OK guys, thanks for all the help so far, slowly but surely I am turning this benz into a roadworthy car.
The latest issue I am tackling is a slightly high (1100 rpm) warm idle. When I start the car it will idle right around 800 rpms. Once the engine warms up I cannot get the thing below 1100 (in neutral, its a 5spd manual so I can't tell you what it is in drive
Oil pressure and rpm gauge both fluctuate when warm, I have done some searching that led me to think it was the OVP, but after re-soldering the joints (which looked fine) and replacing the fuse the problem remains the same. Tried spraying carb cleaner around the intake and at vac connections and idle remained the same.
Unlike many other members on the board suffering from 2.3 idle issues, my car:
1. Always starts after the first few cranks fine, warm or cold
2. Never hesitates upon acceleration and has plenty of power
3. Has yet to stall out on me
A few other things that may be related, just took it for a 40 mile highway drive today, and after exiting the highway, it almost stalled, but revived it self after I gave it some gas. This is the same problem my Olds 88 had and it was corrected by replacing the Crankshaft Position Sensor, is that a part known to cause these problems on the 190?
Occasionally I smell gas while idling, like it is running rich but it always goes away when I am driving. Would a cold start injector always running cause a rich mixture at idle?
Any advice/ideas/thoughts are appreciated. I have read many different posts in this form regarding idle issues, and none seem to be quite like the one I am having. Hoping it's something simple before I go and buy a multimeter and begin testing individual components.