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RE: Dist. replacement. - hesitation

Subject: RE: Dist. replacement. - hesitation
Date: Tue, 5 Feb 2002 10:39:39 -0500
Thanks Paul,

Looks like the first - when the choke is pulled more and longer, there is
much more power, but then the engine roars heavily @ 1500+ RPM when you wait
for the first traffic light.

The backfiring also occurs when the engine is running at "normal"
temperatures and the outside temperatures are at freezing level or lower.

How should I correct this?
Is the vacuum advance timing involved in this?
How should I check the vacuum advance mechanism?

Last saturday we had 15 deg. Celcius and great sunny weather, so driving the
GT was a pleasure. 
The wedding of the Dutch crownprince Willem Alexander with his Argetina wife
Maxima was a great event also by this  most exeptional temperature.
Never in a hundred years the 2nd of february was so warm.

As lucas is my best friend, I'll check the ignition wiring anyway, but I'm
convinced the wiring is fine. The problem is to reproducable and shows no
irregular occurences, which is typical for electrical problems.



-----Original Message-----
From: []
Sent: Tuesday, February 05, 2002 3:58 PM
Subject: Re: Dist. replacement. - hesitation

Could be a couple of things, Hans.

Could be weak on pick-up i.e. not enough damping hence enrichment when the
throttle is opened, easy to check by pulling out the choke when the
hesitation is happening and seeing if you suddenly roar off into the
winter's gloom.

Could also be a fractured wire inside the dizzie, being disturbed when the
points-plate twists under vacuum change.  Can be verified by removing and
plugging the vacuum line.

A Scimitar GTE I had nearly gave me heart-failure several times by cutting
out or severe hesitation just as I pulled out of a side-road onto a main
road.  In that case the ground connection to the points plate was simply by
sliding contacts rather than a flexible wire, and these contacts were known
to get iffy over time.  The cuire was to install a flexible wire inside the
dizzy, and that completely cleared the problem.  The MGB has that wire
anyway, but it can fracture, as can the points wire.


----- Original Message -----
From: <>
To: <>; <>; <>
Sent: Tuesday, February 05, 2002 10:11 AM
Subject: RE: Dist. replacement. - hesitation

> This hesitation triggered me:
> Since I have my BGT the engine shows some hesitation when the accellerator
> is pressed. This is felt best when this is done slowly when going at a low
> speed and low revs. It always occurs when going faster from a stable
> Especially when the engine is cold it is at worst.
> When hesitating then the engine sometimes backfires in the carburattors.
> When the engine comes to speed >2200 RPM the hesitation is over.
> The engine is recently tuned by a knowledgable guy.
> For the rest the car drives well.
> Dear list what is your opinion?

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