Spark Plug Wire & Ignition Coil
 

Hi

My car have rough vibration, I have removed the spark plug & ignition coil. How do i test their conditions?

Thanks

first of all what car and model yr are we talking about?

Previous post indicates W202 C220 1994.

The Engine is 111.961 Chasis 202.022 . Yes its C220 1994 model. I have pulled the car apart to access the Ignition Coil # 0001500480 & Its harness # 2025403809 . The harness had live wire contact due to disintegration insulation.

I want to firstly rule out the Spark Plug wire, then the ignition coils. I had already repaired the coil harness (i think? I need a detailed schematic on this) and replaced with 4 new Spark Plugs. When I put all this together yesterday, the car just shook. May be 2 coils not firing? I dont have a diagnostic tool to show, so now i have pull everything apart again, Wanting to test them individually.

The symptom now is different from before I pull apart the 1st time. Initially was no power but now there is power but it shakes violently when stationery.

The wires are solid copper core & have less than 1 OHM resistance. The ends should be marked 1K OR 2K OHMS.

i just discovered MB sold me the wrong spark plug. Its for a 1.8 litre car & not 2.2 litre. The difference is 0.8mm gap versus the correct 1.0mm gap. I think this should not effect the car shaking but only its feul effeciency right or am I wrong. Returning them tommorow & hopefully can rule this one out & concentrate on the wire & coils only.

As long as the rest of the plug specs are good - you should be able to simply regap the plugs you have.

I just use my multimeter to test the Spark plug wire & set the ohmmeter to 2000. This is the readinfg I got. Lead number 1=1, 2=1762, 3=varied & not holding, 4=1795. This seems to confirm wire number 1 & 3 must be back. I tried this several times including with the Spark Plug connected to the leads. I get simmilar results. So it seems nothing wrong with the coils. But how do i replace the copper beru wires, it look difficult to remove the rubbers surrounding the connectors.

There is a slight tear on the rubber, wondering if this is OK?

Not sure if the problem is really in the wires.
I think it is in the connectors ( shown in your right picture ).
If you want, remove the wires from the connectors & then check the resistance on each wire & each connector. ;)

Thanks.The spark plug connector can be unscrewed from the wire but how do I remove the Resistor Plug? What ohmmeter reading do I neet to set at?

Are you absolutely sure that you re-connected the wires correctly to the right coils and plugs?

OzC36

Can I ask if I use my Ohmmeter to read my 4 ignition wire plugs. Discover Number 2 & 4 have a good reading But Number 1 & 3 have no reading. My question , does that mean all 4 plugs are good?

Back to my question, is how to remove the Resistor Plug end from the Spark Plug Wire? I can remove the Suppresor end by unscrewing it.

I would recommend that you should buy a new Ignition Wire set. They wear out and this set is cheap to replace. I use these guys for parts and found that they are very efficient and ultra-reliable:

http://www.***************/search/product.aspx?sid=bvy5l0i5nqd5mr45emwrwp55&makeid=800016@Mercedes&modelid=1195422@C220&year=1994&cid= 25@Ignition%20Parts&gid=7228@Spark%20Plug%20Wire%20Set

Thanks but Autohauzaz dont ship to Australia. Do you know of another site that ship over here.

Thanks again

Oh yes they do!

I just checked on that specific part and did everything except pay for the part. They sure do ship to Australia. I have done at least 15 orders through them and I can strongly recommend them.

My bro' in law initially had the same negative auto-response from the site and then got a confirmatory email from them confirming their pleasure to ship to Australia. Try some alternatives and the site will work correctly.

They DO ship to Australia!

You mentioned live wire contact due to disintegration insulation of the coil harness. The engine wiring harness on those vehicles was a big problem and generally cant be repaired because once you start to move the wires around the insulation falls off and comes apart in places you cant even see. You may consider replacing the harness its not a terribly big job.

Thanks. I've already repaired the harness but it took much time, patience & perseverance. But I did it with new quality wires, soldering iron, quality pvc tape, pvc flexible conduit, heatshrink with internal adhesive & new MB connectors etc.

With the spark plug or Ignition Wire Set, yes confirm ********az do ship internationally. But for the US$70+, the shipping around US$90. Then they dont guarantee issues with custom or tax or add. shipping fees. On ebay they ship between US$25-$35.

There is one who invoice me via paypal for US$90, a Beru wire set. Was told beru is better than Bosch? But I enquire to them is unanswered. I need to confirm it has 4 wire set not one & that it suits my vehicle.

Any more links to that wire set suppier that ship here, will be greatly appreciated.

Unfortunately Mercedesshop dont ship here.

rmt,

Good work with your harness repair!

For your Ignition Wire Set, ******** is US71.98 for part plus US$28.00 Shipping = US$99.98 (about AU$116.00).

The parts are shipped out of USA, therefore attract NO USA taxes.

There are NO Australian import duties or taxes into Australia on parts that attract such small amounts of duty that is uneconomical for Customs to collect. So you can import perhaps $500-1000(?) value before having to pay such costs.

If you can find the correct part from a reliable seller on Ebay or elsewhere for a cheaper price, then of course, buy that one!

Go to ******** and register yourself:
http://www.***************/

Then:

1. Select your car Make and Year (Mercedes 1994)
2. Select your model (C220)
3. Select Ignition Parts
4. Select Spark Plug Wire Set (this is the part for YOUR car 202 150 0019 $71.98)
5. Select Quantity 1 and "Add to Cart"
6. Select "Proceed to Shipping Options"
7. Select "UPS Worldwide Expedited ($77.10)" or Global Express Mail ($28.00)
8. Confirm Order and Pay.

The part will arrive in 7-10 days.

PS. You can also order a bunch of other parts at the same time, and the combined shipping cost will not change much ($28-33) for the order until you reach about $200 (or you order something very large or heavy).

Thanks. I may also buy a Ignition Coil plus the Karlyn Wire set, combined shipping is US$36 but I prefer to pay via Paypal (secure) using credit car but they do not accept this?

Yes, I pay them by PayPal.

Thanks. I confirm I have ordered them via Paypal. Will it still ship in 7-10 days during this festive season? Is that business day ?

Merry X'mas & happy new year.