Join Date: Jan 2013
Location: St. Louis, Missouri
Vehicle: 1999 SLK230 Kompressor
Other Toys: Old Harley, Jetski
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Won't Start-Showed PO170 Fuel Trim
Hi Everyone, My 99' slk230 just got out of the auto body shop about 2 weeks ago for a small hit in the quarter panel. They replaced my vario pump which had stop working about 6 months ago. Bonus
A few days ago the "check engine light" lit up and showed a PO170 Fuel Trim indication. The car still ran ok, a little sluggish. I have been on the forum looking this up, and first thing this morning the car will barely start and then dies. It won't go anywhere now.
Starter and battery crank the engine over with no problem and it's trying to go but won't stay running for more than a few seconds.
K40 relay has been fixed about a year ago. I'm just trying to figure out where to start looking, fuel filter, mas, crankshaft sensor?? Anybody have a good starting point.
Is it possible that autobody dust got in the mass air flow sensor and affected it? Any help is greatly appreciated.