It sounds like the egr valve could be sticking open partially or you still have a vacuum leak. Those older motors did have a problem with egr valves. Another issue could be an internal leak inside the throttle body. You could go to a salvage yard and get another TB to see if it helps. I would get someone to scan it with a good scanner if you don't have one to try to pin point the problem before you spend anymore money.

Ken

 

I have a scanner but it doesn't tell me much. I'm thinking it may be a worn out tb. If this helps I can unplug the Pcv valve put my finger over th tv hole and it makes a whistle sound. I'm thinking you may be right.

 

It's gotta be a vacuum problem. Now that I think on it I'm not so sure it's the entire tb. Any pointers? This is basic but complicated.

 

Here's what I can figure out. It's not vacuum or timing. Buy as far as I can tell, when I wiggle the neutral safety switch on the steering column it cuts my eng. out or speeds up idle a bit. One side is hot/ground other side is reverse lights. If I unplug the power side not the lights it will just run bad and stumble. Why is this? I thought this was supposed to prevent the eng. from starting? But it doesn't plugged in or not? Just changes engine running conditions. The book or internet doesn't say a whole lot about this. Maybe someone knows from personal experience what this does?

 

Problem solved. Distributor started squeaking so I looked at it and the bushings where out. Replaced it runs like new

 

Had a similar problem with mine years ago. Turned out the valve covers were leaking. Got them re machined from my mechanic and all was good. It seemed to be a vacuum leak but it solved the problem.