[DML] Noisy Fuel Pump (was: my first Delorean; vin11501 (a bit long))
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[DML] Noisy Fuel Pump (was: my first Delorean; vin11501 (a bit long))

Probably lots of reasons for a noisy fuel pump, but if it's happening 
only after extended use (mine took about 45 mins), you might consider 
fuel temps becoming excessively high due to radiator heat blowing back 
over the fuel tank.  The pump will eventually stop pumping (at least 
mine did).  Have a dubious wife as a passenger at the time and the 
questions about why you bought a D will start anew (trust me on this).

You might try a $30 indoor/outdoor thermometer with the outdoor probe 
on top of the outer fuel pump boot (mine is between the two fuel 
lines) or some other form of temp gauge.  Keep an eye on the temps 
while you drive. See if the noise starts when the temps are 
excessively higher than when the pump was quiet.

Heat shields and other methods are available to keep the fuel temp 
down if that is your problem.


> 2) Fuel pump gets loud after running for long periods. (at first I 
> thought it was the fans running!), so perhaps that will be the first 
> thing to fail.  I think I'll replace it just because it's
> easier to 
> fix something failing before its necessary to fix it.

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