W124 E220 -Hesitation and Refusal to Start - Mercedes-Benz Forum
 
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post #1 of 6 (permalink) Old 07-30-2019, 11:15 AM Thread Starter
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Date registered: Feb 2019
Vehicle: w124 1993 220E - ADB1240226B970861
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W124 E220 -Hesitation and Refusal to Start

Hi all,

For the last 2/3 years i have been experiencing an intermiitent problem where the car will start up as normal but once on the road it will start to hesitate. The hesitation becomes much more pronounced once you come to a stop and try to take of again. Once switched off, the car will not start up again but it will idle for about 10 seconds and then cut off. Giving it fuel does not have any effect on the car.

This issue happens randomly at any given time whether the engine is hot or cold and can also go for months without happening again. The problem also disappears on its own sometimes after a few minutes or a few days.

The issue recently happened again but after 3 or 4 swings it started up, back-fired a bit and then idled perfectly and I was able to drove back home with no issue.

In the past the following has been checked but made no difference to the problem;

1. Fuel pressure regulator replaced;
2. Alarm and immobilizer bypassed;
3. ECU swapped;
4. ECU flush; and
5. ECU checked for faults but none found

The engine is a M111.

Thanks
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post #2 of 6 (permalink) Old 07-30-2019, 11:50 AM
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Date registered: May 2013
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Have the engine wiring harness been replaced with a good one ?

I had a similar issue, my car would misfire when i start driving, but the other time it would drive flawlessly... The culprit was a bad coil.

I suggest that you replace both coils with a working units to verify if the problem is from the coils.

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post #3 of 6 (permalink) Old 07-30-2019, 12:32 PM Thread Starter
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Date registered: Feb 2019
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Wiring harness was replaced by the previous owner, but never really had an electrical issue with this car in the 10 years or so that I have it...

Will have a look at the ignition coils

Did you ever have any issues with the camshaft position sensor?
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post #4 of 6 (permalink) Old 07-30-2019, 01:16 PM
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Quote:
Originally Posted by RavzSa View Post
Wiring harness was replaced by the previous owner, but never really had an electrical issue with this car in the 10 years or so that I have it...



Will have a look at the ignition coils



Did you ever have any issues with the camshaft position sensor?
No, haven't had any problems with the camshaft position sensor.

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post #5 of 6 (permalink) Old 07-30-2019, 02:11 PM
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When was the last time the coils (consumable items), wires and plugs were changed?

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post #6 of 6 (permalink) Old 08-01-2019, 01:48 AM
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Date registered: Oct 2006
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IF you have gauge to measure the fuel pressure at the fuel rail port, check this first.
Or you need to verify the pump's function first.

If you never change ur fuel pump or its filter, try this first.
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