Stalling Quiz: WINNER GETS $50
 

What is your best guess? Winner gets $50
Car: 1988 190E 2.3 8V
Problem: stalls at a stop or while slowing down to a stop (All random)
Parts replaced:
1. Fuel pump
2. Fuel filter
3. Fuel Pressure Regulator
4. Fuel accumulator
5. ICV
6. ICV hoses
7. Air meter rubber boot
8. Crank position sensor
9. Fuel pump relay
10. OVP
11. Temperature sensor
12. O2 sensor
13. Catalytic converter
14. Exhaust
15. Resonator
16. Spark plugs
17. Ignition wires
18. Ignition rotor
19. Ignition cap
20. Battery
21. Voltage regulator
22. Breather hose
23. Breather hose coupling
24. Fuel cap
25 EHA washers

What was done:
Adjusted EHA and Lambda
Checked fuel pressure
Checked fuel flow for each injector
Checked main fuel flow and quantity
Air plate adjusted

If your suggestion fixes the problem then you will get $50. So far this problem has lasted one year and not a single suggestion from any of the forums has provided a solution that eliminated this stalling.

Rules: You must state step by step the procedure that you would undertake. It must be replicated by an idiot like me and will not require that I end up in the hospital. In addition, replacing the whole engine or complete systems are not acceptable solutions. You must pinpoint a specific problem, support it then list and describe exactly how you would go about it.
Before I implement your solution it must be vetted. Once I agree to go with your solution there will be a testing period of two weeks before I declare you a winner.

Note: This competition is listed in several forums
I reserve the right to terminate this competition at will

Oh, I am not a troll and this is not spam!

To help you get an idea of all the details here is a thread in another forum on this problem:
http://www.benzworld.org/forums/w201-190-class/1398633-stalling-again.html

the speed sensor in the gauge cluster is loose or dead. very common on the 201s and 124s. good luck, chuck.

I had removed my cluster to fix the odometer, so I am fine with removing the cluster to check. Where would the speed sensor be? What will it look like? Why would it contribute to stalling?

The Hall effect sensor is attached to the rear of the speedo unit, left of the speedo cable connection.

I thought that the Hall effect sensor is the crank position sensor and that is attached to the EZL. I replaced the crank position sensor already.

Hall effect unit in position as per blue arrow.

http://farm2.static.flickr.com/1239/...9b697f7a_o.jpg

Heres the back of the speedo with the Hall effect doover fitted
http://farm2.static.flickr.com/1165/...213943e5_o.jpg
Have you had the air mass and the fuel distributor off and cleaned up? The air plate could be sticking.

Yes, I had those off and cleaned. I even replaced the rubber boot and adjusted the air plate with .05mm clearance all around. The fuel distributor has been tested for flow on all outlets. I also have a spare one and when installed the car still stalled randomly as it does now.
What you're describing in the photo is attached to the speedo/trip meter. I have a spare one and will compare.

So how about this little beastie?

http://farm3.static.flickr.com/2205/...880242ba_o.jpg

Yep, I checked that switch, it's fine.

I would suspect the fuel computer.

Do not want the $50, you've spend enough already.

Throttle control - always a suspect.

http://farm3.static.flickr.com/2171/...c53f0068_o.jpg

LOL, the $50 is worth the traction I get out of a post because I have posted so many times about this problem before to no avail.
I have a spare computer and that didn't make a difference. Let me tell you how seriously I am dealing with this issue: I have taken apart THREE 190Es at the junkyard for all sorts of knickknacks and I have replaced all of the strategic CIS parts as new parts.

I checked that and compared to another unit just to make sure. They both gave the same readings off line and while in the car. Statistically that means they are fine.