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Austin-sixteen-Cornwall
Joined: 01 May 2009 Posts: 26
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Posted: Fri May 01, 2009 8:24 pm Post subject: Engine does not rev. |
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Hi everybody - I have just acquired a1931 Austin Sixteen/Six Burnham saloon named Gemima. The engine starts OK (usually 1st or 2nd try) and it idles OK but when I try to blip the accelerator it coughs and splutters and the revs do not increase and there is no power. Mechanically the engine was stripped last year and a new piston fitted and the bore sleeved and new valve seats and valves fitted for running on unleaded. The plugs look rather black and sooty. Any ideas on resolving this would be very welcome. Thanks |
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47p2
Joined: 24 Nov 2007 Posts: 2009 Location: Glasgow
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Posted: Fri May 01, 2009 8:51 pm Post subject: |
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It sounds like fuel starvation, have you tried pulling out the choke and revving it? _________________ ROVER
One of Britain's Fine Cars |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22451 Location: UK
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Austin-sixteen-Cornwall
Joined: 01 May 2009 Posts: 26
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Posted: Fri May 01, 2009 9:09 pm Post subject: |
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Thanks for quick reply!
Yes - I was using different cominations of choke and accelerator with the same results. |
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Austin-sixteen-Cornwall
Joined: 01 May 2009 Posts: 26
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Posted: Fri May 01, 2009 10:15 pm Post subject: |
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The petrol is OK - The car was running OK up till last week but I will check the points tomorrow. |
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47p2
Joined: 24 Nov 2007 Posts: 2009 Location: Glasgow
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Posted: Fri May 01, 2009 10:44 pm Post subject: |
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Also worth checking the fuel pump is working under load. The jet on the carb float is another thing to check. _________________ ROVER
One of Britain's Fine Cars |
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Phil - Nottingham
Joined: 01 Jan 2008 Posts: 1252 Location: Nottingham
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Posted: Fri May 01, 2009 11:20 pm Post subject: |
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Check points gap and dizzy earthing. Too wide a gap will reduce spark intensity at higher revs. Sam eeffect can becaused by faulty coil or condensor and ignition too far retarded
However sooty plugs indicate too rich a mixture, assuming its not a SU carb, air bleed jets can become blocked after standing _________________ Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2 |
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Rusty
Joined: 10 Feb 2009 Posts: 204 Location: Bunbury, Western Australia
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Posted: Sun May 03, 2009 2:58 am Post subject: |
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I remember working on a post war large Austin about 35 years ago, it came in with simmilar symptons.
Turned out to be a blocked muffler.
Likelyhood of this "VERY" low but sometimes if you cant find anything else, you never know !! |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22451 Location: UK
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peter scott
Joined: 18 Dec 2007 Posts: 7120 Location: Edinburgh
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Posted: Tue May 05, 2009 11:41 am Post subject: |
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If it were blocked carburettor jets you could check by simply pouring a little petrol down the air intake whilst blipping the thottle.
Peter _________________ http://www.nostalgiatech.co.uk
1939 SS Jaguar 2 1/2 litre saloon |
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pigtin
Joined: 23 Nov 2007 Posts: 1879 Location: Herne Bay
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Posted: Tue May 05, 2009 12:59 pm Post subject: |
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I had a similar problem on my 10/4 twice. Both times it turned out to be the rotor arm, one of them a fairly new one. It's almost impossible to see when one has broken down electrically.
Don. _________________ Due to the onset of my mid eighties I'm no longer sprightly and rarely seen in my Austin special. I have written a book though. https://amzn.eu/d/7rwRRqL |
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Austin-sixteen-Cornwall
Joined: 01 May 2009 Posts: 26
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Posted: Sun May 10, 2009 10:35 pm Post subject: |
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Thanks for all your suggestions and apologies for delay in replying ( Too busy trying to repair the car). Progress? so far – Carb. -Cleaned out every orifice I can find without any improvement. Timing – Fiddling with it made the engine run better but still not right. Changed plugs –Not much improvement.
Next I will change the HT leads, Distributor cap & Rotor arm ( when I can find a source for these items- any suggestions gratefully received). |
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Phil - Nottingham
Joined: 01 Jan 2008 Posts: 1252 Location: Nottingham
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Posted: Sun May 10, 2009 11:10 pm Post subject: |
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The Distributor Doctor may well have the parts if has a Lucas dizzy - have you tried a substitute coil and is yours connected correctly _________________ Rover P2
Rover P4
Rover P5 & P5B
Land Rover S2 & S3
Morris Mini Traveller Mk2 |
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Nic Jarman
Joined: 05 Oct 2008 Posts: 1031 Location: Stoke by Clare, Suffolk
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Posted: Sun May 31, 2009 10:28 pm Post subject: |
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For Lucas parts check under Restoration - Advice - Electrical then ROTOR ARMS. This will give you a link to a supplier. Good luck and my bet is condenser. |
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Austin-sixteen-Cornwall
Joined: 01 May 2009 Posts: 26
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Posted: Thu Jun 11, 2009 10:06 pm Post subject: |
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Sucess at last!!!!!!! I have finally resolved my problems - It turned out to be a leak in the inlet manifold gasket. The manifolds are attached using 5/16 BSF brass nuts which when tightened started to strip. I have replaced these with new steel nuts and solved the problem. At some stage I may change them for brass ones made in my lathe. I have not yet been able to locate distributor cap & rotor arm but will keep tryng.
A further cause for celibration is that she had her MOT today and will pass after a few minor corrections.
Thanks to all for all the help and advice. |
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