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Starting Problems 13/60 Herald Print
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sambyrd41
October 5, 2016, 9:50am Report to Moderator

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Hello,

I am having trouble getting my Triumph Herald started!  She has been sat for a couple of years in a garage and previously ran perfectly and started every time.  When I try and start, she fires briefly on turn over and for a second after but will not start.  On odd occasions the engine will run for a few seconds on 2/3 cylinders and then cut out.    

I have replaced the fuel pump, ignition coil, HT leads, Distributor Cap, Points, Condensor, Spark Plugs.  And cleaned up the jet in the CD150 carb and checked that fuel is getting to the carb.  There is a spark on all cylinders and i have checked with the rocker cover off and no valves are stuck in the head.  Also, i have tried running without the exhaust to check that it wasn't blocked and still the same problem.  I recently put the air cleaner back on, and upon starting it it ran for approx. 25 seconds firstly on 2 cylinders and then 3, with lots of smoke! Following this, it just showed the same symptoms of running briefly while turning over and then cutting out.  Another test i tried was running with just 2 plugs in, she ran for approx 25 secs before cutting out, and again when trying to repeat this it just cut out shortly after releasing the key.

As a novice with Heralds, would anyone be able to offer any potential causes of this?

Thanks

Sam
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garyf
October 5, 2016, 11:25am Report to Moderator

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Drain and re-fill with new Petrol?

It will have gone off .
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sambyrd41
October 5, 2016, 11:26am Report to Moderator

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I have tried using fresh petrol and still no difference
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Mollysdad
October 5, 2016, 11:27am Report to Moderator

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is the fuel 2 years old?
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sambyrd41
October 5, 2016, 11:33am Report to Moderator

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no i have filled the tank with fresh fuel
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Mollysdad
October 5, 2016, 11:39am Report to Moderator

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have you check the operation of the choke cable?
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sambyrd41
October 5, 2016, 11:44am Report to Moderator

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yes, the choke cable still operates as it was doing so 2 years ago
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Casper
October 5, 2016, 11:47am Report to Moderator


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Hope you don't mind me asking but with 2 years not using it, have you forgotten that you may need choke.  

Pour a little fuel directly into bores via spark plug hole, or try Bradex Easy Start..  Don't swear at it - it upsets them!

C.


Herald Anorak
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sambyrd41
October 5, 2016, 11:57am Report to Moderator

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thanks i will try that and report back
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sambyrd41
October 31, 2016, 9:33am Report to Moderator

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Still no luck on solving the problem, link below is video of issue

https://www.youtube.com/watch?v=GY3919kbpFk
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RobPearce
October 31, 2016, 10:33am Report to Moderator

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Well it certainly didn't look to be short of fuel in that brief video! It did spit back something rotten - are you sure you've got all the plug leads in the right order?


Current fleet
1967 Vitesse 2L conv "Tessa"
1970 Spitfire Mk3 (project) "Toby"
1972 GT6 Mk3
Not enough time or space
Recently sold:
1972 2.5 PI estate "Harry" (gone to russell on here)
1973 Toledo 2-door "Spike" (gone to a club official)
Used to have:
1968 Vitesse 2L saloon
1980 Dolomite 1500
1977 Dolomite 1850
1980 Dolomite Sprint
1982 TR7 DHC Sprint
1975 2500S saloon
1971 Herald 13/60 Estate (with 1500 Spit engine)
1975 Stag
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sambyrd41
November 1, 2016, 9:22am Report to Moderator

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yes i made sure when replacing to do them one by one.  after leaving it for a while it will start and run for few seconds then cut out and chuck fuel out the carb as in the video, if the leads were incorrect it wouldnt run would it?
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RobPearce
November 1, 2016, 10:24am Report to Moderator

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As you observed in your first post, it is possible to run them on two cylinders, so there are certain swapped plug lead options that will still run for a bit, until the backfire of the mis-wired cylinder throws the mixture too far off. However...

I suspect, given all the evidence including the vast quantities of fuel sploshing around, that it's flooding. After leaving it for a while it will have dried out and will start up OK, but then the petrol fills up the inlet and it coughs, splutters and kicks back.

Have you checked the float chamber needle valve? If you hand prime the fuel pump, does fuel eventually dribble out of the jet?


Current fleet
1967 Vitesse 2L conv "Tessa"
1970 Spitfire Mk3 (project) "Toby"
1972 GT6 Mk3
Not enough time or space
Recently sold:
1972 2.5 PI estate "Harry" (gone to russell on here)
1973 Toledo 2-door "Spike" (gone to a club official)
Used to have:
1968 Vitesse 2L saloon
1980 Dolomite 1500
1977 Dolomite 1850
1980 Dolomite Sprint
1982 TR7 DHC Sprint
1975 2500S saloon
1971 Herald 13/60 Estate (with 1500 Spit engine)
1975 Stag
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sambyrd41
November 1, 2016, 10:28am Report to Moderator

Posts: 9
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yes i have just put on a reconditioned carb, as i thought that may solve the problem.

i havent tried hand priming the pump, what will this show?
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RobPearce
November 1, 2016, 12:09pm Report to Moderator

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Posts: 1,762
Posts Per Day: 1.45
Where did the reconditioned carb come from? Did you follow the correct "initial setup" procedure?

The idea of hand-priming the pump is that it will allow you to observe what happens without the engine sucking air through and messing things up. If the carb is correctly built, the pump will take a few strokes (maybe a dozen) then stop presenting any resistance to the priming lever. At this point, the carb venturi should be dry.

If the pump continues to pump, and especially if you begin to see fuel in the venturi and dribbling out of the air intake, then your float valve is not closing. You need to disamantle the bottom of the carb and sort that out (adjust the float actuating tab, clean the shred of rubber out of the valve, or fix whatever other fault is behind it).


Current fleet
1967 Vitesse 2L conv "Tessa"
1970 Spitfire Mk3 (project) "Toby"
1972 GT6 Mk3
Not enough time or space
Recently sold:
1972 2.5 PI estate "Harry" (gone to russell on here)
1973 Toledo 2-door "Spike" (gone to a club official)
Used to have:
1968 Vitesse 2L saloon
1980 Dolomite 1500
1977 Dolomite 1850
1980 Dolomite Sprint
1982 TR7 DHC Sprint
1975 2500S saloon
1971 Herald 13/60 Estate (with 1500 Spit engine)
1975 Stag
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