1994 e320 rough idle
Hey, The old car has been running great until last week after a 500 mile trip 2 days later started up and now has a very rough and low (500) rpm, kinda hesitates when excellerating from a stop. got home ok ,another 500 miles still no check engine light. Could it be the MAF sensor?
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Check out the tech article below; hopefully it'll help you troubleshoot the idle issue.
Mercedes-Benz W124 MAF Sensor Replacement | 1986-1995 E-Class | Pelican Parts DIY Maintenance Article -Dmitry |
or your electric throttle..you want to check if its been upgraded and has clean wiring and also could be the OVP relay which will cause this..low fuel pressure or...the pumps/filters which cause low fuel pressure..This car tends to hunt a bit for idle speed..will come and go at times steady and other times a bit lumpy..But should not be rough
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