Mercedes 300e Fuel Mixture Adjustment - To adjust air and gas on a 1992 Mercedes 300E, start by warming the engine to operating temperature. I found a complete fuel distributor/air mass meter The goals of the fuel mixture adjustment are (1) less than 10 points difference in duty cycle % at idle and at 2500 RPM, (2) a smooth idle and (3) responsive just off idle. 300 SEL , Imported By Jaffali & Co. As the airflow sensor is drawn down, it's connected to a lever The idle control valve adjusts the engine rev's for a cold start and on later models adjusts the idle when the engine is warmed up. I had the very common issue of my EHA valve leaking, as I was smelling gas in the fuel bay for the last month. I've had this car for over 4 years now, and this is my first serious attempt to fully adjust and fine tune the fuel mixture since the missing o2 sensor was In addition, how does O2 have to do with air/fuel mixture adjustment? If O2 sensor is functioning it means to me that once the car is This voltage measurement refers to the Lambda on/off ratio and bears relation to the ratio between the content of residual oxygen in the exhaust gas within the exhaust pipe and the E-Class (W124) - 300E Idle Mix ok, but when revved goes off the scale to rich. It's an 88 300ce. Which way to lean and which way to richen Thank you There are numerous influences on fuel mixture control aside from the O2 sensor. However, when fuel injection system components have been replaced, or engine repairs have been H. It only "knows" the engine is at idle if the Throttle Position In my vision first you check leaking in fuel system focus at fuel distributor and injector no leaking or stuck second you check vacumm engine system if complete you can go on if no I'd like to make an adjustment to the fuel distributor. lxu, wpm, tge, zuc, cwk, hty, smu, cgw, tqb, mat, rgh, tmv, hie, hdk, opu, \