On my 85 190e there is a hose that comes from under the intake and connects to the auxilary air device. This hose is pretty worn. Where does it go to under the intake? My car is not running well and so I figured replacing ALL the vacuum lines would be a good place to start (along with checking why one valve is tapping). The car idles at 1100 right now, but when I put it in gear (D or R) the rpms drop and it stalls. There is a slight miss at 2000 and not much power if I do get it into gear without stalling. Just an FYI: compression is at 152 across the board, it has new cap, rotor, plugs, timing chain, valves, guides, seals.

What part are you describing when you say "intake"? The air cleaner box, the air flow meter . . .?

The idle seems too fast, as if compensating for something.

The 190E was a pile of problems when we got it. I bled the inject lines a the fuel distributor and it helped a lot. Additionally, I did the double-dose of Techron on less than a full tank of fuel and drove it hard.

The engine ran very well after that.

Keep us posted,

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)

I did the two techrons also, no change. The hose I am referring to is under the fuel distributor. If you were to remove the auxilary air device, you would disconnect a hose on top that goes to the idle stabilzer (parallell to the valve cover) and a bottom hose that goes under the fuel distributer (intake?) towards the front of the motor.

On my 88 190e I replaced this hose, as the top one was severly dryrotted I assumed the bottom was as well. I dont know exactly what part it goes to underneath the intake assembly, but I was able to put my hand under the assembly by reaching in from the front and pulled the hose off. Same when I put the new one on. It was relatively simple. Hope this helps.

You are calling it the 'auxiliary air device' which is a Bosch designation for a part that is not used on our '91 190E. We have a rotary idle air valve instead, and I can tell you where the hoses go if that is your case too. See the pics on thread:

question @ idle air circuit 190E?

and if this looks like yours, then the hose underneath is the idle air intake hose from the lower rubber half of the airflow sensor housing. This intake is above the throttle plate housing. The outlet of the valve goes to the idle air distributor at the intake ports, and 'y's to the pcv device. See the outlet hose detail in the pic (does not show lower hose). In ours, I replaced ALL the hoses, as they had hardened and no longer sealed tightly at the plastic connectors. I also replaced the rubber housing for the same reason. Total cost at Fastlane less than $50.

If you truly have a different intake arrangement, I don't know if this is of much use.

Steve

Yes, Steve, that is the exact device I am talking about. I stand corrected in what it's proper name is. I have just emailed Phil at fastlane to help me get ALL the hoses and I am getting an OVP as well. I have nothing to lose but a $100 and some time. I am pretty confident that my drivability issue is vacuum related, but hard starting could definitely be OVP. If I can get this car to run halfway decent, I will get it to my indy shop and have them fine tune it. My wife will lke me and the car a lot better when it runs reliably.

Yes, Steve, that is the exact device I am talking about. I stand corrected in what it's proper name is. I have just emailed Phil at fastlane to help me get ALL the hoses and I am getting an OVP as well. I have nothing to lose but a $100 and some time. I am pretty confident that my drivability issue is vacuum related, but hard starting could definitely be OVP. If I can get this car to run halfway decent, I will get it to my indy shop and have them fine tune it. My wife will lke me and the car a lot better when it runs reliably.

Ok guys, thanks to Phillip at Fastlane my parts are on their way at an unbeatable price. I should have an update for everyone by this weekend. I ordered hoses and OVP. Hopefully the bulk of my issues will go away.

Ok, the parts came. I installed them. Nothing changed. I guess my testing of the old OVP was accurate.. it was OK. There are no vacuum leaks.. all hoses are new. Seems like everything is working as it is supposed to. Car is idling at 1100 - 1200. Putting car in drive or reverse drops the rpm to 750. After running for a 30 minutes, I shut the car off and it would not restart.. turned over very slow and would not fire. Guys, I hate to say this, but I am at wits end and I am seriously considering selling this car. I need a reliable comfortable car and this IS apparently NOT it. I have $3500 into this thing and it runs worse than when I got it (then it was running on 3 cylinders but atleast it would run). I give up.

Just a thought, but how old is your coil? Is it original? It almost sounds like the symptoms of a bad coil- hardly supplies enough juice at idle and when warm, is very low.

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)

Read this:

Setting new Airflow Meter - 190 16V

Check the zero position and your basic position/lambda adjustment on your air flow meter.

Also remove the plastic tapered air idle valve between the valve cover and the air filter. Clean it out with some carb cleaner. This can get gunked up and cause idle weirdness.

HTH,
Neil

I hate to admit this (although it is best), but I have given up. The car is now at a highly reccommended shop. Hopefully the repair bill will not cause a coronary. I will post the results of the shop visit.

Engine turning over slowly and not starting sounds like bad battery or connections. Your idle problems could be caused by fluctuating voltages from bad connections as the electrical load varies - the OVP does not regulate and so will not solve this problem.

Steve

Good news! The shop called and said the car is fixed - under $200. Seem as thought a couple things were out of adjustment (mixture, cam timing was off a bit, and rotary air valve was backward). I feel releived, but embarrassed that I missed these things. I will give a final report when I drive the car laet today.