rpm 'wanders'

[toml]

Hi Kids.
What can be the cause of a wandering idle. The motor has got 25k on a total metric rebuild and the fuel system was recently purged. There is the tiniest drip of oil coming from somewhere in the fuel injection pump (the gasket at the firewall-end of it seems a tiny bit wet), though I have no idea if that is related.

My guess would be something like air/vacuum leak? But I'm not sure. On ocasion it would drop low enough to conk out.

What could be the cause?

Thanks.

TomL, Portland, OR
1964 230SL Euro 4-speed Silver+Black w/ Red Interior
1973 280C DOHC Metalic Blue w/ Tan interior

[A Dalton]

For starters, Check CSV for leak-by and check vac line to booster for leaks..

[ja17]

Hello Tom,
Lots of tuning possibilities. Check the points first. Especially the non transistorized ignition cars like your 230SL.

Joe Alexander
Blacklick, Ohio