Spluttering issues!!!!!

[davesopener]

Hi,
My cars just recently started to play up when starting up .
she starts up and then even with choke full out
the revs fall untill it stalls
i have to depress gas pedal to keep revs up and stopping her stalling
after about 10/15 mins of this shes ok.
Batterys fine on testing with a multimeter tester
i guess the fuel line may be an issue on starting
[8D]
i dunno really
any ideas?
thanks
dave

[Hasbeen]

Dave, is the choke operating corectly on both carbs? Could one jet
be sticking?

Do you have the throttle adjuster, that operates on the cam, on the
choke spindle, set up properly? It should open the throttle a
little, to give higher revs, [on both carbs] when the choke is
applied.

This should do the job you are doing yourself, with the accelerator.

Hasbeen

[davesopener]

i dont know
ill work out how to check this
thankyou

however after a while reving the gas the engine ticks over with choke out say after 10 mins
ty[8D]

[davesopener]

having just fiddled around
the choke looks like its working fine
worryingly though the gasket around the rocker cover looks like
it needs replacing
a little gunge around small part of it
which was only replaced a few months ago!!
poss thermostats not working properly and cooling engine!?

feel very much the novice here!!!!!!

dave

[John Clancy]

Check the points dwell angle and the timing. Dwell should be 43% or 39 degrees. Timing should be set 10 degress before top dead centre.

If you have electronic ignition then that's another common cause for this sort of complaint but I would expect it would shut down without the throttle so probably rules that out.

Water in the fuel is another common maladie owing to the fuel filler being on top and heavy rain having a tendency to get into the tank if all is not well with the drain holes and the rubber seal on the petrol cap.

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[PeterTR7V8]

Dave

It sounds to me that the carburettor is not controlling the fuel/air mix correctly & is most likely flooding the engine. This would explain why you need to open the throttle to increase the air flow to keep up with the excess fuel & why it gets progessively worse.

The place to look first is the float chamber on the carb. This has a valve activated by the level of fuel in the chamber that shuts off the fuel supply when it decides there is enough. If that isn't working the pressure of the fuel in the chamber increases until it starts to force its way into the throttle body and override the mixture system. The most common problem is the float is full of fuel (replace) or the valve is sticking.

This is something you can do without much experience required but a manual would be a great help.

[bmcecosse]

Start off by removing the intake filter casing - and try lifting the pistons in the two carbs. these should rise quite easily (but not TOO easily) and fall back with a clunk. If not - they need ajusting to centralise the jets. Also - check there is oil in the little dashpots (under the black hex nut) - 10w40 is probably best although I use 3 in 1 because I want decent throttle response!
My engine starts in this weather with a bit of choke - and almost immediately choke is pushed in (certainly within 20 seconds) and it runs fine. It's not rich - in fact quite weak with white plugs!

[PeterTR7V8]

From the 'Physician Heal Thyself' file...

I decided to disassemble the secondary float chamber on my carb this evening and lo & behold - the float is full of fuel. This explains the occasional fuel fountain & splutter I've had for the last couple of months.

[davesopener]

hi,
not feeling too confident about taking the carbs apart and cleaning them/inspecting them!
I started her up today and no problem
strange!!!!
apart from exhaust blowing as mid box has been damaged by speed bumps
near where I live n needs rejointing!!
wierd world
ty
dave[?]

[bmcecosse]

It's simple enough to put some thin oil in the carb dashpots!

[PeterTR7V8]

Dave, all you need is

1. A Manual
2. A toolkit
3. The phone number of a guru who can bail you out when it all goes wrong.

Seriously, the best way to get confident is to DIY. You'll soon realise the mechanicals are pretty basic.

[davesopener]

ok ty[8D]