450 sl /1973 117,768 miles
 

When I start the car she has arough and loud idle for about 6 minutes and then she smooths out. I have had the wires,cap,plugs,thermostat changed 2 months ago. I can't find any vacuum leaks. Soo I need any advise or suggestions I can get. Thanks

1973/450sl /117,768miles
 

Hi guys no one responded to my query re: rough idle for approx.
6 minutes then she smoothes out is this normal. Some help needed.thanks

What type of plugs and brand are you using? My Djet car has problems similar to yours. I have reached the point and realized that a car with 30 year old wiring, switches and sensors etc will never be perfect unless I win the lottery or I'm able to devote lots of hours to tracing stuff down. You mentioned that it was loud explain the kind of noise further.

Very likely it is moisture in the fuel injection points. This car has 2 sets of points, one for ignition in rotor cap, and another set in lower stem of distributor. An annoyance more than a problem. Common problem on all those early electronic fuel injection sets.
You can remove the distributor and clean/dry the points, but I have not tried it. Seen it done. Depends on how familiar you are with working in this area.
Gary