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
209-948-8767
www.britishcarspecialists.com
From: Bruce Starke
Sent: Tuesday, July 31, 2018 8:14 PM
To: healeys
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!
Bruce
Golden BC
1962 Tricarb
--------------------------------------------------------------------------------
_______________________________________________
Archive: http://www.team.net/pipermail/healeys
Healeys at autox.team.net
http://autox.team.net/mailman/listinfo/healeys
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://autox.team.net/pipermail/healeys/attachments/20180801/44a662fd/attachment.html>
|