Anyone in Northern Virginia good with Mechanical Fuel Injetion?

[mamali]

My 280Se is running rich. Can anyone help me out in diagnosing and fixing her? She will get a lot more use when fixed. I live in Centreville. She runs rich (white smoke when cold). When she warms up much better. Thanks

[Benz Dr.]

Sounds like the warm up device on top of the IP is stuck. There's a sliding valve under the thermostat and they often stick due to a bit of coolant leaking in to the chamber. Pull the thermostat housing off and see if the slide valve moves up and down freely. If not, free it up and put a bit of grease in the housing to keep it from sticking. Use a bit of sealer under the thermostat housing before replacing.

Also, check to see if the thermostat housing is getting hot while running. I've seen this area get plugged up and the engine will run very rich. You may need a new thermostat if all else fails. Check the cold start valve for leaking while you're at it.

[JMURiz]

Give a call to Norbert Lamp at HBL Mercedes of Tysons.
Make sure you talk with him, he's been working on Mercedes since the 60's and was trained at Mercedes in Germany.

[mamali]

Originally Posted by Benz Dr.

Sounds like the warm up device on top of the IP is stuck. There's a sliding valve under the thermostat and they often stick due to a bit of coolant leaking in to the chamber. Pull the thermostat housing off and see if the slide valve moves up and down freely. If not, free it up and put a bit of grease in the housing to keep it from sticking. Use a bit of sealer under the thermostat housing before replacing.

Also, check to see if the thermostat housing is getting hot while running. I've seen this area get plugged up and the engine will run very rich. You may need a new thermostat if all else fails. Check the cold start valve for leaking while you're at it.

I removed the thermostat and made sure it moves. Greased it and put it back Still the housing i not getting that hot. A new thermostat will be on order soon. The other thing is the idle speed does nochange when engine is hot or cold?

[mamali]

Originally Posted by JMURiz

Give a call to Norbert Lamp at HBL Mercedes of Tysons.
Make sure you talk with him, he's been working on Mercedes since the 60's and was trained at Mercedes in Germany.

Has anyone used Norbert and know what he charges? Thanks

[Renntag]

It was suggested that you call him. start with that. Norbert might be able to tell you what he charges......if you call him.