Join Date: Jun 2011
Location: Rural NW Oregon
Vehicle: 2000 SLK230 212K Miles Stock
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Why is my performance dropping off?
2000 SLK230 with 250K miles, runs great. Starts instantly hot or cold, 28 MPG in country driving with 55MPH speed limits and small towns.
But it doesn't seem to have the power it used to.
Got a 0-60 timer app for the phone, I have a 10 second 0-60 time now!
Air filter is clean, plugs and coils fairly new.
Recently cleaned the MAF after getting P0170 and P0136 codes.
I just ordered a change of supercharger oil, didn't know I needed that until I started reading about it here. Thanks!
I have a dashboard monitor that I plug into the OBD II connector, shows my boost. What should the peak boost be?
No surging, lagging, or difficulty starting. Probably running the original O2 sensors ( I have had it for the last 80K miles and I didn't change them).
Suggestions on where to look?