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Rick, Lean, maybe. What do the plugs look like? If I understand here, sim=
ply the engine will not rev over 3000 even it the throttle is wide open.
paul
On Mar 26, 2020, at 11:17 AM, Richard Lindsay via Mgs <mgs@autox.team.net<m=
ailto:mgs@autox.team.net>> wrote:
Hello friends,
We're house-bound here in Houston with a stay-at-home order in place. My=
chores are done and Nancy's SUV is 'clayed' and waxed. It looks as-new, wh=
ich is pretty good for any SUV.
This morning, after finishing the Toyota, I went back to work on my '53 =
MG TD. It started right up and ran up to a smooth 3000rpm. After that, the =
choke control immediately went in a bit leaving the engine to idle at 2000r=
pm, with the choke lightly applied. After warm, and with the choke pushed f=
ull in, the idle dropped to about 900rpm, with a few misses preventing a to=
tally smooth idle. And those words begin my question.
The engine stumbles when given a little 'wellie' and after gaining engine=
speed, it runs quite unevenly. No amount of coaxing will get it over 3000r=
pm. So, what's wrong?! Timing is set properly.
The stumble is characteristic of leaning out, as when the carb dampers a=
re empty. And overly lean charge is indicated by the fact that when cold, w=
ith enrichment, to engine will rev to 3000rpm easily.
I'm going to lower the jets another couple of 'flats' to see if that hel=
ps. In the mean time I ask: What else might I have missed?
Rick
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Paul Osborne
Department of Electrical and Computer Eng
University of Rochester
201 Hopeman Building RC
Rochester NY 14627
585-275-5226
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<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space;" class=3D"">
Rick, Lean, maybe. What do the plugs look like? If I understand=
here, simply the engine will not rev over 3000 even it the throttle is wid=
e open.
<div class=3D""><br class=3D"">
</div>
<div class=3D"">paul</div>
<div class=3D""><br class=3D"">
</div>
<div class=3D""><br class=3D"">
<div>
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On Mar 26, 2020, at 11:17 AM, Richard Lindsay via Mgs <<=
a href=3D"mailto:mgs@autox.team.net"; class=3D"">mgs@autox.team.net</a>> =
wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div dir=3D"auto" class=3D"">Hello friends,
<div dir=3D"auto" class=3D""> We're house-bound here in Houston=
with a stay-at-home order in place. My chores are done and Nancy's SUV is =
'clayed' and waxed. It looks as-new, which is pretty good for any SUV.</div=
>
<div dir=3D"auto" class=3D""><span style=3D"font-family:sans-serif" class=
=3D""> This morning, after finishing the Toyota, I went back to=
work on my '53 MG TD. It started right up and ran up to a smooth 3000rpm. =
After that, the choke control immediately went in a
bit leaving the engine to idle at 2000rpm, with the choke lightly applied.=
After warm, and with the choke pushed full in, the idle dropped to about 9=
00rpm, with a few misses preventing a totally smooth idle. And those words =
begin my question.</span><br class=3D"">
</div>
<div dir=3D"auto" class=3D""><span style=3D"font-family:sans-serif" class=
=3D""> The engine stumbles when given a little 'wellie' and after gai=
ning engine speed, it runs quite unevenly. No amount of coaxing will get it=
over 3000rpm. So, what's wrong?! Timing is set
properly.</span></div>
<div dir=3D"auto" class=3D""><span style=3D"font-family:sans-serif" class=
=3D""> The stumble is characteristic of leaning out, as when th=
e carb dampers are empty. And overly lean charge is indicated by the fact t=
hat when cold, with enrichment, to engine will rev to
3000rpm easily. </span></div>
<div dir=3D"auto" class=3D""><span style=3D"font-family:sans-serif" class=
=3D""> I'm going to lower the jets another couple of 'flats' to=
see if that helps. In the mean time I ask: What else might I have missed?<=
/span></div>
<div dir=3D"auto" class=3D""><span style=3D"font-family:sans-serif" class=
=3D""><br class=3D"">
</span></div>
<div dir=3D"auto" class=3D""><span style=3D"font-family:sans-serif" class=
=3D"">Rick</span></div>
</div>
_______________________________________________<br class=3D"">
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webkit-line-break: after-white-space;">
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webkit-line-break: after-white-space;">
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webkit-line-break: after-white-space;">
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ariant-ligatures: normal; font-variant-position: normal; font-variant-numer=
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l; line-height: normal; border-spacing: 0px;">
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webkit-line-break: after-white-space;">
<blockquote cite=3D"mid:04744FC0-4DB2-40B3-8E8A-EF89713DC932@z.rochester.ed=
u" type=3D"cite" class=3D"" style=3D"orphans: 2; widows: 2;">
<div class=3D"">
<div class=3D"">
<div class=3D""><span class=3D"Apple-style-span" style=3D"border-collapse: =
separate; font-variant-ligatures: normal; font-variant-position: normal; fo=
nt-variant-numeric: normal; font-variant-alternates: normal; font-variant-e=
ast-asian: normal; line-height: normal;"><span class=3D"Apple-style-span" s=
tyle=3D"border-collapse: separate; font-variant-ligatures: normal; font-var=
iant-position: normal; font-variant-numeric: normal; font-variant-alternate=
s: normal; font-variant-east-asian: normal; line-height: normal;">
<div class=3D"" style=3D"word-wrap: break-word;">
<div class=3D"">
<div class=3D"">
<p class=3D"MsoNormal" style=3D"margin: 0in 0in 12pt; font-size: 12pt;">Pau=
l Osborne<br class=3D"">
Department of Electrical and Computer Eng<br class=3D"">
University of Rochester <br class=3D"">
201 Hopeman Building RC<br class=3D"">
Rochester NY 14627<br class=3D"">
</p>
</div>
</div>
</div>
</span></span></div>
</div>
</div>
</blockquote>
<div class=3D"" style=3D"orphans: 2; widows: 2;"><span class=3D"Apple-style=
-span" style=3D"font-size: 16px;"> 585-275-5226</span><span cla=
ss=3D"Apple-tab-span" style=3D"white-space: pre;">
</span></div>
<div class=3D""><br class=3D"">
</div>
</div>
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