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Circuit Breaker in place of Fuel pump fuse?
My SC Turbo has only one fuel pump replaced with an 044 of questionable background. The pump has worked fine for a while until yesterday when it blew the fuse just as the ignition was turned on and then melted the replacement a few minutes later. I have researched the fuel pump wiring threads and will spend some time cleaning up my wiring. I was wondering if anyone has tried a circuit breaker on a 911/930? Tell me what you think. I know some aftermarket fuel pumps come with a 30amp circuit breaker with their wiring kits. I know I will need to replace my pump in the long run. Thanks in advance!
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Steve 1981 SC Steel Widebody Outlaw in Pacific Blue and Artic White, 930/51 to 3.2l, K27 7006 Turbo, P&P Twin Plug heads, Twinfire Ignition, BLwur, Ruf Intercooler, Powerhaus headers, Zork, CIS Euro FD, 009 injectors, DOD, DP Lid, 044 pump, 930 4 sp LSD, Mocal 44 w/fan, LM2, Brembo, Retroair, Euromeisters. |
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Steve, as I'm sure you know, the fuse is there to protect the wire not the pump. If it's blowing, you need to figure out why. You're on the right track researching the fuel pump wiring fixes.
It's sort of a timely post. I experienced a meltdown yesterday of my interior lighting circuit. I now have to go spelunking in the dashboard and figure out what caused it and what else in the harnesses that run alongside those wires might have melted. I just talked with Dennis (Timmy2 here) - super helpful guy. I've got a tedious job ahead of me. My point in posting this is that wire fires scare the crap out of me. I could have lost my car yesterday if I didn't go into action like Captain Sullenberger and have that battery terminal off with the toolkit open-end in about 30 seconds from detecting the smoke. Turns out there was a 20A fuse in a 5A circuit, which I would never do. But now as part of this whole thing I'm going to check every fuse size on my panel to make sure it doesn't happen again to another circuit. The embarrassing bit is to admit I've owned the car for 12 years and haven't done before this. What a wakeup call- you should all look at this, and add the fuses to the unfused instrument light circuit while you're at it.
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Ken 1986 930 2016 R1200RS |
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
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The interior lights and the glove box light are hot all the time so they can both light up when the motors not running. The momentary switches in the door jam and glove box ground the wires from the lights to turn them on.
Hope you can find whats gone wrong.. electrical problems suck. |
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Good luck with your wiring project, gsxrken. Nothing I hate more than laying under a dash. I answered my own question about the circuit breaker, If everything is working well you don't need it. I looked thru my fuel pump wiring, cleaned a few connections and tried testing with the circuit breaker installed. With the breaker installed the pump would run as long as I wanted but the wires get really hot proving the (cheap) pump to be bad. Does anyone know the best place to buy the original bosh 044? Somewhere I can be sure I am getting the real thing at a decent price?
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Steve 1981 SC Steel Widebody Outlaw in Pacific Blue and Artic White, 930/51 to 3.2l, K27 7006 Turbo, P&P Twin Plug heads, Twinfire Ignition, BLwur, Ruf Intercooler, Powerhaus headers, Zork, CIS Euro FD, 009 injectors, DOD, DP Lid, 044 pump, 930 4 sp LSD, Mocal 44 w/fan, LM2, Brembo, Retroair, Euromeisters. |
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Location: S. Florida
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Buy your fuel pump from Chris at Turbokraft. You know you'll be getting a genuine Bosch 044 from him and he helps out here more than anybody.
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This may be the time to give our host some payback, I try to give them most of my business since they make all of this possible. I'm sure it would be the real thing.
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Steve 1981 SC Steel Widebody Outlaw in Pacific Blue and Artic White, 930/51 to 3.2l, K27 7006 Turbo, P&P Twin Plug heads, Twinfire Ignition, BLwur, Ruf Intercooler, Powerhaus headers, Zork, CIS Euro FD, 009 injectors, DOD, DP Lid, 044 pump, 930 4 sp LSD, Mocal 44 w/fan, LM2, Brembo, Retroair, Euromeisters. |
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Join Date: Jun 2015
Location: Down South, USA.
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Check wiring for short!!
Cheers. |
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I've gone native
Join Date: Sep 2011
Location: Long Island, NY
Posts: 1,695
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I had a similar issue on my slant, dash started smoking, had seconds to get that neg terminal off.
One of my power window wires was shorting out. If you're blowing fuses within seconds you have a short.
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'07 997.1tt Blk/blk 600hp, bad to the bone |
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