My 94 is blowing black smoke on acceleration. The air filter is clean. My Banks turbo boost gauge shows boost up to 5psi and then it holds right there. Is 5psi of boost normal for the 6.5TD or should it be more? The truck runs strong (at least to me) after I put a new lift pump and serviced the air cleaner. Now I have to get the black smoke cleaned up to pass emissions.
Could pump timing be an issue? Thanks for any help or suggestions.
Splitrimz.