Fast idle when cold

[Rick Baron]

Folks,

Thanks for the great opportunity.

I have a 1979, 450 SLC, 4.5Ltr, V-8, Auto. with 98K original miles.

When the car is cold, but not necessarily cold outside, the engine will start immediately, then begin to idle @ 1500RPMS or more until it warms up.

Now, I had a 1974 SLC that I bought brand new in 1973, and I never remember having to wait while the engine warmed @ 1500RPMS

I have tried to solve this with multiple mechanics and even called Mercedes Benz in New Jersey, and the comment I got was "maybe timing?"

I do not know much about cars, but otherwise, the car runs like new.

Thanks,

RB

[jas2wa]

Hmm. I think that is totally normal. I'm trying to sort out my 71 so that it WILL do that! I think these are supposed to have an initial high idle.

[Rick Baron]

Hey thanks, but This does not seem normal.

I remember my '74 starting smoothly, watching the oil pressure guage rise, and I was off!

Now, I have to wait a considerable amount of time before the idle drops to where I can shift into Drive, without gears slamming

Thanks