Ed:

The injectors are new but not from  Mazda.
I pulse tested them by hooking them up to an air compressor set at 45

psi.

no test of duration but you can feel air pulses when you spin the

engine.

The coils are new 98 Chevy coils.  This happened when I found out that

Mazda

wants $1,200.00 for their coil set and Tracy says they should be

modified for

aircraft use.
One coil per plug and Tracy modified his EFI to handle them.

The only other item that may be a problem is I am only showing about 25

psi

fuel pressure.  This has to be the pressure regulators on the fuel rails
since the pumps are the ones supplied by Tracy and rated at 90 psi.

Still Trying.

Hank

That will do it. The amount of fuel injected is directly
related to the fuel system pressure.

Paul Lamar

Hank,

I agree with Paul, when my fuel pressure drops below 30 psi the engine
starts to lean and run rough.  I agree it appears to be the fuel pressure
regulator as my pumps (used 160 hour of running) still produce over 85 psi
without the regulator.  The only other thing I can think of is perhaps a
fuel filter could be impeding flow and reducing pressure.  What size fuel
lines are you using, minimum should be -6 or 3/8" dia or perhaps even larger
for a three rotor 20B perhaps -8 or 5/16-1/2"dia.

Ed Anderson

 
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