[NOBBC] Any thoughts on a starting issue?

[Greg Badano]

Thanks again for all of the suggestions.  I will let you know how it goes when
I get a moment to do some tinkering.  Just answering a couple of questions
about the set up in my Aceca.  It has its original AC engine and triple SU set
up.  I checked for some identifying number on the carbs and found "1160 L" in
raised characters on them.  I assume that is a part number but could not say
for certain.  For reference, the OD of the main body that has the dashpot in
the top appears to be around 2.32" and the ID of the air intake bore is 1.25".
 
More to come.
 
Greg

From: Robin Jackson <apexbrit2 at gmail.com>
To: North
Bay British Car Club <nobbc at autox.team.net> 
Sent: Monday, July 2, 2012 3:59
PM
Subject: Re: [NOBBC] Any thoughts on a starting issue?

The HIF-4 Carb(74
MGB) Has throttle shaft seals that wear and cause
uncertain starting. SU carb
needles and jets wear over time and may cause a
rich condition, especially on
choke starting. Periodic rebuilds are
necessary- or replacement. What carbs
are on the 59 AC? Replacement
Webers are not as challanging as the SU constant
velocity carbs.

Rj

On Mon, Jul 2, 2012 at 3:16 PM, Andy Preston
<andypreston at sbcglobal.net>wrote:

> Greg, I have the same problem with my 74
MGB GT sometimes and have tried
> most things.  First of all do a compression
check to rule out a leaking
> cylinder head gasket.  Do it cold and hot.  I
replaced all ignition system
> on my car and it didn't make any difference. 
Check the plugs in the
> morning
> prior to starting the car; I normally had
one of two clean ones and two
> that
> were either damp or wet.  If I
installed clean plugs it fired up
> immediately
> on all four cylinders.  So I
assumed it must be fuel related.  I cleaned
> and
> aired out the charcoal
canister and that seemed to help some.  I've
> adjusted
> the carbs and am
probably running a little lean.  When I start the car I
> usually spin the
engine with no choke at first and then just a little choke
> and then it
starts.  So far I'm learning to live with it but haven't really
> found the
answer.  If you discover the silver bullet let us know.
>
> BTW I have 3 other
MGs and they all start with no problems; maybe its smog
> related.
>
> Andy
>
> -----Original Message-----
> From: nobbc-bounces at autox.team.net
[mailto:nobbc-bounces at autox.team.net]
> On
> Behalf Of Greg Badano
> Sent:
Sunday, July 01, 2012 7:08 PM
> To: North Bay British Car Club;
NOBBC at yahoogroups.com
> Subject: [NOBBC] Any thoughts on a starting issue?
>
>
Hello all,
>
> I am hoping I can get some possible trouble shooting
>
suggestions for diagnosing a starting issue that has recently developed
> with
> my car.  It starts up almost immediately but it's not firing on all
>
cylinders.  It will lope along for a few minutes this way and then I can
>
hear
> and feel the missing cylinder(s?) start to kick in here and there until
it
> finally all six are firing the way they should and it idles smoothly at
500
> RPM.  Revs and drives just fine after this initial rough period as well.
>  It
> does this consistently if it has been sitting a while.  I pulled all
the
> plugs, cleaned and re-gapped them thinking perhaps one was fouled.  For
> what
> it is worth they were all pretty dark.  Maybe this is related and
maybe
> not.
>
> Any thoughts on what might be going or how I might isolate
the problem?
>
> Thanks in advance for any thoughts and suggestions.
>
> Greg
> 1959 AC Aceca
> _______________________________________________
>
NOBBC at autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested
annual donation  $11.47
> Archive: http://www.team.net/archive
> Forums:
http://www.team.net/forums
> Unsubscribe/Manage:
>
http://autox.team.net/mailman/options/nobbc/andypreston@sbcglobal.net
>
_______________________________________________
> NOBBC at autox.team.net
>
Donate: http://www.team.net/donate.html
> Suggested annual donation  $11.47
>
Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
>
Unsubscribe/Manage:
>
http://autox.team.net/mailman/options/nobbc/apexbrit2@gmail.com
_______________________________________________
NOBBC at autox.team.net
Donate:
http://www.team.net/donate.html
Suggested annual donation  $11.47
Archive:
http://www.team.net/archive
Forums: http://www.team.net/forums
Unsubscribe/Manage:
http://autox.team.net/mailman/options/nobbc/gsb1159@pacbell.net