And yet another 210 Brain Teaser?? - Page 2 - PeachParts Mercedes-Benz Forum

JetTech · #16 02-06-2007, 11:51 AM

Quote:

Originally Posted by Hirnbeiss

I know on my M113 the access is a real pain, so getting enough force on the plug cap to snap it back on is tough.

No they weren't loose, but I'll tell you it's a pain making sure they are snapped on tight. Getting them off the plugs is no joy either...

ILUVMILS · #17 02-06-2007, 12:29 PM

I've seen a few different things knock out one bank of cylinders. The catalyst is a definite possiblity. I've seen that cause the problem many times. The engine control module can cause the same problem, but I've only done a handful of them for that particular issue. The O2 sensor could cause one bank to lean out to the point of cylinder mis-fire, but the odds are it would throw a fault code before there were any drivability issues. I've also seen water in the fuel cause this problem, but that will knock out the left bank, due to the shape of the fuel rail.

JetTech · #18 02-06-2007, 12:49 PM

Quote:

Originally Posted by ILUVMILS

I've seen a few different things knock out one bank of cylinders. The catalyst is a definite possiblity. I've seen that cause the problem many times. The engine control module can cause the same problem, but I've only done a handful of them for that particular issue. The O2 sensor could cause one bank to lean out to the point of cylinder mis-fire, but the odds are it would throw a fault code before there were any drivability issues. I've also seen water in the fuel cause this problem, but that will knock out the left bank, due to the shape of the fuel rail.

So your saying you've seen many 112 engines with a whole bank of mis-fires and all was caused by the cat? How were you able to narrow it down to the cat? Is there anyway I can do it myself aside from spending $500 for one off the net?

Johnhef · #19 02-06-2007, 03:25 PM

you can always undo the exhaust and drive it like you did and see if it happens again.

ILUVMILS · #20 02-06-2007, 05:09 PM

Johnhef has the right idea. Loosen the bolts at the exhaust manifold two or three turns each. You only want to relieve the back-pressure, not roast anything. Nearly all the clogged cat/mis-fire scenarios I've seen, occur at high RPM/engine load, so drive the car accordingly. Let us know what happens.

JetTech · #21 02-07-2007, 04:52 PM

Just a quick follow-up on this issue. Last night I swapped coils and plug wires from left to right just to exhaust all (labor only) possibilities. While I was doing that I checked all of the vacuum connections around the intake duct and throttle body. The intake duct seal was not sealing very well nor was the brake booster vacuum line that goes into the intake next to the throttle body. So today I went to the benz dealer and ordered a new intake seal, brake booster vacuum line connector, seal, and fitting. I'll be picking them up tomorrow and installing everything on Friday. Another thing I picked up yesterday was a code reader so I could read and clear my own codes. I've got a feeling that little thing will come in handy with not only this problem but others that are lurking and waiting to spring on me in the future....

Stay tuned and I REALLY appreciate all of the replies. The knowledge on this forum is absolutely priceless!!!

Dale

Ocean View · #22 02-07-2007, 05:16 PM

Quote:

Originally Posted by JetTech

Just a quick follow-up on this issue. Last night I swapped coils and plug wires from left to right just to exhaust all (labor only) possibilities. While I was doing that I checked all of the vacuum connections around the intake duct and throttle body. The intake duct seal was not sealing very well nor was the brake booster vacuum line that goes into the intake next to the throttle body. So today I went to the benz dealer and ordered a new intake seal, brake booster vacuum line connector, seal, and fitting. I'll be picking them up tomorrow and installing everything on Friday. Another thing I picked up yesterday was a code reader so I could read and clear my own codes. I've got a feeling that little thing will come in handy with not only this problem but others that are lurking and waiting to spring on me in the future....

Stay tuned and I REALLY appreciate all of the replies. The knowledge on this forum is absolutely priceless!!!

Dale

So did you floor it again to see if it was one of the coils?

I had a similar problem on my W210 with the M104 engine and it turned out to be the coils.

JetTech · #23 02-24-2007, 01:08 PM

Here's the final follow-up on the right bank mis-fire issue. I ordered an aftermarket cat system for the right bank and had it installed today. Thankfully that was the problem because all is well now with no codes. What a relief!!! Many thanks to all of you that pointed me in the right direction as to the possibility of the primary cat going bad!! I couldn't have done it without your help and direction, I can't say thanks enough!!!

When they removed it and turned it upside down chunks of the catalyst came falling out of it so there was no question that was the problem. I'm going to give the left side a little time but will put it on my agenda to have it replaced as well.

Also some of you may remember a few of my first posts right after I bought the car saying it felt a little "soft" on acceleration when comparing it to the 95 E320 that I used to own, well that "softness" is definitely gone!!! She makes a screaming run to redline now with power to spare, no more softness on acceleration!!!

Again, I don't want to repeat myself too many times but, a huge thank you to everyone who led me to the problem and the fix!!! My hat is off to you all!!

Dale

Hatterasguy · #24 02-24-2007, 01:46 PM

Glad you fixed it! But doesn't MB cover the cats under an 8 year warranty? Somone I know with an S430 had there's replaced last year and I thought it was under that warranty.

JetTech · #25 02-24-2007, 02:38 PM

I'm not aware of the 8 year warranty but do remember it being 80K miles, and I have 99K+ on ours.

manny · #26 02-24-2007, 06:55 PM

Dale,

Manufacturers emissions control warranty is 8 years, 100 k miles.
This has been Law for a few years.
There are " Escape Clauses " that some mfg's use sometimes, to waesel out of a warranty claim.
I'd go ahead & give it a shot with M-B.

Hatterasguy · #27 02-24-2007, 11:09 PM

Yeah I thought it was 8/100. The S430 in queston is a 2000 and this happened in 06, so it was 6 years about 40k-50k miles at the time. The egr failed or something like that causing it to run rich back from VT and it blew the cats as a result.

His mechanic brought it to the dealer, and from the way he made it sound the dealer never batted an eye. Just did the warranty work, it gets charged back to MB anyway dealers love that stuff.

JetTech · #28 02-25-2007, 10:14 AM

I just did some research and all I could find was an 8 year/80K mile exhaust warranty, whichever comes first. I can't find the 100K mile warranty anywhere Manny, even in my owners manual....????? I'm a little confused on this one.

manny · #29 02-25-2007, 11:08 AM

Dale,

My bad.
After reading the " fine print " in my owners manual, I noticed the emission controls warranty is in fact 8 years, 80 k miles, including the Catalytic converter(s).
At least this applies to my 2007 car, sold & operated in Canada.
How much was your replacement?

JetTech · #30 02-25-2007, 11:24 AM

I bought an aluminized aftermarket replacement from a place in CA. that was a direct bolt in. It was $355 which was several hundred less than anything else I could find. It is aluminized and not stainless which I'm sure accounts for a lot of the savings. If I lived in salt country I don't think I would have gone with it but here in GA salt isn't used. Quite honestly I didn't want a factory replacement anyhow seeing as what my current one did. I'm hoping with this aftermarket unit I'll never have to be concerned with it again.