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Discussion Starter · #1 ·
I have changed the fuel filter, checked the air/fuel duty cycle (50-60%, it has moved from what I set it too yesterday which was the 42-50%), changed plugs (Bosch 4418), cleaned cap and rotor (could probably be replaced) and cleaned and serviced K&N air cleaner.
What else am I missing?
 

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Discussion Starter · #2 ·
Pulled the K&N out and it runs great. I'll try a paper element and see if that works. The only thing I can think of is there was too much oil in the filter but I can't believe that would be enough restriction to cause the hesitation.
 

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1991 300CE, 1992 300CE, 1995 E320, 1998 E320
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Consider replacing the Oxygen sensor if it hasn't been replaced in over 60,000 miles.
 
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