1971 MGB GT - Man maths done, shocking MPG achieved - see page 38

[High Jetter]

53 minutes ago, vtec-e said:

Gunsons still make a Colortune

That's just reminded me, someone on the forum was going to send one to me ages ago - which I'd be happy to lend or pass on to @Peter C if required. Can't remember who it was though

[Dj_efk]

It sounds to me like you could do with balancing the carbs - a length of hose you can hold at at the mouth of each one with the other end stuck in your ear is all you need for this. A colour tune is  otherwise only useful if you have two - one for each pair of cylinders.

[High Jetter]

2 hours ago, Dj_efk said:

It sounds to me like you could do with balancing the carbs - a length of hose you can hold at at the mouth of each one with the other end stuck in your ear is all you need for this. A colour tune is  otherwise only useful if you have two - one for each pair of cylinders.

Colour tune is at the plug, not the carb. Yes, hose was the old trick.