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Registered
Join Date: Jan 2006
Location: Winchester, Virginia
Posts: 30
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Fuel Pump Fuse
How hot should the fuel pump fuse get on a 930 Turbo, I cleaned all the contacts, wires and put Dialectric grease on all surfaces. Was fine for a while now is getting warm again to the touch. What should the current draw be at the fuse? Don't know if it is normally warm at the fuse or not. My car is a 1987 930 Turbo with 48,000 miles, I am also having the hot restart issue. I am going to replace check valve and accumulator this weekend. Did not want to spend 301.00 for a front fuel pump if it is not needed.
Thanks for any help |
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03-14-2006, 11:19 AM
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Join Date: Aug 2001
Location: Brighton UK since 11/2012
Posts: 3,170
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There are two fuel pumps, current draw from either one shouldn't be over 8 amps. If the fuse is getting hot, there is a good chance the current draw is too high.
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From November 2012; Precision Porsche Specialist Sussex UK, +44 (0)1825-721-205 2001-2012 Gerber Motorsport Inc. 206-352-6911 07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red 08.16.09 1999 Kawasaki ZRX1100. Green. |
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03-14-2006, 11:21 AM
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Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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You need to read this -->
http://www.pelicanparts.com/techarticles/rice_ramblings/rice_ramblings-2.htm - Wil
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Wil Ferch 85 Carrera ( gone, but not forgotten ) |
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03-14-2006, 12:01 PM
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Cigars and 911's -- Smile
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This board is incredibly valuable.
I had no idea the old fuse boxes were that suseptible to heat and eventual overload. Probably why I've blown 2 red pump relays already on my 78SC - euro. (sigh) I can't image a replacement is cheap....
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[GruppeB # 978] 1978 911 SC ROW (Pure Euro, no DOT or EPA work done..) 1991 Toyota MR2 Turbo (3S-GTE 4Banger Rocket) 2001 Audi - A6 Quattro 4.2L-V8 (love the growl) 2014 Honda Odyssey for the soccer-team/accessories |
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03-14-2006, 12:09 PM
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Join Date: Dec 2004
Posts: 770
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I did the Rice modification that Wil is refering to last year on my '88. It works well. Both fuel pump relays and wiring near the fuses stay cool.
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03-14-2006, 01:21 PM
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Registered
Join Date: Jan 2006
Location: Winchester, Virginia
Posts: 30
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OSI,
You were having the same issues with a hot fuse. Did you determine it wasn't the fuel pump?, How loud are these pumps supposed to be? |
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03-14-2006, 02:01 PM
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Join Date: Jan 2006
Location: Winchester, Virginia
Posts: 30
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By the way, I am currently running a 16amp fuse on the pumps right now, I believe that is what is called for.
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03-14-2006, 02:04 PM
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Join Date: Dec 2004
Posts: 770
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My fuel pumps are the originals as far as I know and I really don't hear them running as they come on as the engine cranks and starts. I never really noticed my fuel pump fuse was hot as much as my fuel pump relays were hot and the wire to the fuse looked like it has been hot where it attached to the fuse block. I now have two fuses, one for each pump. The Lee rice modification was created to address the problem I think you are having and I had. If you do a search, you will see many examples of this. I sent you a p.m.
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03-14-2006, 04:07 PM
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Registered
Join Date: Jan 2006
Location: Winchester, Virginia
Posts: 30
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Thanks,
I will try the separate fuses first, this will probably solve the issue. I hate to spend 301.00 for a front pump if I don't need it. |
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03-14-2006, 04:18 PM
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1978 Porsche 911SC 3.0
