Tow things with TBI units, they liked to blow the gaskets beneath the TBI- get some choke cleaner and spray at the bottom of the TBI unit if your rpm's change up or down it's leaking and has to be changed. The other thing is the vacuum hose going to the map sensor on the firewall. It gets soft and sucks together when the truck runs. Or it gets soft and leaks. Those are easy things that you can look at and fix. Also check the PCV hose as that gets soft as well. So check that.
Monday, October 25th, 2010 AT 8:34 PM