Please Help before I lose my mind!
 

I recently bought a 1988 4runner v6 3.0 4x4 automatic has 3vze motor. It has some serious oil leaks but other than that ran fine during test drive. Drove for a week checking oil everyday, was all good. Went to get in it and checked oil none was showing on the stick. I only had 2 quarts available. I put those in and drove in to maintenance bay at work and had mechanic put more in. Well I guess he didn't check after he put oil in and neither did I before I drove it. I drove home which is about seven miles away. Everything was fine during drive. I didn't get in till about 2 days later and went to start it up. It was hard to start so gave it gas. When it cranked it was missing real bad and as soon as I let off throttle it stalled immediately. I checked oil and it was about 1 1/2" above full line. It needed a tune up anyway so I drained oil to proper level, changed plugs, wires, distributor cap, and rotor. That helped to quick start but still no idle, just stalls. I know from research it is vacuum leak, throttle body, or vane wind meter. I cleaned throttle body, mas and changed gaskets on them using proper torque. I tested hoses with vacuum tester and everything seemed to hold. I could not get vacuum on throttle body or EGR disk? I don't know if was doing it correctly. I also noticed small traces of oil that leaked out from intake manifold gasket. Where should I start now? Would a slight leak from intake manifold cause it to create such a vacuum leak that the engine will not idle? Also don't know proper way to check and see if EGR is stuck in open position? Any ideas would help. I hooked diagnostic machine to it but said vehicle is not responding or cable not connected. It was connected ok so don't know much about that either?


Thanks
James