G'day
I had a similar problem with the BN3 a few years back. Six-cylinder engine,
twin H6 carbs and standard 100 fuel tank.
Would seem to run at low revs without a problem, but just wouldn't
accelerate with any sort of enthusiasm.
The 100 filler cap has a breathing hole which was blocked and the inline
plastic fuel filter was poor quality and not helping. On clearing the
breathing hole and sending forth the filter to a nunnery, it ran perfectly.
Hoo Roo
Patrick Quinn
Blue Mountains
Australia
-----Original Message-----
From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Derek Job
Sent: Monday, 30 June 2014 4:52 PM
To: Mark J Bradakis
Cc: healeys
Subject: Re: [Healeys] Tuning
Mark, I had the same problem with one of my Healeys. It was caused by a
cheap after market filler cap.
On Mon, Jun 30, 2014 at 6:03 AM, Mark J Bradakis <mark@bradakis.com> wrote:
> I worked on a car a while back that was exhibiting similar symptoms,
> but it was a late rubber bumper MGB with various emissions stuff on
> it. There was one particular hill where it alwayshad problems.
> I had been over everything I could think of, and could not figure it out.
> So after trying something
> I took it for a road test and as usual had problems getting up this
> particular hill. I pulled off to the side, parked, and got out,
> walking around the car, thinking. On one trip around the back of the
> car I took the gas cap off, and as I was doing so a HUGE rush of air
> went into the tank.
>
> The main problem was a blocked vent line, so the sealed fuel system
> could only let out so much gas before the vacuum was more than the
> pump could handle. It ran better, but it was still a dog ;-)
>
> mjb.
>
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