I think your car has a WUR ? Maybe it's sticking a bit. I believe it has a bi-metal strip and an electrical connection. They're usually mounted on a warm part of the engine, so if the electrical portion fails, the housing will still get warm from the engine mounting, and activate the bi-metal strip. If it's running too rich at first, if will feel like it's bogging down when you get on it. As it leans out, performance improves.
Maybe check the O2 as Mitch says, they fail in the rich mode. I've found though, if they are bad, when you get on the gas, they bog down as well, as the system goes too rich. Just a shot, hope someone with more knowledge can help out. Ed 300E On 4 February 2011 09:32, Jim Cathey <j...@windwireless.net> wrote: > So I've been driving the 560 SEL lately and it seems to me that it has > one other odd behavior to go along with its variably-high and > sometimes rough idle: as it's warming up it is somewhat puny and rough > running, but as the engine temperature gauge approaches normal > operating temperature it's almost as if a switch is flipped and the > car surges forward a bit and smooths out. It's more responsive to the > throttle and stronger, you have to back off the pedal a bit. I'm not > certain, but it may be that the idle is not really that high until > then. I'm wondering if one of the engine warmup sensors is off, or if > what it's hooked to is broken or maladjusted. I should look into this > sometime. > > -- Jim > > > > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
