Tony

The fuel pump also shares it power with the 02 sensor heater if i recall.

hans14914

Current rating on the fans is around 0.2A each... so not likely the culprit unless the harness shorted against something. I use Waytek products all the time with great sucess, this particular fuse holder is constructed using the same Tyco brass contacts that are used in the CE panel:

http://order.waytekwire.com/productd...FUSE%20HOLDER/

I also like it because the clear casing allows inspection of the contacts themselves. Waytek also has a nice selection of manual reset ATC breakers if you were interested:

http://order.waytekwire.com/products...%20Protection/

Hope you find the culprit, but I doubt it was the fans unless there was a wiring issue that led to a short somewhere.

Best of luck,
Hans

Rob Edwards

Hans-

Ha, already had that fuse holder in my 'cart' at waytek. I'll get everything re-wired with that holder and another fused source for the fans, and call it a day.

AO

Bummer on the short fun run. Glad to hear it's nothing serious.

My fun run in Green Bay was cut short too when the bearings in the TT decided to shift rearward. I can't rev the car past 4500 RPM without the gear shift rattling like crazy! My theory is that the while on the dyno the new exhaust generated a LOT more heat and softened up the rubber on the bearings, allowing them to slid back. My clutch pedal also went to the floor - indicating that I had boiled the clutch fluid (hard line is just a few mm away from the headers.)

At least it all held together for the trip back to MI. Actually, I've never had my car flat bedded. Had to leave it behind once, but never had it towed.

Rob Edwards

AAA+ FTW, LOL.

GregBBRD

Rob:

I agree with Jim.

A short circuit burns out a fuse instantly. Poor contact/excessive current draw makes heat and melts things.

I've got high current fuse holders....although they are almost always rated for 30 amps. Might be quicker to visit your "local" radio shack, than driving here.

I was pretty sure that you hadn't "lost" the fuel pump, when you called. Those pumps almost never fail once they are running and the "rollers" are turning....no matter how worn out they are. They almost always fail on "start-up", when a roller can get get twisted sideway and jamb against the body.

And how could there ever be a problem with a design that has brushes and an armature that runs submerged in fuel?

There's a pretty funny story about that whole design. Seemed like a huge percentage of the time, when a 911 ran out of fuel, the pump would be "bulged" and leak out of the "o-ring", once they got refilled with fuel. One time, when I was at a Bosch seminar, they had one of those question and answer periods, and I asked why they designed the pump with the armature submerged and why the pumps didn't explode. Of course I got back the explanation that it wan't a problem, since the pump gets no oxygen, which is what is required for the fuel to ignite. Of course, waiting for that answer, I then asked what happened when a vehicle ran out of fuel and air was introduced. Got a pretty comical exprression, without an answer to that one....

Needless to say, not running any of my own Porsches low on fuel is pretty high on my list of "safety" things.

GregBBRD

This relay and fuse is after that part of the circuit.

GregBBRD

Rob:

Running a 15 amp fuse in a curcuit that requires current close to that draw will always make that fuse hot...although this looks more like a "contact" issue between the fuse and the holder.

You'll be a lot happier with a 25 amp fuse, in that circuit.

Rob Edwards

That pic should be my avatar, illustrating my weak electric-fu...

Am headed to the hopsital for an untimely death, may stop by for a fuse holder and a 25 amp fuse if there's time...

BC

****. I never even thought about that. Crapioca.

Tony

We have a similar issue in Boeings..Some airplanes have been modified but others it is "recomended" that you turn off the center tank pumps leaving appx 500 lbs in them. (fuel is used here first before the wing tanks) Keeps the pumps submerged so they dont run "dry" and possibly over heat...and well

supercedar

Put's it in perpective I think. It sounds like this death is scheduled for later maybe? Thanks for all you did at Sharktoberfest and showing me the door panel removal. Hope your day gets better.
Thomas

S4ordie

Dayum Rob. The Curse of Sharktoberfest and or the Dark Side was strong this year. First the CLK kiss-crunch-kiss Friday morning and now this. Dang.

Erik and I headed to Arizona about 10:00a. Sorry we missed the fun run.

John Speake

The original pump did, certainly. The usual way to supply the 044 is to use the old fuel pump relay to trigger a new relay for the heavy current 044 pump. The new relay having a new fused direct feed from the battery

It's that new fuse that's melted, which shows it wasn't good quality, but I agree with Greg that it's best to use components that are somewhat over specificed when it is "mission critical".

77tony

Was thoroughly enjoying riding shotgun in Rob's stroker, and all of a sudden Rob says "I lost my clutch" then "I lost my engine" Rob then calmly pulled over onto the shoulder of the highway to search for a remedy. Really felt bad for Rob not being able to continue on with the group on his well thought out, pre-planned route. 77Tony