c240 misfire cly 4 6 and 6
Thread Starter
Super Member
Joined: Mar 2012
Posts: 535
Likes: 13
From: Franklin, MA
2006 CLK 350/. 2009 CLK 350/2005 Both White
c240 misfire cly 4 6 and 6
So my daughter calls me stuck on the highway stalled. She was driving the CE light comes on and then no power. I limped it home rans a scan Misfire cly 4 5 and 6 any ideas where to start tomorrow? I now these cars well so I can work on it. What would cause drive side cyl all to fail?
Thread Starter
Super Member
Joined: Mar 2012
Posts: 535
Likes: 13
From: Franklin, MA
2006 CLK 350/. 2009 CLK 350/2005 Both White
I have a new update. I do have spark as far as checking the power tothe injectors im not sure. I ran scan and reset they system. Then I let the car idle only and the check engine light did not come on.
I then I hit the gas and then the CE light came on. I reset it again and hit the gas lightly and shut it of an ran the codes it said only 2 cly misfired.
So the if I don't touch the gas after a reset of the codes the car run fine . When I rev the engine it is smooth for about 8 seconds then the CE light comes on and the engine idles rough and go to crap again
So after a reset of the CE once I give it gas it goes to crap any idea CLY 4 5 6 drivers side
I then I hit the gas and then the CE light came on. I reset it again and hit the gas lightly and shut it of an ran the codes it said only 2 cly misfired.
So the if I don't touch the gas after a reset of the codes the car run fine . When I rev the engine it is smooth for about 8 seconds then the CE light comes on and the engine idles rough and go to crap again
So after a reset of the CE once I give it gas it goes to crap any idea CLY 4 5 6 drivers side
Thread Starter
Super Member
Joined: Mar 2012
Posts: 535
Likes: 13
From: Franklin, MA
2006 CLK 350/. 2009 CLK 350/2005 Both White
I checked the plugs worn but ok .No real way of check pressure . I give up I don't have the proper scan tools the can drill down pass a misfire.
SO off the mechanic 45 min away cause there is no way I'm going to the dealer.
SO off the mechanic 45 min away cause there is no way I'm going to the dealer.
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Joined: Dec 2019
Posts: 11
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05 c240 wagon
You can get a basic fuel pressure tester from a local parts store. But also, check the mass airflow sensor, see if it's dirty.
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Thread Starter
Super Member
Joined: Mar 2012
Posts: 535
Likes: 13
From: Franklin, MA
2006 CLK 350/. 2009 CLK 350/2005 Both White
Clogged catalytic converter’s
so it turns out that I had a mechanic look at it and as I thought but I didn’t wanna risk it the catalytic converter‘s are clogged on the driver side because again I had spark and I could smell fuel so any tips on catalytic converter‘s on a C240 I prefer to do this job myself because the garage wanted $1700 any help would be extremely appreciated.
So my daughter calls me stuck on the highway stalled. She was driving the CE light comes on and then no power. I limped it home rans a scan Misfire cly 4 5 and 6 any ideas where to start tomorrow? I now these cars well so I can work on it. What would cause drive side cyl all to fail?
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Thread Starter
Super Member
Joined: Mar 2012
Posts: 535
Likes: 13
From: Franklin, MA
2006 CLK 350/. 2009 CLK 350/2005 Both White
Clogged cat , I'm surprised no one here wrote that ? when you have an entire side misfires chances are somethin is blocked.
How do you know simple common sense . Run the car touch the exhaust cold side is clogged it is that easy
There are 2 cats forward and rear . I cut the pipe in half under the drivers side seat. Then I removed 2 bolts on the front cat to engine manifold.
I ran hot water threw is not clog. Then I ran a air hose out the back piece and sure enough not flow out the back BINGO rear cat clogged.
Now I ran a peace of wire to see if the front cat blew apart clogged the rear cat. The ran a coat hanger into the front cat and it did not go threw telling me the front cat seemed all there.
I bought a mini cat on amazon 40.00 that matches the old one. I then cleared the codes and reinstalled the front pipe and then preyed the rear pipe down 3 inches with a block of wood so there would be flow and I can drive the car. A bit load but at lease drivable. I paid the welder at a muffler shop 80.00 to install the rear cat and weld the cut I made to remove the front cat.
So instead of paying 1700 my 1 st quote for a mechanic I trust. I did the work my self for 120.00 . I did have to pay the 1 mechanic 240.00 for diags cause I'm an idiot and did not use common sense.
How do you know simple common sense . Run the car touch the exhaust cold side is clogged it is that easy
There are 2 cats forward and rear . I cut the pipe in half under the drivers side seat. Then I removed 2 bolts on the front cat to engine manifold.
I ran hot water threw is not clog. Then I ran a air hose out the back piece and sure enough not flow out the back BINGO rear cat clogged.
Now I ran a peace of wire to see if the front cat blew apart clogged the rear cat. The ran a coat hanger into the front cat and it did not go threw telling me the front cat seemed all there.
I bought a mini cat on amazon 40.00 that matches the old one. I then cleared the codes and reinstalled the front pipe and then preyed the rear pipe down 3 inches with a block of wood so there would be flow and I can drive the car. A bit load but at lease drivable. I paid the welder at a muffler shop 80.00 to install the rear cat and weld the cut I made to remove the front cat.
So instead of paying 1700 my 1 st quote for a mechanic I trust. I did the work my self for 120.00 . I did have to pay the 1 mechanic 240.00 for diags cause I'm an idiot and did not use common sense.
