[Healeys] SU fuel pump --thanks!
cardocgolden at gmail.com
Wed Aug 1 09:21:58 MDT 2018
thanks for the good news--I only use non ethanol fuel (94 RON--available in
Canada through Chevron) and had already used the next richer needles in an
attempt to cure the problem. There was certainly an improvement with each
of the changes but not a cure. Hopefully this will fix it now!
Thanks to all once more, your input is much valued
On Wed, Aug 1, 2018 at 9:01 AM David Nock BCS <healeydoc at sbcglobal.net>
> We spent many many hours chasing this problem on several different cars.
> Everything from Healey, Triumph and MGs.
> The final find was that they were leaning out at high steady RPMs. And the
> Healey Tri Carb was the worst.
> 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.
> David Nock
> British Car Specialists
> *From:* Bruce Starke <cardocgolden at gmail.com>
> *Sent:* Tuesday, July 31, 2018 8:14 PM
> *To:* healeys <healeys at autox.team.net>
> *Subject:* [Healeys] SU fuel pump --thanks!
> 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
> " 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"
> 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)
> 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
> once again , thanks to all!
> Golden BC
> 1962 Tricarb
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