| [GMCnet] Re: Fuel pump in but no pumpy [message #362863 is a reply to message #362861] |
Tue, 16 March 2021 12:58   |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
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Shan,
A bit of unsolicited advice: Replace that mechanical pump with a block-off
plate and a bypass tube. Install 2 electric pumps (I like Carter 4070's),
powered through a SPDT relay controlled by the tank selector switch on the
dash. Eliminate the tank selector solenoid valve (which is almost certain
to give you trouble at some time, possibly leaving you beside the road) by
connecting one of those electric pumps to each of the tanks (use the
selector valve's wiring to control the relay). Tee the pumps' outputs
together into the OEM feed line.
With that setup, you'll have redundant pumps, eliminate the valve as a
failure point, and, if you mount the pumps near the tanks, you'll probably
never have a vapor lock problem; also, some add a prime button for
long-idle starts.
It's not a very expensive upgrade but a valuable one.
JMHO -- based on 20 years running that way.
Ken H.
On Tue, Mar 16, 2021 at 1:13 PM Shan Rose wrote:
> The carb bowl? Or the pump itself? I was wondering if the lever was
> engaging the cam. I put it in at TDC and it bolted right up, but nothing
> comes out
> of the line... :-/
> --
> 73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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