What
surprised me was that with the engine running at 2000, the pointer was
swinging very rapidly over a range of over a pretty wide range; from about 27
to 37 psi. It is an undamped bourdon-tube gauge, responding to a lot of
pulsing. I had no pulse filtering between the manifold and the fuel
pressure regulator.
Was the engine
running smoothly at 2000? Did all the improvements you made actually
allow you to run a smooth idle down around 1000 or so?
Yes it was; so I
can’t say the pulsing in the fuel pressure was interfering with the operation
at lower rpm; it was, at the least, indicative of uneven MAP and likely very
hard on the FP regulator. I haven’t run lower than about 1500 yet since
that is where the idle stop is set; and I am pursuing other issues. But it
does now run smoothly at that speed – secondary injectors only. The
other issues are that the “staging” is not working; it does not run completely
smoothly with both sets on; less smooth on primary only; and very smooth with
secondary only (primary turned off). If you can figure those things out
for me, you win the cigar. Still waiting on a new chip for the EM2, but
the next time I run I’ll slow it down further.
Al
Hi Al, Got your
new chip made and will ship it on the next canoe trip from Shady
Bend.
Tracy (Island
life sucks)