Will a crack in the exhaust manifold on a 1992 Suzuki Sidekick cause the engine to have no power when I put it in gear?
correct answer is: the crack will allow air to enter the manifold and this air will make the oxygen sensor say engine is lean. then the ECU WILL force very rich fuel injections. very bad. fix all exhaust leaks on EMS engine pronto. BAD gas mileage too ! very bad. yes this condition will destroy the CAT,but the cat is a victim only. Check the catalytic converter ! Maybe stopped up & pressuring out exhaust manafold crack !