W203 rough start
07-19-2018, 03:36 AM
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W203 2002
W203 rough start
My w203 has a start issue, long crank when cold and still a bit rough after sitting for a few hours.
It has has p0171 code, I replaced the o2 sensor and code hasn’t come back, still rough start.
i though Maf sensor took it out leaned it (looked like maybe a little oil) put it back, same start issue,
put obd2 sensor on and maf air flow looks good, as well as temp.
Many suggestions of what to try next would be appreciated cheers.
... it’s a 2002 c200 2.0 komp
It has has p0171 code, I replaced the o2 sensor and code hasn’t come back, still rough start.
i though Maf sensor took it out leaned it (looked like maybe a little oil) put it back, same start issue,
put obd2 sensor on and maf air flow looks good, as well as temp.
Many suggestions of what to try next would be appreciated cheers.
... it’s a 2002 c200 2.0 komp
07-19-2018, 10:06 AM
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1995 E420, 1998 E300TD, 2002 CL230K 6spd, 2002 CL230K auto, 2002 CL280T VR6 Project, 2001 A6 2.7T
Put a fuel pressure gauge on it and see if it is bleeding down after you turn the engine off, if yes, it could be the fuel filter. Also make sure the pump pressure with engine running is within specification.
11-10-2019, 12:17 AM
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c200k
