Idle too low

[mburman]

Ok... I need help figuring this one out... car is a '76 450SL... has a new timing chain/tensioner, warm-up regulator, plugs, wires, vacuum advance, de-catted, no EGR. I can't get it to idle above 500 rpm. If I push down on the air flow sensor plate just slightly it revs up as if it's getting more fuel than air. I've got the idle screw adjusted all the way out, timing advanced 5 degrees. I'm assuming it's getting air from somewhere other than past the air flow sensor but I can't figure out where!

HELP!!!

PS It does stall sometimes too.

Thanks!!

[4NDELIT]

Originally posted by mburman
vacuum advance, de-catted, no EGR.

I have a 450SL and was wondering how you did these... cats are obvious, but can you change advance on your own? what about EGR?

[mburman]

I didn't "change" the advance on my distributor except to adjust the timing... I changed the vacuum advance module on the side of the distributor because it was bad.