I've had my RST sat in the garage for the last 6 years occasionally staring her and adding some fuel. Decided to get it up and running and MOTed again as my son wants it for his school prom.

Got her started up ok, with a new battery and some fresh fuel but she’s developed a slight misfire while being stored (was running fine beforehand). Best way I can describe it as sounds like Subaru on tick over.


So far I've replaced
Plugs
Leads
Dzzy cap + Rotor arm
Fuel Filter
Checked compression (all ok)
More fresh fuel + injector cleaner additive (not really a believer of lotions and potions)
Took it for a gentle drive hoping new fuel would clear things up.
Rechecked spark plugs look like they are running lean with one even leaner.

Looking like it’s a fuel problem rather than spark.

Any suggestions I could try next before I start chucking parts and cash it it???