I have a 1984 300D Turbo. A week ago I was asked to test drive a non-turbo 300D and found it had a lot more power than my 300D Trubo at lower speed. I was shocked. And spent weekend in the mountains with overnight temperature at about 22ºF. The car started OK. I let it warm up for about 5 - 10 minutes. When I drove it, I could hardly get it to go more than 10mph. And it is slightly better with warmer temps around 50ºF in the morning. It has new fuel filters (both). I never use bio-D or VO. It always starts easily. When it stops, there's a little hesitation. But that is the vacuum, not lack of compression. As soon as the vacuum kicks in, the engine stops immediately. I drove at 55mph for 3 hours and got 38mpg.

Once warmed up and at higher speeds it has a lot of pick-up.

So why is this thing a dog at lower speeds?

Thank you,
Paul

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1984 300D Turbo