Down shift, check engine light, V8 grumble, power loss, and a burning smell. (20 sec)
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
I know absolutely nothing about GP Sorensen injectors other than the fact that Autozone carry them. They are very cheap - who knows?? I was looking at the cheaper alternative at RMEuropean
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From: Orlando, FL
C240
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Yeah! & I'm sure Autozone will give you some kind of warranty on them if you get a bad one.
For 30 bucks if you get 5 or 6 years out of the non genuine part you have done well.
Sometimes you just pay a hell of a lot for the name. As long as they give you a direct equivalent for the car which I see they have on their website although they show the wrong picture.
For 30 bucks if you get 5 or 6 years out of the non genuine part you have done well.
Sometimes you just pay a hell of a lot for the name. As long as they give you a direct equivalent for the car which I see they have on their website although they show the wrong picture.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Well - I've been thinking hard about this. If it's not the injector - we are fast running out of options. I can't see how the MAF can give you a consistent misfire on one cylinder only. It can give you random misfires. The same would be likely with an ECU problem. It's not the cam sensors - You've done the CPS - We have not done a fuel rail pressure test but the fuel pump seems to keep up with all the other injectors flat out. Something is right on the edge or you would not have got 400 troublefree miles after the fuel filter change - cleaning that injector & replacing the filter seemed to tip it over to the right side for a while. You have checked for air leaks & you don't get a fuel trim code. We've done the coilpack, wires & plugs check.
I suppose it could be a glitch in the engine wiring harness or a bad connector somewhere - but I would expect this to give random trouble not only at full load peak RPM. I would also expect it to throw up trouble codes & it is not!!!! In fact I would expect most of the other possibilities to throw codes & they are not.
I guess all we can do is wait & see. I really want this to work for you so that you can enjoy your car!
I thought that KrisV420's car was a pain to sort out & we got that right but yours has been far more difficult with a complete lack of trouble codes apart from the misfire. I don't think we have wasted your money yet. The items we have serviced so far generally needed to be done at your mileage anyway. 
I suppose it could be a glitch in the engine wiring harness or a bad connector somewhere - but I would expect this to give random trouble not only at full load peak RPM. I would also expect it to throw up trouble codes & it is not!!!! In fact I would expect most of the other possibilities to throw codes & they are not.
I guess all we can do is wait & see. I really want this to work for you so that you can enjoy your car!
I thought that KrisV420's car was a pain to sort out & we got that right but yours has been far more difficult with a complete lack of trouble codes apart from the misfire. I don't think we have wasted your money yet. The items we have serviced so far generally needed to be done at your mileage anyway.
Last edited by Glyn M Ruck; Aug 6, 2010 at 08:59 AM.
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From: Orlando, FL
C240
Well - I've been thinking hard about this. If it's not the injector - we are fast running out of options. I can't see how the MAF can give you a consistent misfire on one cylinder only. It can give you random misfires. The same would be likely with an ECU problem. It's not the cam sensors - You've done the CPS - We have not done a fuel rail pressure test but the fuel pump seems to keep up with all the other injectors flat out. Something is right on the edge or you would not have got 400 troublefree miles after the fuel filter change - cleaning that injector & replacing the filter seemed to tip it over to the right side for a while. You have checked for air leaks & you don't get a fuel trim code.
I suppose it could be a glitch in the engine wiring harness or a bad connector somewhere - but I would expect this to give random trouble not only at full load peak RPM. I would also expect it to throw up trouble codes & it is not!!!!
I guess all we can do is wait & see. I really want this to work for you so that you can enjoy your car!
I suppose it could be a glitch in the engine wiring harness or a bad connector somewhere - but I would expect this to give random trouble not only at full load peak RPM. I would also expect it to throw up trouble codes & it is not!!!!
I guess all we can do is wait & see. I really want this to work for you so that you can enjoy your car!
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Thread Starter
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Joined: Aug 2009
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From: Orlando, FL
C240
First and foremost, GP Sorensen is not a direct fit, but I made it work. The retaining clip is of not big use, which could not be used on the GP injector because of a different, but functional, o-ring set up.
Secondly, the misfires are still happening. I have just about given up.
Things replaced/tested/done to rid of Cylinder 4 Misfire:
All plugs.
Swapped coil packs.
New plug wires.
Air filters.
Cleaned MAF
Compression tested.
Injector for cylinder 4.
Changed fuel filter.
2x tanks of techron treated fuel.
Resealed both gasket covers and replaced driver side breather hoses. (Stopped oil from misting onto the coil packs.)
I've spent too much to carmax this car, and I wouldn't have the heart to do it, either. I don't know where to go from here!
Secondly, the misfires are still happening. I have just about given up.
Things replaced/tested/done to rid of Cylinder 4 Misfire:
All plugs.
Swapped coil packs.
New plug wires.
Air filters.
Cleaned MAF
Compression tested.
Injector for cylinder 4.
Changed fuel filter.
2x tanks of techron treated fuel.
Resealed both gasket covers and replaced driver side breather hoses. (Stopped oil from misting onto the coil packs.)
I've spent too much to carmax this car, and I wouldn't have the heart to do it, either. I don't know where to go from here!
Last edited by laneshift; Aug 6, 2010 at 08:33 PM.
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From: Diamond Bar, CA
W206 PHEV AMG
As I've posted before - In civilised parts of the globe the C240 was considered pick of the bunch with the C270CDI diesel. Certainly no weak link. It is no mystery as to why Benz don't offer the I4 W204 models in the US - V6 rules.
Lane - read this - refer to it often when nonesense is spoken. The European motoring scribes agree with you & I. Enjoy your car. The C240 was extremely popular in Asia as well - That's not surprising from the oldest civilisation on the planet!
https://mbworld.org/forums/attachmen...ws-c-class.pdf
Lane - read this - refer to it often when nonesense is spoken. The European motoring scribes agree with you & I. Enjoy your car. The C240 was extremely popular in Asia as well - That's not surprising from the oldest civilisation on the planet!
https://mbworld.org/forums/attachmen...ws-c-class.pdf
back to topic, so the injector on the #4 was the culprit after all.
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2019 G70 6MT & 2022 Ford Maverick XL
It might be time for a dealership to figure it out. You seem to have done everything that you can. I really hope you get this worked out and I am anxious to see what it turns out to be.
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From: Diamond Bar, CA
W206 PHEV AMG
First and foremost, GP Sorensen is not a direct fit, but I made it work. The retaining clip is of not big use, which could not be used on the GP injector because of a different, but functional, o-ring set up.
Secondly, the misfires are still happening. I have just about given up.
Things replaced/tested/done to rid of Cylinder 4 Misfire:
All plugs.
Swapped coil packs.
New plug wires.
Air filters.
Cleaned MAF
Compression tested.
Injector for cylinder 4.
Changed fuel filter.
2x tanks of techron treated fuel.
Resealed both gasket covers and replaced driver side breather hoses. (Stopped oil from misting onto the coil packs.)
I've spent too much to carmax this car, and I wouldn't have the heart to do it, either. I don't know where to go from here!
Secondly, the misfires are still happening. I have just about given up.
Things replaced/tested/done to rid of Cylinder 4 Misfire:
All plugs.
Swapped coil packs.
New plug wires.
Air filters.
Cleaned MAF
Compression tested.
Injector for cylinder 4.
Changed fuel filter.
2x tanks of techron treated fuel.
Resealed both gasket covers and replaced driver side breather hoses. (Stopped oil from misting onto the coil packs.)
I've spent too much to carmax this car, and I wouldn't have the heart to do it, either. I don't know where to go from here!
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Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
ok...in all seriousness, i just read your last report on what you have replaced and read that the misfire code comes up when you are on full load? if I read that correctly...
WITH all the parts replaced, the only cause for the misfire would be not enough fuel (running lean) which causes the ECU to shut that cylinder down to prevent detonation OR not enough air causing too rich of a mixture which would also causes the ECU to bring the misfire code and shut the injector down to prevent flooding the cylinder.
now, since you did replace all the parts with new parts, so I can safely assume that everything should be working properly and as it should. It leads me to believe that a ECU glitch is causing this problem for you. It is uncommon, but when I had my cam replaced last summer this was brought up by my tech that they have seen few cases of ECU causing misfires and when they replaced the ECU everything went back to normal.
ECU would be of course expensive. What I would do before you decide to buy a new ECU is check for ALL the connectors going to the ECU to make sure all the pins are properly connected and none of them are bent or broken AND have someone with STAR reflash the ECU to it's original state and see if that will still bring you the misfire code on full load.
WITH all the parts replaced, the only cause for the misfire would be not enough fuel (running lean) which causes the ECU to shut that cylinder down to prevent detonation OR not enough air causing too rich of a mixture which would also causes the ECU to bring the misfire code and shut the injector down to prevent flooding the cylinder.
now, since you did replace all the parts with new parts, so I can safely assume that everything should be working properly and as it should. It leads me to believe that a ECU glitch is causing this problem for you. It is uncommon, but when I had my cam replaced last summer this was brought up by my tech that they have seen few cases of ECU causing misfires and when they replaced the ECU everything went back to normal.
ECU would be of course expensive. What I would do before you decide to buy a new ECU is check for ALL the connectors going to the ECU to make sure all the pins are properly connected and none of them are bent or broken AND have someone with STAR reflash the ECU to it's original state and see if that will still bring you the misfire code on full load.
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Joined: Jun 2008
Posts: 19,942
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Lane - I need to go to bed. I want you to think about 2 things while I give this some more thought. Sorry we still have a problem!
1) Are you correctly identifying cylinder No 4? Quiz
which is cylinder 4? Explain
2) Do you know anybody who would loan you their MAF for a test drive?
Hang in there!
1) Are you correctly identifying cylinder No 4? Quiz
which is cylinder 4? Explain2) Do you know anybody who would loan you their MAF for a test drive?
Hang in there!
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
ok...in all seriousness, i just read your last report on what you have replaced and read that the misfire code comes up when you are on full load? if I read that correctly...
WITH all the parts replaced, the only cause for the misfire would be not enough fuel (running lean) which causes the ECU to shut that cylinder down to prevent detonation OR not enough air causing too rich of a mixture which would also causes the ECU to bring the misfire code and shut the injector down to prevent flooding the cylinder.
now, since you did replace all the parts with new parts, so I can safely assume that everything should be working properly and as it should. It leads me to believe that a ECU glitch is causing this problem for you. It is uncommon, but when I had my cam replaced last summer this was brought up by my tech that they have seen few cases of ECU causing misfires and when they replaced the ECU everything went back to normal.
ECU would be of course expensive. What I would do before you decide to buy a new ECU is check for ALL the connectors going to the ECU to make sure all the pins are properly connected and none of them are bent or broken AND have someone with STAR reflash the ECU to it's original state and see if that will still bring you the misfire code on full load.
WITH all the parts replaced, the only cause for the misfire would be not enough fuel (running lean) which causes the ECU to shut that cylinder down to prevent detonation OR not enough air causing too rich of a mixture which would also causes the ECU to bring the misfire code and shut the injector down to prevent flooding the cylinder.
now, since you did replace all the parts with new parts, so I can safely assume that everything should be working properly and as it should. It leads me to believe that a ECU glitch is causing this problem for you. It is uncommon, but when I had my cam replaced last summer this was brought up by my tech that they have seen few cases of ECU causing misfires and when they replaced the ECU everything went back to normal.
ECU would be of course expensive. What I would do before you decide to buy a new ECU is check for ALL the connectors going to the ECU to make sure all the pins are properly connected and none of them are bent or broken AND have someone with STAR reflash the ECU to it's original state and see if that will still bring you the misfire code on full load.
Thread Starter
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Joined: Aug 2009
Posts: 868
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From: Orlando, FL
C240
Hahaha, cylinder four is the one farthest from the driver, on the driver's side. I had terrible trouble when putting back the plug wire for the spark plug nearest to the driver, driver's side, so I took a new one from cylinder four, and swapped plug wires. I was getting misfires anyway, so I thought it wouldn't hurt, since cylinder six is trouble free.
I know no one who has a c240.
ECU reflash.. is it something quick with Star? For instance, can I just go to my dealership and ask they do it like they did my xenon=present settings?
EDIT: woah woah woah! They make an under-drive pulley for the 240? Or does the brabus kit include a blower?
I know no one who has a c240.
ECU reflash.. is it something quick with Star? For instance, can I just go to my dealership and ask they do it like they did my xenon=present settings?
EDIT: woah woah woah! They make an under-drive pulley for the 240? Or does the brabus kit include a blower?
Last edited by laneshift; Aug 6, 2010 at 09:48 PM.
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Joined: Jun 2008
Posts: 19,942
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Lane - nearly 4am in the morning this end but this thing has got me wide awake. Do you have any contacts at a dealer that would do an ECU flash for you cheaply or give you some Star time at a reasonable cost just to see if they can diagnose something we are missing. Tell them that you have limited funds to spend on the car. If we can just correctly diagnose what is wrong we can DIY the fix. Buy a can of contact cleaner & clean all ECU connectors and any connector relating to Cylinder 4.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Hahaha, cylinder four is the one farthest from the driver, on the driver's side. I had terrible trouble when putting back the plug wire for the spark plug nearest to the driver, driver's side, so I took a new one from cylinder four, and swapped plug wires. I was getting misfires anyway, so I thought it wouldn't hurt, since cylinder six is trouble free.
I know no one who has a c240.
ECU reflash.. is it something quick with Star? For instance, can I just go to my dealership and ask they do it like they did my xenon=present settings?
EDIT: woah woah woah! They make an under-drive pulley for the 240? Or does the brabus kit include a blower?
I know no one who has a c240.
ECU reflash.. is it something quick with Star? For instance, can I just go to my dealership and ask they do it like they did my xenon=present settings?
EDIT: woah woah woah! They make an under-drive pulley for the 240? Or does the brabus kit include a blower?
- I had to checkWe'll worry about pulleys later. I think the pulley that Frank is talking about just underdrives the accessories.
Why did this car run fine for 400 miles after changing the filter
Thread Starter
Super Member
Joined: Aug 2009
Posts: 868
Likes: 0
From: Orlando, FL
C240
Lane - nearly 4am in the morning this end but this thing has got me wide awake. Do you have any contacts at a dealer that would do an ECU flash for you cheaply or give you some Star time at a reasonable cost just to see if they can diagnose something we are missing. Tell them that you have limited funds to spend on the car. If we can just correctly diagnose what is wrong we can DIY the fix. Buy a can of contact cleaner & clean all ECU connectors and any connector relating to Cylinder 4.
MBworld Guru
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
Hahaha, cylinder four is the one farthest from the driver, on the driver's side. I had terrible trouble when putting back the plug wire for the spark plug nearest to the driver, driver's side, so I took a new one from cylinder four, and swapped plug wires. I was getting misfires anyway, so I thought it wouldn't hurt, since cylinder six is trouble free.
I know no one who has a c240.
ECU reflash.. is it something quick with Star? For instance, can I just go to my dealership and ask they do it like they did my xenon=present settings?
EDIT: woah woah woah! They make an under-drive pulley for the 240? Or does the brabus kit include a blower?
I know no one who has a c240.
ECU reflash.. is it something quick with Star? For instance, can I just go to my dealership and ask they do it like they did my xenon=present settings?
EDIT: woah woah woah! They make an under-drive pulley for the 240? Or does the brabus kit include a blower?
under-drive pulley kit is made by evosport. purpose is to under-drive the accessories so it ease the workload on the crank. you should see a 15hp crank improvement. i drove his car before and after, you can definitely feel the difference. for $400 ish, you can't beat the result. his Brabus stuff are the front/rear bumpers, muffler, puddle lights, and minor badging.
There are actually quite some stuff you can do to the M112 even in the 2.6 form. Brabus has a B9 kit which replaces the cams and tunes the ECU. Kleemann has the supercharger, and a lot of ppl now makes headers for the m112. believe it or not it's not hard to get to 200hp at the crank on the 2.6
Thread Starter
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Joined: Aug 2009
Posts: 868
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From: Orlando, FL
C240
You must remember, too, my car drove fine when I first changed the plug wires and plugs, but went to China, and upon return, the misfire returned, too.
I'm noticed if I baby the car for a hundred or so miles, I can get very, very lucky and maybe hit through first gear at max rpm's without a misfire. Probably just luck and in my head.
I can rev it in neutral while the car is moving, and redline it, no issues. Just under load.
Thread Starter
Super Member
Joined: Aug 2009
Posts: 868
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From: Orlando, FL
C240
ECU reflash is pretty quick using the STAR. dealership might still charge you for it tho.
under-drive pulley kit is made by evosport. purpose is to under-drive the accessories so it ease the workload on the crank. you should see a 15hp crank improvement. i drove his car before and after, you can definitely feel the difference. for $400 ish, you can't beat the result. his Brabus stuff are the front/rear bumpers, muffler, puddle lights, and minor badging.
There are actually quite some stuff you can do to the M112 even in the 2.6 form. Brabus has a B9 kit which replaces the cams and tunes the ECU. Kleemann has the supercharger, and a lot of ppl now makes headers for the m112. believe it or not it's not hard to get to 200hp at the crank on the 2.6
under-drive pulley kit is made by evosport. purpose is to under-drive the accessories so it ease the workload on the crank. you should see a 15hp crank improvement. i drove his car before and after, you can definitely feel the difference. for $400 ish, you can't beat the result. his Brabus stuff are the front/rear bumpers, muffler, puddle lights, and minor badging.
There are actually quite some stuff you can do to the M112 even in the 2.6 form. Brabus has a B9 kit which replaces the cams and tunes the ECU. Kleemann has the supercharger, and a lot of ppl now makes headers for the m112. believe it or not it's not hard to get to 200hp at the crank on the 2.6
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Lane - Back to basics - when this car first misfired that caused you to start this thread. Had you just filled up with gas? You changed the fuel filter. Is there any chance that you have a load of crap in your fuel tank & we have another clogged filter?? When you changed the filter did a lot of crap come out of the fuel pipes? I'm just trying to cover all bases & make sure we dont have to clean the fuel tank. We are heading for the Star - I can see it coming. Man it's a pity you don't stay close to John Anderson or Karo.
This question is a forlorn hope.
This question is a forlorn hope.
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Joined: Aug 2009
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From: Orlando, FL
C240
Lane - Back to basics - when this car first misfired that caused you to start this thread. Had you just filled up with gas? You changed the fuel filter. Is there any chance that you have a load of crap in your fuel tank & we have another clogged filter?? When you changed the filter did a lot of crap come out of the fuel pipes? I'm just trying to cover all bases & make sure we dont have to clean the fuel tank. We are heading for the Star - I can see it coming. Man it's a pity you don't stay close to John Anderson or Karo.
This question is a forlorn hope.
This question is a forlorn hope.
I don't recall just filling up. No, I did not. I wasn't near a gas station.
When I swapped fuel filters, the gasoline was pretty clean, no crap coming out of the lines.
Last edited by laneshift; Aug 6, 2010 at 11:47 PM.
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2019 G70 6MT & 2022 Ford Maverick XL
If there were something wrong with the fuel filter and/or a ton of junk in the gas tank wouldn't he get the random multiple misfire code? Why would it ONLY affect cylinder 4? That doesn't make sense. All the parts are new on that cylinder so it is even at an advantage, even slight - crap gas or clogged filters should affect the other cylinders.
