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<DIV>We spent many many hours chasing this problem on several different cars.
Everything from Healey, Triumph and MGs.</DIV>
<DIV>The final find was that they were leaning out at high steady RPMs. And the
Healey Tri Carb was the worst.</DIV>
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<DIV>The cure after many attempts was found that due to the Ethanol in the fuel
the engine was progresivly getting leaner and leaner the higher the rpm range.
This was found by installing a O2 sensor in the tail pipe and monitoring the
mixture while driving. So what we ended up doing to cure the problem was
to install Rich Needles and instantly the problem went away.</DIV>
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<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Century'; COLOR: #000000">David
Nock<BR>British Car
Specialists<BR>209-948-8767<BR>www.britishcarspecialists.com</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=cardocgolden@gmail.com
href="mailto:cardocgolden@gmail.com">Bruce Starke</A> </DIV>
<DIV><B>Sent:</B> Tuesday, July 31, 2018 8:14 PM</DIV>
<DIV><B>To:</B> <A title=healeys@autox.team.net
href="mailto:healeys@autox.team.net">healeys</A> </DIV>
<DIV><B>Subject:</B> [Healeys] SU fuel pump --thanks!</DIV></DIV></DIV>
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<DIV dir=ltr>HI all, just wanted to give thanks to all the very knowledgeable
listers who give so freely of their time and expertise. I hope to
have cured my higher rev range fuel starvation problem and I must give thanks to
Kees for pointing me in the right direction with a comment he made on June
26<BR>" <SPAN
style="FONT-SIZE: small; FLOAT: none; DISPLAY: inline; text-decoration-style: initial; text-decoration-color: initial">The
AZX1307 is not the correct pump for the AH. The original on later cars was
AUF300 series, mostly 301 but there are some variations. The replacement of the
AUF301 is AZX1308 which delivers a higher pressure, if my memory is correct
3,8psi versus 2,7psi"</SPAN>
<DIV><SPAN
style="FONT-SIZE: small; FLOAT: none; DISPLAY: inline; text-decoration-style: initial; text-decoration-color: initial">That
is when the figurative bulb over my head went on! I had replaced the fuel pump a
couple of years ago but had not connected the 2 events ( fuel starvation and the
new pump)<BR>I checked on my car and sure enough, I had the AZX1307 . I
ordered the AZX1308 and have just installed it --will try it out tomorrow
once I am sure there are no leaks </SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: small; FLOAT: none; DISPLAY: inline; text-decoration-style: initial; text-decoration-color: initial">once
again , thanks to all!</SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: small; FLOAT: none; DISPLAY: inline; text-decoration-style: initial; text-decoration-color: initial">Bruce
</SPAN></DIV>
<DIV><SPAN
style="FONT-SIZE: small; FLOAT: none; DISPLAY: inline; text-decoration-style: initial; text-decoration-color: initial">Golden
BC<BR>1962 Tricarb</SPAN></DIV></DIV>
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