'86 Toyota Corolla Surging Problem

[staceyc509]

1.6 L Don't know about the emissions. I am in Washington State and never have had to put it through emissions cuz of where I live. When I replaced the exhaust system I do know that I had to add a cat to it cuz there wasn't one on it when I got it. Somebody had straight piped it from the manifold to muffler. I have figured out the hoses and it has cleared alot of the surging up so next I am going to move on to the timing belt since I looked in my records and found that we have put nearly 100,000 miles on it since we bought it and never have changed it. I do know that it also seems to have a wheel bearing that I need to take a look at tomorrow and see if it needs replacing or not.

[CaryJoeYork]

This is the only vacuum diagram I have.