| Re: [GMCnet] EFI Question [message #349764 is a reply to message #349762] |
Tue, 29 October 2019 18:25   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
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Senior Member |
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This might get into reaction time for O2 sensor response to rapid
pulsations of different concentrations of air/fuel. I have not got a clue
how rapidly the sensor can read changes like we are discussing. But, I bet
Matt can shed some light on it.
I do know from 1st hand experience that when the system is in closed
loop, that very tiny changes, like a misfiring plug or an injector that
sprays odd patterns occasionally due to foreign stuff in the fuel stream,
will cause fluctuations in rpm. So, is the computer playing catch-up with
erratic information from sensors? I dunno.
Jim Hupy
Salem, Oregon
On Tue, Oct 29, 2019, 4:11 PM John R. Lebetski via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Because the flow in the tube is more like "- - -- " in the left bank and
> " -- - - " in the right bank. The low pressure gaps are pretty big where
> two consecutive cylinders fire on the opposite bank in the 18436572. This
> can ingest outside air into the leak. False high O2 tells computer to add
> fuel.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
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