back firing MGBGT through the carburetters

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back firing MGBGT through the carburetters

Post  Duncan i on Mon Oct 12, 2009 11:43 am

MGB GT 1978..Just put on new leads, dist. cap, coil and am fairly sure I got the leads back in the right order on the dist. cap. It goes, it starts but it is making
a hell of a noise by exploding fuel through the carbs and then via the
exhaust pipe.

I know you will say timing. I have now spent a lot of time changing the leads around re-timing it from tdc on the crank pulley etc. It has just passed its MoT. I want to use the car but the dear old ladies of Largs are suffering from cardiac arrest every time I go there...help.

If nothing else please recommend a decent garage who like MG's nearby.

Thanks!!

Duncan i
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Re: back firing MGBGT through the carburetters

Post  cur10k on Mon Oct 12, 2009 5:31 pm

Sounds like ignition!

Call Paul McFadden at 01698 254141 for help!

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Re backfiring

Post  MGolf on Mon Oct 12, 2009 7:43 pm

Sounds as if the leads are mixed. Should be in the order of 1,3,4,2 with 1 nearest the radiator. On my distributor, 1 is in the 4 o'clock position. Static timing should be 5 degrees BTDC and 10 to14 degrees at 1000rpm with the vacuum pipe disconnected. Did you remove the whole distributor? If so, the timing may be 180 degrees out and No.1 cylinder will be nearest the bulkhead.
Don.

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Re backfiring

Post  MGolf on Mon Oct 12, 2009 7:46 pm

I forgot to add that "Parkhouse Garage", Parkhouse Road Ardrossan are MGB friendly and nearer than Motherwell!
Don.

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Backfiring through the carbs.

Post  Duncan i on Wed Oct 14, 2009 5:07 pm

Thanks to all who replied to me.

It seems such a simple thing but it will have to be Parkhouse
Garage!!. I will go and see them first.

I have exhausted all the most likely things I can think of and
I have tried the timing as well... as you suggest...no luck!!

Cheers,

Duncan

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Re: back firing MGBGT through the carburetters

Post  TD2 on Fri Oct 16, 2009 5:07 pm

Let us know the outcome, shame though I thought Largs could do with a bit of a wake up!

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Re: back firing MGBGT through the carburetters

Post  Willy Scott on Sat Oct 17, 2009 12:09 am

Duncan i wrote:MGB GT 1978..Just put on new leads, dist. cap, coil and am fairly sure I got the leads back in the right order on the dist. cap. It goes, it starts but it is making
a hell of a noise by exploding fuel through the carbs and then via the
exhaust pipe.

I see you are a guest. Ever thought of joining the Caledonian Centre maybe you are already a member but your name is not obvious. We have no Duncan with a last name beginning with "I" , lots of Activities see website www.mgcaledonian.org . You can join if you go to the links page and get a application form from MG Car Club site
WS Secretary

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Re: back firing MGBGT through the carburetters

Post  Willy Scott on Fri Nov 20, 2009 1:11 pm

Duncan i wrote:Thanks to all who replied to me.
It seems such a simple thing but it will have to be Parkhouse
Garage!!. I will go and see them first.
I have exhausted all the most likely things I can think of and
I have tried the timing as well... as you suggest...no luck!!
Cheers,
Duncan

Please let us know the result of your miss fire, did you get a solution?

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Re: back firing MGBGT through the carburetters

Post  Chump on Fri Nov 20, 2009 1:20 pm

Did you solve the problem at all?

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