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Cough cough splutter splutter shudder shudder...
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TTotal



Joined: 30 Aug 2008
Posts: 90
Location: Titchfield Common, Fareham

PostPosted: Tue Jul 28, 2009 9:01 pm    Post subject: Cough cough splutter splutter shudder shudder... Reply with quote

Those are the symptoms (no its not Swine flu)

Billy is poorly, any tips?

Seems to be getting worse over last 1000 miles and last night took me 10 hours to get back from Bangor (270 miles)....

Billy actually refused a hill start without slipping the clutch in 1st.

Would not do more than 35 mph without jerking and spluttering.

Starts easy, ticks over no probs, revs ok. Only when under light load he is sick, under heavy load he is ok (ish)

??????


Cheers guys

John Sad
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Phil - Nottingham



Joined: 01 Jan 2008
Posts: 1254
Location: Nottingham

PostPosted: Tue Jul 28, 2009 10:23 pm    Post subject: Reply with quote

Bad petrol/water in it? Petrol filter blocked, air hole in tank cap blocked, carb jets blocked - has it got a Stromberg carb?

HT leads tracking/cracked cap/faulty coil or condensor. Timing slipped

These are the easy ones to check first
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Rick
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Joined: 27 Apr 2005
Posts: 21215
Location: North-west UK

PostPosted: Tue Jul 28, 2009 11:08 pm    Post subject: Reply with quote

Points gap?

Rick

(PS welcome back Smile)
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baconsdozen



Joined: 03 Dec 2007
Posts: 1119
Location: Under the car.

PostPosted: Thu Jul 30, 2009 11:47 am    Post subject: Reply with quote

Could it be a weak mixture under light load ?. Try pulling the choke out a wee bit next time it plays up,if there's a temporary improvement it could be an air leak or partially blocked jet.
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TTotal



Joined: 30 Aug 2008
Posts: 90
Location: Titchfield Common, Fareham

PostPosted: Fri Jul 31, 2009 7:33 pm    Post subject: Reply with quote

Thanks chaps!

Have tried easing out the choke, made no differance - even full choke!

Lots of people telling me the stanndard carb has poor history so am researching a replacement. Any ideas on companies to try?

Cheers

John Smile
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peter scott



Joined: 18 Dec 2007
Posts: 6229
Location: Edinburgh

PostPosted: Fri Jul 31, 2009 8:58 pm    Post subject: Reply with quote

TTotal wrote:

Lots of people telling me the stanndard carb has poor history so am researching a replacement. Any ideas on companies to try?

Cheers

John Smile


That sounds a bit drastic. What make and model of carb is it? It might be cheaper to pay for a visit to a rolling road.

Peter
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mikeC



Joined: 31 Jul 2009
Posts: 1562
Location: Market Warsop, Nottinghamshire

PostPosted: Sat Aug 01, 2009 8:42 pm    Post subject: Reply with quote

Could be dirt in the petrol - specifically a blocked, or partially-blocked main jet in the carb. I would suggest stripping and cleaning as a first move, before considering a replacement.
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Nic Jarman



Joined: 05 Oct 2008
Posts: 1035
Location: Stoke by Clare, Suffolk

PostPosted: Sat Aug 01, 2009 11:09 pm    Post subject: Reply with quote

John, what carb are you using? The report of it running OK under load is confusing. It does sound like the carb is knackered. My Midget would not run nicely so I replaced all the carb internals, this did the trick. Good luck.
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Austin-sixteen-Cornwall



Joined: 01 May 2009
Posts: 26

PostPosted: Sun Aug 02, 2009 10:04 pm    Post subject: Reply with quote

I had similar problems with my 1931 Austin 16/6. It turned out to be a leaking inlet manifold gasket. After I fitted new nuts and tightened them the engine returned to its normal self. It might be worth checking the inlet manifold gasket and carb. gasket.
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TTotal



Joined: 30 Aug 2008
Posts: 90
Location: Titchfield Common, Fareham

PostPosted: Mon Aug 03, 2009 7:55 pm    Post subject: Reply with quote

Thanks for all the suggestions guys!

John Smile
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baconsdozen



Joined: 03 Dec 2007
Posts: 1119
Location: Under the car.

PostPosted: Tue Aug 04, 2009 12:15 pm    Post subject: Reply with quote

If it is an air leak or partially blocked jets etc the mixture will be weak.One way to confirm it (without a colortune etc) is to whip ot the plugs and see what colour they are.Assuming they are the right ones for the engine they should be coffee brown,if they are white the mixture is probably weak,if they are black too rich or the engine is burning oil.
You can sometimes confirm manifold leaks by trickling oil round the joins,with the engine idling,if it gets sucked in and blue smoke comes out the exhaust you have found your leak.
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P3steve



Joined: 24 Nov 2007
Posts: 542
Location: Great Yarmouth, Norfolk

PostPosted: Tue Aug 04, 2009 6:19 pm    Post subject: Reply with quote

Got a Daimler V8 250 that did that turned out to be a condencer in the end though it took a long time and a long way round to get there (including a faulty coil from a well known Daimler parts supplier that just didnt work on the V8 but has done stirling service on my little Standard Ten for the last two years)
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TTotal



Joined: 30 Aug 2008
Posts: 90
Location: Titchfield Common, Fareham

PostPosted: Tue Aug 04, 2009 6:29 pm    Post subject: Reply with quote

Again - many thanks for the ideas... keep 'em coming!

Off to get married (in Dittisham The Combe House Hotel) so busy for a while, will have a play with Billy at the weekend.

Cheers

John Very Happy
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PAUL BEAUMONT



Joined: 27 Nov 2007
Posts: 1280
Location: Barnsley S. Yorks

PostPosted: Wed Aug 05, 2009 12:58 pm    Post subject: Reply with quote

Hope it went/goes well! Very Happy
PAUL
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DavidH



Joined: 14 Dec 2008
Posts: 4
Location: Sydney, Australia

PostPosted: Sat Aug 08, 2009 8:16 am    Post subject: Reply with quote

I think it sounds electrical - if ticks over OK but coughs and splutters under load I would be checking the dizzy cap, the plug leads and the timing. You say it runs OK (ish) under load but won't do more than 35 mph so clearly it is when the engine is revving that the problem occurs.
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