Running problems

when checking compression from cold put a spoon full of engine oil down the bores (not wd 40) before cranking. also it may be the heads not sealing. 

Cheers bar. I'll do that tomorrow.

or the ht leads

I've ordered some yellow ones.

fuck me yellow ones aint going to work i fuckin give up trying to help you people , you need green ones fffffs

compression no better with oil  

does this look dodgy??



reckon it might be running a bit rich  

Cant see in the photo .You should be able to see tell tale signs if its been blowing past with sooty marks. what are the bores like?

just had another look what is all that staining around the right hand chamber?.

As the heads are off now I'd clean all that shit off them and check for cracks, lap the valves in again, lap the barrels to the heads, check the rings and put it back together. That way you know it ain't compression.

Like the rev said - do the basics. You need 3 things - fuel, compression, ignition. Sorry if it sounds like teaching nan to suck eggs.

Oh and get green HT leads like Toast said. Yellow ones don't work  

cheers dudes. I'll get right on it.  

oilyT wrote:what is all that staining around the right hand chamber?.

oil?

ok. 3/4 head has cylinder spacers. 1/2 head doesn't?? do i refit them?

valves ground in, barrels lapped, all boxed back up, tappets done, compressions good, new ht leads.

starts beautifully  





drives the same  

paddy wrote:Like the rev said - do the basics. You need 3 things - fuel, compression, ignition.

must be fuel then.


I've already blown out all the jets. Fitted new manifold gaskets..

i shall invest in some carb overhaul kits.

any other ideas??

I was just typeing fuel !!!


When the oval was running like that I changed the carb !
Put twin webers on ran great !


Apparently the carb I had on it was leaking air thro some seals !

Other than that mate I haven't a clue

mmmmmmmmm twin webers



machine 7 £473.49  

Well at least you know you've got a good base to work from. i would also check the dizzy for wear if the shaft is worn it would alter the points gap. 

oooh yeah. I'll check that first..

substandard wrote:oooh yeah. I'll check that first..  

 

I'd be inclined to go through the ignition system again as Bary says. Do you have another 'known good' dizzy, coil and condensor to swap onto it just for a test?

I'd also pull all the plugs out, earth each one out against the block in turn and spin the engine over to check for a weak spark. This is also a good test to see if any of the leads are shit - if you get a belt off any of them then swap it for another one. Doesn't have to be a new one.

yeah i could swap stuff over from the bus... I'll get on it...

Swap the engine , that will sort it

yeah that would do it  

right, swapped electronic dizzy, leads and coil. Runs soooo much better! but it's still missing when driving  

dizzy made the biggest difference.

nearly there I reckon though

Clutching at straws....
Is the gearbox earth strap good ?

Ooooh that's a good one. I've not checked that. Cheers dude.

I really want to thank all you guys for all this assistance. I like to think I can sort pretty much everything on my assorted classic vehicles, but this is really driving me nuts!!!  

Glad I could help !!