Could you pull the old module apart and attempt to repair it? I recently had one of those apart and one thing I noticed was how large and simple the internal connections are. Might it possibly be a cracked solder joint which could be simply re-soldered? Heck, I'll bet that even the little internal resistors and capacitors could be replaced, if the correct ones can be procured.

 

Module is cheap! Just replace it! The old box type are rebuildable. I'm looking for the green wire that runs from the module, connects to the distributor.

 

Where you at @Nutz 4 Benz!

 

Hey ManaBenz,

I've had this exact same issue before. I replaced

Ignition Module
Ignition Condensor Cable (Green Cable)
Dizzy
Fuel Pump Relay

It actually turned out to be a faulty fuel pump. Once I replaced that I never had the issue again. That being said, to test this, I put back the original Ignition Module and it never gave a days issue thereafter.

Link to my many month's of troubleshooting below. Maybe it will help

____
Look Here
____

 

Yes Ifraan! I remember your thread! But my green wire is bad, I can stall the car by just moving it, just trying to find a replacement!

0001596518 is the part number

 

Here it is,

But so pricy. Send me a PM with your Mobile number, let me see what I can do for you on this side of the pond if you don't come right

The Expensive Green cable

 

Thank you but I already bought that wire! It is not the same as the part number I have given. The connection for the distributed is different for 380/420 than M110. At least I got it much cheaper than the price you showed here, I paid $65! I guess I need to splice the distributor connection for my old wire onto new wire I have like the one in the link you gave.

 

Careful with the splice as that wire is super sensitive to impedance load and throw everything off.

If it goes bad I have an used spare one somewhere.

 

That’s what I’m afraid of! But what choice do I have? My ignition has a miss sometimes and everything is new except that wire. I feel the signal is being interrupted. I can’t believe no one or no where has this wire anymore, you think Classic Center would have? Isn’t there a lot of M110 around the world!

 

Gotta search the motherland for M110 bits and they’re far cheaper as well.

Zündleitung A 000 159 83 18 Mercedes Benz M 110 ignition cable | eBay

Finden Sie Top-Angebote für Zündleitung A 000 159 83 18 Mercedes Benz M 110 ignition cable bei eBay. Kostenlose Lieferung für viele Artikel!

www.ebay.de

 

Don’t know how the hell you found that Nutz but I ordered it! Maybe I was searching with no spaces with the part number?! Mahalos!

 

I’ll report back when it come and how the car behaves!

 

Well wire came and I have a new car! I found a NOS cap and rotor and installed them after I took the car for a spin with the new wire in place. Did a little adjusting to the fuel mixture, checked timing as well and holy hell this wagon is fast! No black smoke when it use to get close to red line or pinging/pre-detonation. I owe you some green bottles @Nutz 4 Benz !!!

Still have a hot start issue though, takes a bit to catch, stumbles, and gets a bit of smoke once it catches. I feel like its getting flooded a bit, need to check thermal timing switch and cold start valve. Accumulator is new as is the fuel injectors and seals.

 

Well unfortunately the car stalled out, I have no spark. Hate to think of selling this car, but its starting to become a burden. Anyway I have new ignition module, wires, coil, cap, rotor, plugs are good, and obviously the green wire from ignition module to distributor. Timing and valves checked. My friend has an '85 280TE so I had him take his ignition module off for me tp try and no spark. Haven't had time to bust out the multi meter because of the wet weather and no garage. About a month ago it started missing at stop lights with foot on the brake in drive, ran smooth at all other times, even in park/neutral. This was a symptom before all the things I've replaced and I had thought I cured it with all that I've done. Its had issues in the past with wet weather, please help!

 

Inspect the junction ( #3 on photo) for corrosion and clean up regardless to eliminate.

 

Mahalos, will report back! I really think its a grounded issue, but everything is so wet right now need to dry out!

 

Isn’t there early style OVP behind passenger kick panel on your ‘84? Are you floors ever wet after heavy rain?

If so,

Mercedes W123 Over-voltage Protection Relay and Fuse Replacement

On the 1984 & 1985 California models of the W123, and the 1985 "Federal" models, an over-voltage protection relay was added to protect other new components.

www.ifixit.com

 

Floors wet, check. Will have a look for the OVP after work, mahalos!

 

Curious, you said you replaced the coil. The replacement was the same color? If it was black originally and say you put a blue one in and ran it through the ballast resistors, you will have issues with ignition.

 

Yes same color but pretty sure the one I replaced was a replacement as it was made in Spain or Brazil. No ballast resistors on this car.

 

How about the spark plug hole drains? Are they plugged? Easy way to test is to fill each with water and see if any are slow to drain. That’ll sure make the ignition system unhappy when it’s raining heavy and you’re splashing through those wonderful Oahu streets.

 

Checked OVP, fuse is good. When you shake the OVP though it has a rattle sound, like something loose inside. Spark plug wells drain fine. Next I'll pull the coil and test.

 

This is an interesting read...

OVP Relay: what does it do, exactly?

Sorry for visiting a topic that seems to have already gotten a lot of airtime, but even after digging through many forum threads, I cannot find a definitive description on what the OVP relay does and why Benz owners are always suspecting them as THE culprit for many engine woes, and subsequently...

www.benzworld.org

 

My car has ABS for what its worth, read how cars with early ABS have OVP relay. So not sure if my OVP relay has anything to do with no spark.

 

Yeah, I have no idea what it controls on W123 gas models, just process of elimination because problem manifests in the wet.

Have you test the resistance at the connection of green wire to distributor?