[Healeys] Missing under Load

[Alan Seigrist]

Yeah, usually missing under load is almost always specifically related to
fuel delivery.  And yes cheap gas can ruin fuel pumps, I had one gas
station where if I filled up, it would destroy the fuel pump on my old '66
Bronco.  Literally every single time, went through three fuel pumps before
I stopped buying the cheap gas, and then I was fine.

So I'd look at the fuel pump, also check the tank and make sure nothing is
blocking the pickup.  The black crud could be from a disintegrating
diaphragm.  You can see  the pickup if your remove the fuel sender.  Beware
of fumes, don't use a lighter to illuminate!

Alan

On Wed, Jun 3, 2015 at 8:55 AM, R. Price Lindsay <050.rpl at gmail.com> wrote:

> Until recently my BJ8 has run like a champ.  I now have a slight
> hesitation/miss on acceleration in all gears and when standing still.  I
> have cleaned the carbs (some black silt was in the bowls) and re-tuned the
> engine a couple of times as well as changed the plug wires and cap last
> night.  The engine ran like a top when I went to bed.
>
> Not being one to leave good enough alone I decided to check and see if it
> was the distributor cap or the plugs that were the problem (I thought it
> had to be one of the two).  So this morning I put the old wires into the
> new cap, started it up and it ran rough.  I then tried the new wires in the
> old cap, started it up and it ran rough.  So I returned everything to how
> it was last night and now it runs rough with everything the same as last
> night.  Goblins must have gotten in there over the night, I guess.
>
> Anyway, I’ve read the archives and tried most of the suggestions.  Today I
> removed the fuel filter, no difference although there was a bit of the
> black silt in the filter and the fuel looked cloudy (never had this before,
> it’s always been clear - byw, silt was in the carb bowls as well).  I
> looked at the distributer and plug wires in the dark, and there was some
> light at the location of plug No. 6.  When I put my finger behind the left
> exhaust pipe I got only very hot air.  When I placed my finger behind the
> right exhaust pipe I got a fluttering sound.  I’ve put in 2 new rotors, no
> change.
>
> 1. The coil is probably 15 years (10,000 miles) old.  I would test it but
> I don’t really know how.  Any suggestions on how to test the coil???
>
> 2. I don’t want to jump to any conclusions, BUT, the miss started maybe 50
> miles after filling up at a discount gas station (there was little
> choice).  Could the gas I put in be the culprit causing issues somewhere
> down line from the tank, i.e. clogging the fuel pumps (do they have
> internal filters - I don’t know)???  I’ve read about the lining of tanks
> dissolving and causing issues.  *If* the fuel I put in was high in
> ethanol, for example, could it dissolve the tank lining?  Is the residue
> from a dissolving tank lining a fine silt like product or something else?
>
> I really appreciate any light you can throw on this and empathize with
> those that have preceded me with this kind of problem.  It is totally
> frustrating!!
>
>
> Price Lindsay
> 67 BJ8
>
>
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