I found that the EGR on this car had expired so I blocked the vac line and put a block off plate under the EGR itself. Since I run either 100% waste veg oil or 20% blended in the regular tank, I rationalize that I'm making less pollution anyway. One thing is certain - on straight veg oil there is no black smoke cloud under any condition and it's barely noticeable with the 20% blend!

Like you, though, I'm keeping an eye on things since increasing the boost. I'd like to get this car to 450,000 or 500,000 miles before having to rebuild or replace.

F