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David,
How are your pumps plumbed... in parallel or series? What kind of
pressure do you get when running the backup pump only?
Mark
On 6/13/12, Tracy <rwstracy@gmail.com> wrote:
Hmmmm... Mine goes up about a pound when I switch on the second pump. What
happens when you turn both off?
Tracy
Sent from my iPad
On Jun 12, 2012, at 7:11 PM, hoursaway1@comcast.net wrote:
Question about fuel pressure indications, at fast idle 2200 RPM, fuel
pressure is 42 PSI on EM2, if I switch on the back-up pump with the
primary pump the pressure drops to 35 PSI, can here both pumps running, if
I switch off either pump pressure goes back to 42 PSI. My system is 13B,
stock red injectors all four, pressure regulator is stock Mazda on the end
of fuel rail with vacume connection from dynamic chamber. Thanks, David
R. Cook RV6A Rotary.
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