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Comanche Fuel System
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Topic starter
08/05/2020 3:52 pm
Fuel Press Drops When Boost Pump On
by Paul Burrell » Thu Feb 04, 2016 12:19 am
1970 PA-24-260C Turbo
With the engine running, my fuel pressure drops 2 PSI when I turn on my fuel boost pump. Boost pump works fine for starting etc.
Dukes boost pump.
Any ideas?
Paul in Houston
- Paul Burrell
- Posts: 1
- Joined: Sun Jun 22, 2014 10:58 pm
Re: Fuel Press Drops When Boost Pump On
by Zach Grant L1011jock » Thu Feb 04, 2016 3:30 am
You might be sucking air from the pump or the pump fittings, or the fuel strainer or selector. If you can't find the issues try putting a clear hose between the firewall and the engine driven pump and see if there is any difference boost pump on or off as far as bubbles etc.
"Keep it above 5 feet and don't do nuthin dumb!"
Zach Grant L1011jock- Technical Advisor
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- Joined: Mon Mar 22, 2004 4:35 pm
- Location: Indianapolis KEYE