Engine vibration around 65-75mph

madpie

Member
Joined
Apr 26, 2006
Location
San Francisco, CA
Hi, i bought a used 2002 TDI Golf about 9 months ago and have been using biodiesel B100 in it. It has about 137000 miles on it and works quite well except that when it reaches speeds of between 65 and 75 it starts vibrating while i accelerate (approx 26-2800rpm). Once i accelerate to around 80 this vibration seems to go away. It also goes away if i ease off a bit on the gas. Any ideas on what might be causing this and how i can correct it?
i'll be taking it in soon for an oil change, a timing belt change, and a tune up, and it'll be great if i can have this issue taken care of at that time too.
Thanks for your help.
 
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