Stalling Quiz: WINNER GETS $50 - Mercedes-Benz Forum

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post #1 of 79 (permalink) Old 06-06-2009, 07:17 PM Thread Starter
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Exclamation 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

Last edited by DP; 06-06-2009 at 07:24 PM.
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post #2 of 79 (permalink) Old 06-06-2009, 07:33 PM
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post #3 of 79 (permalink) Old 06-06-2009, 07:34 PM Thread Starter
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Originally Posted by Nutz 4 Benz View Post
"It's your alternator"
Support this theory
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post #4 of 79 (permalink) Old 06-06-2009, 07:51 PM
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That's a lot of replaced parts. Are you just throwing parts at it at random?

The problem as I see it is most likely in the idle circuit, and something is deliberately triggering the fuel pump relay to shut down the fuel pump as the RPMs drop too far. Do you see a steep drop in RPMs just before the car stalls?
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post #5 of 79 (permalink) Old 06-06-2009, 07:52 PM
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There is a nut loose behind the wheel
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post #6 of 79 (permalink) Old 06-06-2009, 07:52 PM
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"It's your alternator"
No, I am sure it is caused by the radio antenna being too short.
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post #7 of 79 (permalink) Old 06-06-2009, 07:56 PM Thread Starter
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Quote:
Originally Posted by p100 View Post
That's a lot of replaced parts. Are you just throwing parts at it at random?

The problem as I see it is most likely in the idle circuit, and something is deliberately triggering the fuel pump relay to shut down the fuel pump as the RPMs drop too far. Do you see a steep drop in RPMs just before the car stalls?
Random? I am just going by the suggestions of all of our members
http://www.benzworld.org/forums/w201...ing-again.html

It does do that sometimes where the rpm drops a little and sometimes surges back before going to zero, the fuel pressure drops then boom it stalls. Today for example it was nice and steady then it went to zero just like that. There is no set pattern here.
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post #8 of 79 (permalink) Old 06-06-2009, 07:57 PM Thread Starter
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There is a nut loose behind the wheel
Which one?
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post #9 of 79 (permalink) Old 06-06-2009, 07:58 PM
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Originally Posted by yoseyman View Post
There is a nut loose behind the wheel
Pearls of wisdom.

Good to "see" you.

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post #10 of 79 (permalink) Old 06-06-2009, 07:59 PM
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Which one?
I would consult grasshopper but....
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