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Rootes75



Joined: 30 Apr 2013
Posts: 3117
Location: The Somerset Levels

PostPosted: Sun Sep 27, 2020 1:27 pm    Post subject: Non Starter... Reply with quote

Having trouble with one of our Commer trucks.

New plugs, points, HT leads etc. Checked for spark and its there. Set the timing. Checked all the fuel lines and there is a good supply to the carb.

Start her and she turns over lots of times before spluttering and not firing properly. Give her full choke and this time she does fire but then immediately cuts out. Give her any throttle and same result.

Thoughts are timing and carb?
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1937 Ford 7w
1937 Hillman 80
1946 ERF C.I.5
1947 Hillman Minx
1955 Hillman Minx Mk8
1950 Commer R541
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ukdave2002



Joined: 23 Nov 2007
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Location: South Cheshire

PostPosted: Sun Sep 27, 2020 1:43 pm    Post subject: Reply with quote

What's changed since it last started properly?
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Rootes75



Joined: 30 Apr 2013
Posts: 3117
Location: The Somerset Levels

PostPosted: Sun Sep 27, 2020 3:19 pm    Post subject: Reply with quote

This is the first time we have worked on her and tried to get her going, trying to tick off possibilities.
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1937 Ford 7w
1937 Hillman 80
1946 ERF C.I.5
1947 Hillman Minx
1955 Hillman Minx Mk8
1950 Commer R541
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MVPeters



Joined: 28 Aug 2008
Posts: 755
Location: Northern MA, USA

PostPosted: Sun Sep 27, 2020 4:21 pm    Post subject: Reply with quote

Most likely clogged carb jets from the old fuel.
A generous dose of carb cleaner might work, but can you strip & clean it & blow all the passages out?
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Rootes75



Joined: 30 Apr 2013
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Location: The Somerset Levels

PostPosted: Sun Sep 27, 2020 6:09 pm    Post subject: Reply with quote

I think the next step will be to strip the carb. She turns over but doesnt fire and then floods. Spark checked and found at each plug so we are thinking fuel supply.
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1937 Hillman 80
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1947 Hillman Minx
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1950 Commer R541
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peter scott



Joined: 18 Dec 2007
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Location: Edinburgh

PostPosted: Sun Sep 27, 2020 7:31 pm    Post subject: Reply with quote

You might have an inlet manifold air leak?

Peter
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Rootes75



Joined: 30 Apr 2013
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Location: The Somerset Levels

PostPosted: Mon Sep 28, 2020 8:51 am    Post subject: Reply with quote

Haven't thought of that Peter, add that to the list.
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1937 Hillman 80
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1947 Hillman Minx
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1950 Commer R541
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alanb



Joined: 10 Sep 2012
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Location: Berkshire.

PostPosted: Mon Sep 28, 2020 8:28 pm    Post subject: Reply with quote

If it hasnít been run for a long time it could be dry bores or if it floods washed bores causing lack of compression to draw the fuel in, try squirting engine oil into the bores and turning the engine over several times, then try a little fuel in each plug hole the refitting the plugs and retrying. It worked on my Morris 8.
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Rick
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Joined: 27 Apr 2005
Posts: 21710
Location: UK

PostPosted: Tue Sep 29, 2020 8:20 am    Post subject: Reply with quote

alanb wrote:
If it hasnít been run for a long time it could be dry bores or if it floods washed bores causing lack of compression to draw the fuel in, try squirting engine oil into the bores and turning the engine over several times, then try a little fuel in each plug hole the refitting the plugs and retrying. It worked on my Morris 8.


I wondered about low compression, possibly an intermittently-sticking valve or two? Coupled with a possible air leak around the inlet manifold (or with anything that relies on vacuum pipes from it, such as a brake servo perhaps?) and a blocked jet somewhere.

RJ
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Sid



Joined: 20 Sep 2017
Posts: 74
Location: From whence cometh the mighty Lagonda

PostPosted: Tue Sep 29, 2020 3:27 pm    Post subject: Reply with quote

Have you checked the firing order? Sounds like the plug leads haven't been put back in the correctly.
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Rootes75



Joined: 30 Apr 2013
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Location: The Somerset Levels

PostPosted: Wed Sep 30, 2020 1:15 pm    Post subject: Reply with quote

Hi Sid, Yes plug leads checked and all in the correct firing order. We are getting a spark at each too. We have also set the timing as per the Instruction manual.

This is the first time we have carried out any work on the truck so I managed to get in touch with the previous owner. Interestingly he said years back he had the same issues and ended up removing the manifold and cleaning the carb etc. I am very much erring on the side that the manifold may not have been sealed correctly so with everything else checked over so far that will be our next task.

Remove the manifold, clean all the surfaces down and then re-gasket and re-seal.
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1937 Ford 7w
1937 Hillman 80
1946 ERF C.I.5
1947 Hillman Minx
1955 Hillman Minx Mk8
1950 Commer R541
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Sid



Joined: 20 Sep 2017
Posts: 74
Location: From whence cometh the mighty Lagonda

PostPosted: Wed Sep 30, 2020 5:45 pm    Post subject: Reply with quote

Rootes75 wrote:
I think the next step will be to strip the carb. She turns over but doesnt fire and then floods. Spark checked and found at each plug so we are thinking fuel supply.

Just throwing ideas out there, could the needle valve be sticking? It's always hard to diagnose a fault without actually "being there".
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Rootes75



Joined: 30 Apr 2013
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Location: The Somerset Levels

PostPosted: Thu Oct 01, 2020 12:39 pm    Post subject: Reply with quote

I will strip the carb down, fuel is getting to it cause when the banjo inlet is slackened off fuel leaks out. Also, turn it over a few times and it does flood badly.

Any ideas or help is welcome.
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1937 Ford 7w
1937 Hillman 80
1946 ERF C.I.5
1947 Hillman Minx
1955 Hillman Minx Mk8
1950 Commer R541
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Rootes75



Joined: 30 Apr 2013
Posts: 3117
Location: The Somerset Levels

PostPosted: Sat Oct 03, 2020 5:13 pm    Post subject: Reply with quote

So removed the carb this morning, have spent the afternoon stripping and cleaning it down. No blocked jets but I did find a blockage in the air retard pipe.
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1937 Ford 7w
1937 Hillman 80
1946 ERF C.I.5
1947 Hillman Minx
1955 Hillman Minx Mk8
1950 Commer R541
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Rootes75



Joined: 30 Apr 2013
Posts: 3117
Location: The Somerset Levels

PostPosted: Sun Oct 11, 2020 12:34 pm    Post subject: Reply with quote

Managed to get the manifold off today, found the remains of a homemade gasket and that the previous gasket hadn't been completely removed before that! The copper gasket to the exhaust was non existent also.
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1937 Ford 7w
1937 Hillman 80
1946 ERF C.I.5
1947 Hillman Minx
1955 Hillman Minx Mk8
1950 Commer R541
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