Agree... much simpler situation if it's the contatcts, faston connector
crimps going bad, etc...
But, I believe the symptom is also the same as another pump failure mode
that I've had in the past. A winding of the motor opens up, or maybe
there's a bad or pitted commutator contact for one winding. What
happens is you have a "dead zone" on the motor, which has many
windings. If the motor happens to stop on the dead zone, it doesn't
start. The hammer tap jolts it and spins it just slightly, then it
catches the next winding and spins up. You're effectively playing
roulette with your pump motor... 9 out of 10 times it works, then you
hit the bad zone. When running, it's just 9/10ths (or whatever the
actual number of windings are) of full power, and you don't notice the
difference.
Brian can be right, and you should check the wiring and connections
first, could be that and look very similar. But if they're solid,
I'll bet that's what's up, and you need to go to the usual suspects and
get a new pump. Or, carry the hammer in the trunk for a while... ;-)
Jon
77 Spider
alfa-digest wrote:
Date: Wed, 25 Nov 2009 16:45:15 -0800 (PST)
From: Brian Shorey <[email protected]>
Subject: Re: [alfa] '72 Berlina Fuel Pump
Before you replace/rebuild the pump, you might try cleaning the electrical
contacts. If they're flaky, then tapping the pump with the hammer may have
jolted them. I'd try inspecting them and cleaning them first.
If that doesn't work, and the problem persists, I think it's best to replace
the pump.
bs
--
to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi
or email "unsubscribe alfa" to [email protected]
