Pulling the choke out would richen the mixture--so it sounds like it's too lean.
Backfiring through the carb is also a symptom of lean (through exhaust is
typically rich). Don't know anything about SU's thought so here I must stop.
Geoff Branch
'74 Meejit "Yellow Peril"
'72 Innocenti 1300 Mini
----- Original Message -----
From "Bill Gilroy" <w.gilroy at verizon.net>
To: <spridgets@autox.team.net>
Sent: Friday, September 28, 2001 9:50 PM
Subject: Car stumbles, misses and runs rough
> My Midget has started to run rough and stumble, will barely
> accelerate, and I will get the rare backfire out one of the carbs at less than
> 2500 RPM. The car will run fine if I pull out the choke to about 1/4 or 1/2.
It was
> running fine two days ago, this just started this morning. Some of
> the important information:
>
> 1) New plugs, points, condenser, dizzy car, and rotor about 1K
> miles ago.
> 2) A quick inspection of the stuff in the dizzy show that the cap
> and rotor are fine, but the points are starting to pit. How much
> pitting is to much?
> 3) I have not check the plugs yet.
>
> Any idea what this might be, over lean, intake air leak. Any ideas.
> Pulling out the choke has confused me.
>
> --
> Later,
> Bill mailto:w.gilroy@verizon.net
>
> "Facts are the enemy of truth"
> 77 Midget
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