First, I want to say thank you for taking the time to look at this and respond. I am definately at the end of my rope with this.
I did run the fuel injector cleaner through it, using lucas fuel injector cleaner from autozone. no dice. can you recommend a specific brand and procedure? tried running highest octane gas, still no dice. don't have a clue on how to disconnect the fuel system from the injectors and run the cleaner through a pressure pot to clean them, but i'm totally open to the idea, is this something i can do and exactly just how to i do this. I'm guessing i mix gas and additive in a tank, pressurize, hook up to the fuel rail (? not sure where and how) and then fire it up??
haven't replaced the fuel filter, i can't remember why, i think it was hard to get to or something. it's been a long ordeal, i'll look at alldatadiy.com again and try to do that asap.
the engine knock is hard to describe. going 60 down the highway, if my foot is on the peddle in a certain place, it's starts "knocking" (maybe i'm using the wrong word here.... rapping, rymthic loud noise). let off or give more gas and it goes away.
need help again with the iac, what is it and can i reset it?
it's definately obd1, connector is black and it says obd1 on the emissions sticker.