Hi, I've been struggling with what I think is a mixture issue on me 1995 e200. The car starts fine, and initially runs ok as the car warms up it will start to pop and cough until is stalls. If I spray some fuel straight into the air intake the car then will run OK again for a while before dyeing again, spray some more fuel again into the air intake and it runs fine again. I managed to get hold of a fuel pressure testing guage and the pressure is fine at the pumps and at the rail. I'm thinking now that there could be a problem with the throttle housing, what things can I do to check the throttle housing. I can't find any air leaks and all the hoses look OK. I've checked the engine temp sensors and they all check out, the error codes I have relate to lean mixture. The Lambda sensor is OK, fuel pressure is constant at the rail. I'm at a loss on what else to check, and find out why I get lean mixture. As anyone else had a similar problem, or had problems with the throttle housing?