[Healeys] miss

[David Nock BCS]

We are starting to see a lot of miss fires and lack of power at steady high 
rpms. If it is miss firing and spitting back thru the carbs then you may be 
running lean due to the Ethanol in the gas.

With 10% Ethanol we are starting to see more and more problem with 
performance. Lean miss fires, hard starting cold and having to leave the 
choke out for a long time, engine temp higher that normal.

These  all point to the Ethanol which is causing the mixture to lean out 
under load. You cant just richen up the mixture because then it will be to 
rich at idle. What you may need to do is change to rich needles.

Then if the government in their wisdom changes to E20 we are going to have 
some real problems.

Some of the other issues that are coming up now with the Ethanol.
    Rubber hoses going bad
    Zinc Oxide developing in the carbs causing the aluminium to corrode
    Water getting into the system because the Ethanol is alcohol and it 
absorbs it out of the air
    Ethanol is also a cleaner so it flushes out the fuel system and then 
deposits all the scum that is in the system into the filters and pump



David Nock
British Car Specialists
Stockton Ca 209 948 8767
www.britishcarspecialists.com
-----Original Message----- 
From: Alex
Sent: Friday, March 14, 2014 8:31 AM
To: healeymanjim at hansencc.net ; healeys at autox.team.net
Subject: Re: [Healeys] miss

You say you checked the wires. Was that the primary wiring or the HV
secondary?

I have had high end misses that were the result of defective HV wiring. I've
seen elusive rust hiding under sparking plug caps, bad wire cores, etc.

Tractor Supply sells a great $20 kit of HV wiring for 6 cylinder cars. If
you're not a stickler for originality, this installation is a good way to
ensure your high voltage system is not the culprit. Tractor Supply's wire is
copper core!

== Alex in Maine
     "The Blue Mainie," 1960 Austin Healey 3000 BT7
     "Conkling," 1946 M.G. TC #1321
     Former owner 1957 A-H 100-6, 1967 A-H BJ8,
     1965 MG Midget
     http://home.roadrunner.com/~alexmm



----- Original Message ----- 
From: <healeymanjim at hansencc.net>
To: <healeys at autox.team.net>
Sent: Thursday, March 13, 2014 10:38 PM
Subject: [Healeys] miss


> developed a high rpm miss the last week or so.  changed plugs, checked 
> wires, replaced points, condenser, rotor, changed coil to no avail. 
> checked carbs for sticking pistons and dashpot oil.  what am i missing?
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