190E firing order question
 

hello,

I have a 1986 190E 2.3 that I am working on, but I don't know if it's a 16V or not. I bought a distributor cap and rotor for it assuming it was a 16V. When I removed the old distributor cap the fastener was different. The old cap had a hook type hold down. The cap I bought had actual screws to ahod it down. I figure that this engine I am working on is not a 16V.

The car sounded like it was missing at idle so I decided to replace the plugs (bosch super H8DC) and to check the cap and rotor. I also checked the wires and they all tested around 1.1K ohms. I did notice as I was pulling the wires and testing them that they were in the wrong order. The plastic tunnel that the wires go thru indicate the firing order is 1-3-4-2 (2 being the front of the car closest to the radiator fan.) When I tested the wires, 1 and 4 were interchanged. I figured that was the cause of the misfire/stumbling at idle. I have the service manual for the engine and it indicates that the firing order is 1-3-4-2 with 1 being closest to the radiator fan.

Now the car won't start. I tried both ways. What is the correct sequence to this? Engine number is 102985-12-027203

any help would be appreciated. Thank in advance

Nolan

The engine you are working on is a 8V motor. & the correct cap should be MB 000-158-43-02.
The firing order is 1-3-4-2 & the cap should be marked. 1 is closest to the front of the engine.

-- Comment irrelevant after previous post was edited --

Sixto
91 300SE
81 300SD

1-4-3-2 didn't work
 

MB Doc,

1-4-3-2 didn't work....I got nasty popping sounds when cranking. I didn't manage to get the corrent cap and rotor yet ( have to exchange the ones I bought).

I tried the 1-3-4-2 as per the book and it started up but ran rough for about 5 min then cleared up. I think it could run a little smoother after the cap and rotor are replaced.

Thanks for the replies.

Nolan

OOPS 1-3-4-2 is correct! Brain Fade.

M.B.DOC

No reason to apologize. Didn't you say 1-3-4-2 in your first post?

I believe mb doc edited his original reply to reflect the correct firing order.

Didn't know that could be done. Wish I could take back some things that I have said and change them!:D