rveighta(at)comcast.net
Guest
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 Posted: Mon Sep 21, 2009 10:40 am Post subject: Fwd: Engine Hesitation - Case Closed |
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Gang, I got this answer back from Gus Funnell at Van's regarding my engine hesitation problem. This, in
addition to my response from Don Rivera at Airflow, makes me believe this is a common occurrence. I don't
plan on pursuing it further....
Walt Shipley
----- Forwarded Message -----
From: "Gus Funnell" <gusf(at)vansaircraft.com>
To: rveighta(at)comcast.net
Sent: Monday, September 21, 2009 1:13:09 PM GMT -05:00 US/Canada Eastern
Subject: Re: Engine Hesitation
Erratic idle is common with FI engines in RVs on hot days. A pump shroud
may help, but not much, as there is little airflow through the cowl at taxi
speeds to cool down a heat soaked engine/pump.
Vans
On 21 Sep 2009 at 15:18, rveighta(at)comcast.net wrote:
| Quote: | Hi, I have an IO-360 B4A in my RV-8A that exhibits "stumbling" at
idle when I'm taxiing in from a
flight on a warm day. I'm guessing
this is caused by fuel vaporization somewhere in the fuel system.
I have already contacted Don Rivera at Airflow Performance and
obtained a set of four nozzles
that have a smaller orifice than
standard, with the theory that the increased pressure would prevent
the stumbling or at least
improve engine smoothness.Since
installation of the new nozzles, the engine does run smoother, but
the occasional stumble is still
there.
My question is this - is this pretty normal for fuel injected RV'S?
Also, is the cooling shroud you
sell for the fuel pump effective in
eliminating the engine stumbling ?
Thanks,
Walt Shipley RV-8A 80877
Chuckey, TN
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