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Subject:Re: No Start 83.5: Fuel pump test?
From:Jake de Villiers
Date:Mon, 16 Jul 2007 12:59:30 -0700

I think it only pumps when cranking - there's no signal to the pump
otherwise.  It should be pouring out.

A pressure gauge would be best Don.

Have you tried blowing back through the lines?  Say pump to tank and motor
to pump?

On 7/16/07, Don Spence <dkspence@telus.net> wrote:
>
> 83.5 wbx,
>
> New ignition system, (yes I have spark), fires when I inject fuel
> into intake plenum. Does not fire otherwise. I have replaced the fuel
> filter, fuel pressure regulator (had a spare so why not), cleaned the
> injectors, checked the injector clips with a noid (yes good pulses on
> all four)  and I'm thinking that the pump is defective in it's
> pressure output. ( As in not enough pressure to squirt fuel under
> compression) The pump runs for 3 seconds when the ignition is turned
> on but with either an injector bar hose disconnected or the pressure
> release bolt removed  I get no squirting fuel back at the engine .
>
> Should this "open system" squirt fuel out of either or both of these
> openings?
>
> Is my thinking logical?  How  (sequence) should I check the fuel pump
> function. ( I don't have a pressure gauge though could acquire one if
> necessary.
>    TIA
>   Don ( the frustrated one)
>

--
Jake
1984 Vanagon GL
1986 Westy Weekender "Dixie"
www.crescentbeachguitar.com