Some misfiring
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Joined: Nov 2016
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2007 E350
Some misfiring
This started on sunday. Every time I drive for about 30 minutes and go wot, I start getting flashing engine light plus rough acceleration and idle. Definitely a misfire as the car is shaking. I installed new spark plugs in September. So could it be the coils? For those that had this problem in the past. If it’s really my ignition coils. Should I go ahead and replace all the spark plugs too? They’re only 3 month old
https://youtube.com/shorts/jdeCEJgjH1I?si=kd-nvg_IkSs46p0q
https://youtube.com/shorts/jdeCEJgjH1I?si=kd-nvg_IkSs46p0q
https://youtube.com/shorts/jdeCEJgjH1I?si=kd-nvg_IkSs46p0q
https://youtube.com/shorts/jdeCEJgjH1I?si=kd-nvg_IkSs46p0q
Last edited by koifysh; Dec 7, 2023 at 06:08 PM.
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2019 AMG GT R
This started on sunday. Every time I drive for about 30 minutes and go wot, I start getting flashing engine light plus rough acceleration and idle. Definitely a misfire as the car is shaking. I installed new spark plugs in September. So could it be the coils? For those that had this problem in the past. If it’s really my ignition coils. Should I go ahead and replace all the spark plugs too? They’re only 3 month old
https://youtube.com/shorts/jdeCEJgjH...-nvg_IkSs46p0q
https://youtube.com/shorts/jdeCEJgjH...-nvg_IkSs46p0q
https://youtube.com/shorts/jdeCEJgjH...-nvg_IkSs46p0q
https://youtube.com/shorts/jdeCEJgjH...-nvg_IkSs46p0q
i had a similar situation where i had changed my spark plugs but after about 6-7 months my car started misfiring. Had it checked, one of the coils was going bad but i just replaced them all and all good now
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2007 E350
no need to change your spark plugs if you just changed them 3 months ago
i had a similar situation where i had changed my spark plugs but after about 6-7 months my car started misfiring. Had it checked, one of the coils was going bad but i just replaced them all and all good now
i had a similar situation where i had changed my spark plugs but after about 6-7 months my car started misfiring. Had it checked, one of the coils was going bad but i just replaced them all and all good now
P074286
P061B00
U042600
no idea what it means
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2007 E350
no need to change your spark plugs if you just changed them 3 months ago
i had a similar situation where i had changed my spark plugs but after about 6-7 months my car started misfiring. Had it checked, one of the coils was going bad but i just replaced them all and all good now
i had a similar situation where i had changed my spark plugs but after about 6-7 months my car started misfiring. Had it checked, one of the coils was going bad but i just replaced them all and all good now
P074286
P061B00
U042600
no idea what it means
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From: Charlotte, NC
17 C63S Coupe PTG1000
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2003 E320
Based on the symptoms you've described and the diagnostic trouble codes (DTCs) you've provided, it does sound like you're experiencing an engine misfire. The flashing engine light, rough acceleration, and idle, along with the shaking, are classic signs of this issue. Let's break down what these codes might indicate:
- P074286: This code isn't standard in the OBD-II code format, which typically consists of a letter followed by four digits. It's possible there might be a typo in this code. If it's meant to be P0742, it would refer to a problem with the torque converter clutch circuit, which could affect driving performance but is less likely to cause a misfire.
- P061B00: This code suggests an internal control module torque calculation performance issue. This might be related to the engine control module (ECM) and could be a sign of problems with the vehicle's computer system or software. This code might not directly point to a misfire but could indicate issues with engine management.
- U042600: This is a communication code, typically indicating a lost communication with a specific module. This could be related to various systems in the vehicle, and diagnosing this will likely require professional equipment and expertise.
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2007 E350
[QUOTE=progonat;8889055]Based on the symptoms you've described and the diagnostic trouble codes (DTCs) you've provided, it does sound like you're experiencing an engine misfire. The flashing engine light, rough acceleration, and idle, along with the shaking, are classic signs of this issue. Let's break down what these codes might indicate:
is water spill in the trunk also a culprit?
- P074286: This code isn't standard in the OBD-II code format, which typically consists of a letter followed by four digits. It's possible there might be a typo in this code. If it's meant to be P0742, it would refer to a problem with the torque converter clutch circuit, which could affect driving performance but is less likely to cause a misfire.
- P061B00: This code suggests an internal control module torque calculation performance issue. This might be related to the engine control module (ECM) and could be a sign of problems with the vehicle's computer system or software. This code might not directly point to a misfire but could indicate issues with engine management.
- U042600: This is a communication code, typically indicating a lost communication with a specific module. This could be related to various systems in the vehicle, and diagnosing this will likely require professional equipment and expertise.
is water spill in the trunk also a culprit?
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Senior Member
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From: Charlotte, NC
17 C63S Coupe PTG1000
Thread Starter
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Joined: Nov 2016
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2007 E350
Thread Starter
Super Member
Joined: Nov 2016
Posts: 568
Likes: 132
2007 E350
Finally got my coils from mercteil last week for $180 each. 2 week for delivery. Installed it today after half an hour of wiggling them out because of the god damn fuel line. Drives soooo smoothhh & the power. I can break traction 20% throttle. Thank god it wasn’t fuel pump or any other bs lol.
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2007 E350
One more question for you guys. Recently i’ve been noticing the rpm fluctuate a little bit when in idling & the car would have a light shake. It would go away for 15-20 seconds then come back and repeat. Same thing when coming to a stop. The rpm would rev up then back down, sometimes a little and other times till 1700 rpm. No codes or check engine light. Since coils and new spark plugs are out of the way. I’m speculating that its a vacuum leak or map sensor. My question is, how many vacuum valve are in the engine and where are they located? I’m going to try and replace them along with all the MAP sensor
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W205 C63 AMG Coupe
One more question for you guys. Recently i’ve been noticing the rpm fluctuate a little bit when in idling & the car would have a light shake. It would go away for 15-20 seconds then come back and repeat. Same thing when coming to a stop. The rpm would rev up then back down, sometimes a little and other times till 1700 rpm. No codes or check engine light. Since coils and new spark plugs are out of the way. I’m speculating that its a vacuum leak or map sensor. My question is, how many vacuum valve are in the engine and where are they located? I’m going to try and replace them along with all the MAP sensor
Thread Starter
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2007 E350
i already change out both my coils and plugs. No more misfure and rough idle. Just these weird pulsing and rpm fluctuations every 15 second when cold & less so when warm. But its only on idle and when coming to a stop the rpm would go up a bit then back down
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2007 E350
Another weird problem. Every time I park the car then turn it back on, put it in reverse then to drive and let it roll by itself (without touching the throttle) the rpm would surge up and down. This is reproducible no matter if cold or warm. Bad throttle sensor?
note: this only happens if I turn the car off, then turn back on and put it in reverse then drive and let the car roll. Back when I first took delivery. I remembered during cold start when I give it 0.5% throttle (a very light touch) it would do the same thing. Never thought anything of it until now
note: this only happens if I turn the car off, then turn back on and put it in reverse then drive and let the car roll. Back when I first took delivery. I remembered during cold start when I give it 0.5% throttle (a very light touch) it would do the same thing. Never thought anything of it until now
Last edited by koifysh; Mar 2, 2024 at 04:08 PM.
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2007 E350
i did change my purge valve. I think i found the cause. Looks like a small leak over time. I tightened that part a little and it help a lot with the problem. Do you know the name of this part?
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c450
Sorry which part are you referring to? The connection closest to the camera? There’s alot of leakable connections in the photo haha.
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2007 E350
