[T3] a stumper!

[Max Welton]

Maybe a harmonic that shows up in that range and is making some
connection unhappy?

Max

On Sun, May 16, 2021 at 8:16 AM Keith Park <topnotch at nycap.rr.com> wrote:
>
> Once the 2056 went in, for the first few hundred miles I had a miss between
> 2000 and 3000 RPM, fine at idle, fine about 3000 RPM, but it would go lean
> and miss,
>
> But it's a chicken or the egg issue, is it showing lean on the AFR because
> its missing or is it missing because it IS going lean?
>
> Anywho, I checked sensors, swapped out injectors, pressure sensors, looked
> for vacuum leaks and finally swapped out the control unit and it fixed it.
> Well,
>
> Its back, but intermittently, sometimes its fine.
>
>
>
> But.  WHAT could be causing a lean or missing issue ONLY between 2000 and
> 3000 RPM UNDER ANY THROTTLE RANGE?  I did pull the control unit again,
> tighten up the plug and used some contact cleaner on it and it was fine for
> a few miles after that but it came back on the way to the camp,  idles
> perfect, runs perfect on the highway, its just in that RPM range..
>
>
>
> Ideas?  I don't get stumped often but.
>
>
>
> It's a 2056 but stock D jet.
>
>
>
> Keith
>
>
>
>
>
> Topnotch Restorations
>
>  <mailto:topnotch at nycap.rr.com> topnotch at nycap.rr.com
>
>  <http://www.topnotchresto.com> http://www.topnotchresto.com
>
> 71 Squareback  "Hothe"
> 65 Notchback  "El Baja Rojo"
>
> 93 RX7  "Redstur"
>
> 13 Subaru Outback "Blendin"
>
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>
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