bend back the tangs holding the fuses; and take a thin exacto blade to carefully and slightly open up the pins on the relays. This has gotten me home more than once. I haven't had to use my spares yet. You want to save those towing trips for a real break down.

cheers,

mark
Old 07-19-2008, 08:12 PM
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Location: UK
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Some one has said there is a chemical you can apply that helps too. Do a search, I forget what it's called.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 07-20-2008, 09:54 AM
  Pelican Parts Technical Article Directory    Reply With Quote #4 (permalink)
sudo apt-get purge 930
 
equality72521's Avatar
 
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,841
Stabilant is good for maintaining conductivity. http://www.stabilant.com/
__________________
Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL***

"Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing"
--clutch-monkey
Old 07-20-2008, 10:01 AM
  Pelican Parts Technical Article Directory    Reply With Quote #5 (permalink)
A fellow Pelacanite
 
NathanUK's Avatar
 
Join Date: Nov 2006
Location: UK
Posts: 2,002
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That's good stuff. But wasn't there a chemical that removes non conductive particles from conductive materials?
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 07-21-2008, 10:51 AM
  Pelican Parts Technical Article Directory    Reply With Quote #6 (permalink)
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