L16 started missing at idle

[what]

Kind of misses at a idle all of a sudden. Pulls really good with out any hesitation at all. But the missing at idle drives me crazy. It doesnt idle rough its only noticable out the exhaust pipe. Could it be that my valves need adjusted. Nothing else has seemed to stop it from missing?

[metalmonkey47]

Have you cleaned the plugs?

 

Also, is it only when the engine is cold or is it when it's warm too?

[datzenmike]

Idle mixture? Has no effect above idle.

[banzai510(hainz)]

in the HOW TO section Mklotz has a adjustment of the valves section.

[what]

in the HOW TO section Mklotz has a adjustment of the valves section.

Thanks guys. Plugs look good although iam going to get new ones just to make sure. It only does it when its warm.

[SHAMUS'WAGON]

I had the same problem for years. Figured out that my cylinder 3 needs to be adjusted about every six months. I don't know if this is common for the L series, but I've gotten use to having to to it. Try tightening your manifold bolts before you do a valve adjustment though. A vacuum leak at the intake or the carburetor has caused it for me also.

[Datsun fan]

Either a vacuum leak = Perform aerosol spraying test

Or Valve adjustment = Listen carefully to your engine .

good luck .