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<... fuel pressure would begin dropping, along with power, and exhaust temps
would rise ...>
That'd be my guess too. So an engine monitor showing both pump pressures (if
parallel) would show a decay in pressure. I'd be comfortable using both pumps
for TO and landing, switching them enroute one to the other. Matter of fact,
didn't I decide last spring to design my fuel system to have left pump draw
from left wing, right pump from right wing anyway?
Yes I did :o) Having a senior moment here ... Jim S.
Mark Steitle wrote:
Does anyone know with any accuracy how fuel pumps fail? I
>doubt they fail catastrophically. I suspect they fail by degrees
>(probably very gradually as the poorly maintained filter clogs up).
I went through this scenario a few years ago on my 88 Chevrolet p/u with
EFI. The engine warning light would come on when climbing grades. Also,
power would drop off significantly. When reading codes it indicated too
lean a/f mixture. (I assume this was due to very low fuel
pressure). Things returned to normal once the new fuel pump was
installed. So, my guess is that the fuel pressure would begin dropping,
along with power, and exhaust temps would rise. Pulling back on the
throttle should help some.
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