Fuel .

[James 007]

My R4 1983 GTL is running lumpy ,
Should I be adding a fuel additive To help running ?
Only I haven't done this as yet and it's not happy :-/

 

[harbourseal]

Hello James,
Maybe look at timing and electrical parts first before you start puttin additives into the fuel.

What was the last time the spark plugs, cables, rotor, condenser and distributer cap were changed?

I have been running my F6 on regular unleaded fuel ever since I got her.
Regular services every year and no lumpy running.

The aluminium head is suited for the worst fuel you will be able to get.