PeachParts Mercedes-Benz Forum - View Single Post - Worked on 300E, now it stalls with idle valve connected!

pawoSD · #13 12-04-2008, 11:20 PM

Ok get this, I went and started it tonight, outside temp is about 20F or so.....I cranked, and in under 2 seconds it fired off, with no throttle applied! It was running around 550rpm, but was missing a bit (shaking slightly from time to time) but evened out in maybe 30 seconds to a minute.....then ran fine. Idled at 650-700 or so, and I took it on a longer drive....ran great the whole way.....and the exhaust doesn't smell gassy like it did before.

Note: This is all now that I have Unplugged the Idle control valve!! This makes no sense! Warmed up and having been driven a while it idles around 750-800 in park/neutral with no loads on the engine. Idles around 600-650 with A/C comp or heavy electrical load (or both) And idles around 600-650 in drive or reverse. When driving it is responsive and feels perfectly normal and smooth.

How is this possible?!?

It still needs a coolant flush with MB coolant + a new thermostat.....and I might just replace the distributor cap/rotor/coil for the heck of it.