jrmd01,

I also have a 1986 300E and have the exact same problems you mention above except for sometimes my rpms' are showing a little higher and more so when cold. But just like you say I have found my problem to be just as intermitent.

Did you find your solution yet?

Also, what are everyone's thoughts as to the oxygen sensor or microswitch in relation to this problem?

Thanks

__________________
05 E55
03 E500