I have an '89 1-ton with a 454. the truck has 300,000+ miles and for the past 70,000 miles I have been plagued with leaking exhaust manifold gaskests. I think that the exhaust manifolds are possibly warped, but I have never sent them to a machine shop to confirm this suspiscion. Eitherway, I would like to upgrade to some headers to increase torque, but I am unsure about what to do with the pesky Air Injection Pump System. Can the entire air pump system be removed? Where can I find an idler pulley to take the place of the pump? Will my truck pass emissions after I remove the pump? Does any company sell headers for an 89 truck 454? Will a sensor pick up a signal that the pump is not working and bring on an engine light?
- posted
16 years ago