S-10 Forum banner

black soot

  1. S10 / S15
    Okay so I did an engine swap in a 1991 s10 blazer LT Tahoe edition. The guy I bought it from said it struggled to run. Before the swap it had the same condition, hard start and black soot from exhaust. I replaced the egr valve and tps and it ran better so I decided to proceed with the swap...
Top