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Mercedes CLS-350 Misfire on Cyl 2
Mercedes CLS-350 Misfire on Cyl 2
Hi Everyone
Yes its me again, sorry but i need assistance, have a 2009 Mercedes CLS 350 with a misfire on cyl 2 would'nt call it intermittent. but again its a bit strange as it comes up after a bit of driving and then stays consistent up until the engine is cold again. tried the usual stuf of swapping coils, plugs and injectors but no change. Scoped the suspect cyl injector and signal looks good until the misfire as i guess then thereis no signal as the ECM cuts off injection, switch off and switch back on and start the engine and we have the good signal back again but can visibly see the engine rocking. This led me to doing an in cyl pressure test. sorry one waveform settings are not exactly as should be. but do let me know if i need to retake it again.
Attached are wave form filesw for cyl 1 and 2. 2 being the bad one. can someone shed a bit of light on these and let me know if there is something there that may require further investigation.... I personally see some discrepencies on the exhaust valve but am not sure about whether what it is or even if im seeing it right.
Yes its me again, sorry but i need assistance, have a 2009 Mercedes CLS 350 with a misfire on cyl 2 would'nt call it intermittent. but again its a bit strange as it comes up after a bit of driving and then stays consistent up until the engine is cold again. tried the usual stuf of swapping coils, plugs and injectors but no change. Scoped the suspect cyl injector and signal looks good until the misfire as i guess then thereis no signal as the ECM cuts off injection, switch off and switch back on and start the engine and we have the good signal back again but can visibly see the engine rocking. This led me to doing an in cyl pressure test. sorry one waveform settings are not exactly as should be. but do let me know if i need to retake it again.
Attached are wave form filesw for cyl 1 and 2. 2 being the bad one. can someone shed a bit of light on these and let me know if there is something there that may require further investigation.... I personally see some discrepencies on the exhaust valve but am not sure about whether what it is or even if im seeing it right.
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- Mercedes-Benz_CLS-Class_20200817-0001_in_cyl(2).psdata
- (8.28 MiB) Downloaded 312 times
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- Mercedes-Benz_CLS-Class_20200817-0001_In_cyl(1).psdata
- (16.34 MiB) Downloaded 333 times
Re: Mercedes CLS-350 Misfire on Cyl 2
While I can't comment on the absolute values, having 0bar 0V lined up, I don't see any differences in the waveform dynamic.
- Attachments
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