Tb-42e lumpy under accleration

[Pezzer]

I have a slight miss whilst at tick over, when I checked the leads to the dizzy I had a weak spark at No 3 I cleaned the inside of the cap and the rotor tip now all have a strong spark. Plugs and leads are all good where should I look next? Timing is set to 10%.

[threedogs]

Is it dual fuel ???
Check under bonnet in a dark place it might look like Luna Park at night time ,sparks everywhere.
You should be able to hear them cracking as well

[Pezzer]

Yes it is dual fuel, would it be TPS I have no idea where it is located on a n Efi motor??

[taslucas]

I don't reckon a faulty TPS will give it a miss at idle. Id be looking at your leads first. Do as mentioned above; lift the bonnet and look at the leads at night (the darker the better) with the engine running. If you see any tiny sparks then it's an indication that the leads are braking down or the distributor cap is faulty

[Pezzer]

Okay I will get on it tonight, never had that suggested to me thought you were having a lend ,LOL.

[taslucas]

Lol, nah it's a good trick. I was suffering similar problems with mine so I looked at it at night and found sparks all along my leads. Leads are cheap to replace but often over looked

[Pezzer]

Okay just checked in the dark, not a random spark anywhere.

[Clunk]

lumpy on both fuels?

[Pezzer]

Slightly on gas but mainly on fuel.

[taslucas]

Does it clear out under acceleration? Ie: rev harder = misses less??

Have you got:
Good plugs?
Do the efi dissy have a rotor button? If so, is it good?
Is there any air leaks in either; between the carby and manifold, intake manifold to head, leaks in any vacuum hoses (including any lines to air con idle control etc).