93 W124 E200 no spark - Mercedes-Benz Forum
 
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post #1 of 9 (permalink) Old 06-18-2019, 05:20 AM Thread Starter
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Date registered: Jun 2019
Vehicle: 1993 W124 Mercedes-Benz E200
Location: Sweden
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Exclamation 93 W124 E200 no spark

Hello BenzWorld!

I have a 93 W124 E200 with 16000km that I've been trying to get back to life after 17 years in storage. My Dad bought the car in Germany 2000 and brought it back to Sweden the same year and drove it for 2 years. The car started to misfire and only ran on 2 cylinders until it suddenly would not start at all. My dad tried to solve the problem and was told that the ecu unit was faulty and had to be replaced. At the time the unit was to expensive so my dad decided to put the car in storage and wait for a cheaper unit. In 2014 my dad got hold of a used unit with new software for the car. But never had the time to test the unit in the car since it needed serious maintenance.

2 weeks back I started working on the car and this is what I've done so far:

Drained the fuel tank
Drained the fuel lines
New gas
New fuel filter
New fuel pump
New oil and filter
New battery
New spark plugs
New air filter
(Cleaning, lubricating and alot more).

A compression test showed that the engine M111.940 is in good condition and the engine also gets fuel. The car cranks but give no spark at all.

Moving over to the ignition I have replaced so far:

Spark plugs
Ignition coil packs
ECU Unit

I have tested:

No spark at all with spark plug tester on all cylinders
Ignition cables reads 2k ohms
Ignition coils reads 6k ohms on the top
CPS - Crank shaft position sensor reads 800 ohms
OVP relay with fuse checks out and works like it supposed to
Checked over the fuse box (have I missed something)?

What's left:
Wiring harness
If the ECU Unit gets power
If the ECU Unit delivers power to the ignition coil

I would like help explaining how to do this properly or direction to an article or video. Or if I have missed anything.

Original ECU Unit:

012 545 53 32 Bosch 0 261 200 602

Replacement ECU Unit:

015 545 72 32 Siemens 5WK9 112

Message from the company we bought the unit from:

It has been programmed to function without any problems on Mercedes E200 W124 cars. This one was tested on 2 different cars, which originally had an ecu with the number 0125455232 installed and everything was OK.

It has exactly the same size and hardware as the other one. With the new software in it, it's 100% similar with the one with the number 0125455332! All Original Mercedes - Hardware and Software!

Please follow the steps by fitting the PMS:

1. Switch of the car battery for 10 minutes (take the "-" cleat away and put it back).
2. Turn the key on position "switch ignition on" and wait for another 2 minutes before starting the engine.
3. Start the engine without pushing the gas pedal, it's very important to not push the gas pedal!

------------------------------------------------------------------------------------

All help will be deeply appreciated and the car shall rise from the dead.

Thanks you all for reading, have a great day.
Granhage
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post #2 of 9 (permalink) Old 06-18-2019, 05:32 AM
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Vehicle: 86 190E 2.3L 16V, 2 95 320TE's, 02 S500
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Try swapping the EZL (ignition control unit)

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post #3 of 9 (permalink) Old 06-19-2019, 07:35 AM Thread Starter
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Originally Posted by Jayare View Post
Try swapping the EZL (ignition control unit)

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Thanks for the reply Jayare! Bought a new unit yesterday so it will probably show up next week. It's the same ECU Unit that originally was installed in the car. I'll get back to the tread with an update after testing the unit.
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post #4 of 9 (permalink) Old 06-19-2019, 08:29 AM
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The ECU and EZL are different parts. the EZL is mounted to the inner fender, left side. The crank position sensor plugs into it.

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post #5 of 9 (permalink) Old 06-19-2019, 10:46 AM
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Date registered: Feb 2009
Vehicle: 1995 e320ce. 1993 230 TE. 1987 Kit car with 260e running gear.
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Does it have an ELZ Jayre?
Is it not just a cut down m104?
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post #6 of 9 (permalink) Old 06-19-2019, 10:53 AM
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Is your wiring harness insulation crumbling?
My 95 had virtually nothing left on the wiring going to the coil packs (m104, 3 coils).
There was particular years when the harness insulation was bio degradable and of course causes all sorts of problems that cannot be solved with normally applied logic.
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post #7 of 9 (permalink) Old 06-19-2019, 03:31 PM Thread Starter
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Originally Posted by Jayare View Post
The ECU and EZL are different parts. the EZL is mounted to the inner fender, left side. The crank position sensor plugs into it.

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I must have confused the terms of the Ignition control unit. The PMS unit is the one that has been ordered. The picture is not of the actual ordered part it's just to demonstrate.
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post #8 of 9 (permalink) Old 06-19-2019, 03:43 PM Thread Starter
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Quote:
Originally Posted by boyd waugh View Post
Is your wiring harness insulation crumbling?
My 95 had virtually nothing left on the wiring going to the coil packs (m104, 3 coils).
There was particular years when the harness insulation was bio degradable and of course causes all sorts of problems that cannot be solved with normally applied logic.
Thanks for the response. The wiring harness insulation seems to be in good condition opon visual inspection (no crumbling or cracks). But if the problem persists after installment of the new ignition control unit the next step will be to check over the wiring completely again.
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post #9 of 9 (permalink) Old 06-27-2019, 04:40 AM Thread Starter
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The car started after installing the new EZL unit! I will continue to work on the car to get it safely back on the road again.

Thanks again for the help!

Granhage
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