Hey guys,

I have a valve adjustment scheduled for next wednesday. My 300D would normally pull easily from 65-80+...

However...not I won't. There is hesistation and I can almost feel it pulling back. I replaced the secondary fuel filter maybe a year ago, and just changed the primary (which was shot to my knowledge). It seems weird to think it could be something serious with the top end or the valves, as it has plenty of power on the low end. It runs well, sounds fine, and has never had any issues. This started somewhat recently, but my lack of highway driving made it difficult to notice it. I am going to replace the secondary again just for peace of mind, but any ideas?

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1976 300D
190,000 Miles
Colorado Beige

1975 300D
Parts Car
78,000 Miles
Rustbucket
Also Colorado Beige

1984 190D 2.2 (Dad's)
156,000 miles
Champagne Metallic Clearcoat