Unfaithful thoughts!

Peter Golledge petergolledge at gmail.com
Thu Sep 8 07:00:26 PDT 2011

Ack!  Two pumps in series who would do such a thing.  Think of the MTBF on two pumps particularly if the "close to the tank" pump slowly dies and starves the pressure pump.

Oh hang on my 930 has that.  Guess I know where the Porsche Engineers from the team Turbo went. :-)  Probably the same guys who designed the 930 wiring so underrated that they literally melt fuel pump wiring at the fuse.

The delicious part is that most newer pickup diesel designs (Ford/Chevy anyhow) have two pump design.  You can imagine the cavitation when you starve a 20,000 Psi engine driven pressure pump.  In an age where pressure transducers cost cents you would think that manufacturers would put a sensor between the pumps to detect low pressure, no such thing on my 05 Ford.

On 9/8/2011 5:45 AM, Tony Hoffman wrote:
> I always thought the MB single wiper with a robotic sort of movement was
> pretty cool. Basically, it has a second gearbox at the bottom that moves it
> out as it goes to the corner of the W/S, then back in at the center and each
> of the ends. Well, that went out on Dad's 190E. Unlike Audi, it is still
> available. However, it's $1200. BTW, it has a plastic gear inside that the
> teeth break off of. Yea, right. Superior engineering, alright. Anyhow, we
> "fixed" it with a used one (with cracked teeth, but I greased the heck out
> of everything). It's still working, but when it goes I'll just replace it
> with a straight arm and smaller blade.
> Also, they run two fuel pumps in series. Never understood that one either.
> If you remove one, the car will run fine. BTDT for several friends/customers
> in the past.
> Tony
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