I have a r33 gts with a boost controller. It runs very well when set on 0.5 bar of boost but it just makes a loud hissing and goes no faster when boosting at 0.8 bar,
Could this be spark plugs?
It also emmits a little black smoke at gear change is this o.k?
Could this be spark plugs?
It also emmits a little black smoke at gear change is this o.k?