atai888

Hi Guys,
I need some help!!
I just tried to search the forum but came up with nothing similar to the symptoms of my car...

Here's what's going on:

Yesterday when I started driving my car- I noticed a strange low rumble/roar from my engine when i gassed past 3,000rpms... I thought it was strange and possible thought I needed an oil change so I went to make time to add some oil today first before doing a full oil change this weekend when I had more time...

As I was leaving for lunch today from work I started noticing the strange rumble again... Then in the next couple seconds my "Check Engine" light started flashing and my engine started to lose power (rpms wanted to drop on it's own)... when I came to a stop light and gassed again... My engine was very weak and rpms were not rising as usual... I pulled over at a gas station and added 2 containers of engine oil to see if that's the problem.... I got on the fwy and the problem occurs again. I stop at a Chevron Oil Stop check station and they helped me run a free "Engine check" diagnostics and reported that I had 6 random engine misfirings which they claim to be a "spark plug" problem.

Has anybody else had this issue and can confirm these findings? I hate to bring to the stealership to get a diagnosis...

I have approximately 60k miles on my engine and I don't believe the sparkplugs ever been changed...

Any input would be greatly appreciated!

Thank you!

e1000

#1. Was the engine oil 2 quarts low or did you just start pouring? Your car has a dip-stick, go check if it's over the max line.

#2. Plugs are "supposed" to last 100K on these cars. With that said:

#3. We need more info. What exactly are the misfire codes and are they all on the same cyl or on different ones? Also, does your engine shake excessively when it does this or no? If you re-start your car and it's back to normal, does the CEL remain or does it go away?

atai888

Thanks for your quick reply!

#1 - I checked my dipstick and it was way under...
#2 - I was also told the plugs are "supposed" to last 100k miles... However I do do heavy/hard driving...
#3 - Yes when this happens my engine does seem to shake and when I re-start my car the Check Engine Light still stays... But normal driving can presume as long as I stay under 3,000rpms.

I checked with my mechanic friend and he says on these cars it's most likely coilspark problem? Does this sound accurate?

Thanks for your feedback!

e1000

Still hard for me to tell exactly what it is. I have had a coilpack go bad however. The big thing is if the misfire is jumping from cyl to cyl then it's probably not a coilpack. If the misfires are on a single cylinder then i would say it could be a coil pack or a single bad plug.

You need to find out what cylinders were throwing the codes.

Norwichdelta06

check engine light flashes for a reason. Means something bad is happening. When a check engine light flashes it's because there is a misfire and whenever there is a misfire something gets cooked real fast either the CAT, or some O2 sensor evetually if it not's taken care of ASAP

samaritrey

ok i would say that i doubt 6 coil packs or spark plugs are causing problems so close together. get proper codes and don't drive it until you fix it.
on a side note what about a clogged fuel filter that would limit gas and cause problems don't know what codes would pop though.

Norwichdelta06

6 random misfires though? Have you had anything done to the car? Usuaully when there are random misfires it's because the timing is off or there is a huge vacuum leak somewhere. You might have to bring it to the dealer to figure out what the front and rear banks are telling u.

Tiktokxo

What was the outcome of this issue? I experienced the same exact issue on my 2006 c230. Six Codes from autozone indicate camshaft sensor, crankshaft, and ignition coil x2 each. Light blinked but has since gone away.

mercedes4ever

Check timing chain & balance shaft issues.

SpikeC230

Check fuel filter. Mine did similar put new fuel filter on and was good as new.

Michael_dav

changing fuel filter fixed this problem so easily ?

I have got the same problem

ncmudbug

We're all flying blind here without knowing the codes that were thrown. The next thing you need to do is find out what the car is trying to tell you by getting. those codes.

If you are getting P0016 with P0017 together, you might be having the balance shaft sprocket problem. A good indy or a dealer should be able to check that. Given that you were running low on oil, it sounds like your car was not regularly maintained by the dealer which means that if that is the problem, they will probably not be very "helpful" (in defraying the cost of the repair).

In any case, there isn't much anybody can do without knowing what codes are being generated.

Aside from your drivability issue, the thing you MUST do is keep oil in the engine and that oil should be from the MB approved list. If you poured "two containers" of the wrong oil in the engine (and since you didn't mention what oil you used, I assume that it is the wrong oil), I would change the oil and filter at the next opportunity.

Michael_dav

It's not about oil, it's about Fuel filter, spark plug or spark plug wire, it's just to hard to find which of these

ncmudbug

Just to be clear, I didn't say it was. but if he doesn't take care to keep the oil topped up and use the right kind, his next problem might be.

Michael_dav

Diagnostics showed that my car has got problem on second cylinder i have changed second cylinder ignition coil with first cylinder ignition coil, after check engine light was i went to diagnostics again, now it showed that problem comes from Cylinder number 1, it means that ignition coil is dead and i have to change it, do i have to change spark plug by the way?

ncmudbug

No. Changing the coil pack does not require changing the spark plug.

Michael_dav

ok thank you

Holmes5518

Also, it's probably just the wires, which are much cheaper than a coil. Unless you swapped coil only and left wires where they were?