Engine stalls at idle

Okay, starting from the top car came from wash drive it to Alaska 2003 had 23,000 miles on it when I bought it I've over the last 15 years I've replaced hubs, timing belt hydraulic tension-er, EGR valve, fuel pump, distributor crankshaft sensor, timing belt again cause almost broke when I replaced it the first time cause crankshaft sensor was ripped out from being to loose under timing belt cover, so anyways fixed all that then ran good for years had no problem tell got into an accident that cause me to slide into a GMC going roughly 30 mph hit the GMC bumper with driver side door car sat for few months cause my deductible was $1,000.00 on fully covered plan so money was tight at the time. Okay, so I had problems went to jail for few months after car was fixed got out car ran fine for few months the clutch was slipping replaced pressure plate, flywheel, release bearing, replaced shift forks cause they broke when transmission was off car replaced a few pins and levers finally got car back together. Got another 2000 blah blah blah went to jail again long story short car got impounded no ins couldn't afford the impound so the GT sat in city impound for about 1.5 years tell it went through auction and thanks to a good friend of mine she bought it off auction for me tell I played her back sorry was a good friend but she ended up wanting to be an ex so I'm sure you can imagine what's next so blah blah blah control freak right. Any who. Get into argument she take the car to a radiator shop to fix the idling cause its having issues well turns out. Ex being a complete. OH! Forgot to mention 4 keys have been made for the car since I've purchased it in 2003 ok. So she makes a key and the people the radiator shop got a PCM fault code immobilizer. Made key they said it had a vacuumed leak so the changed the lower intake gasket upper intake gasket right? Okay then not sure what exactly happened cause ex is not nice and I'm sure she left a bunch of important info out telling me everything. So now the car surges up down up down in rpm. Like 1500 bounces on the gauge but only does this after warm up. So I then start cleaning the air cleaned the throttle body the car is throwing code for MAF, catalysts, 02 sensor, and so after replacing testing cleaning almost everything, those codes have not returned since. But now I am getting a cam and crank code so I test can sensor which is (distributor) basically primary resistance I 3ohms? That's odd cause the book says 5.2 6.8 or rather? So I replace distributor but before I do I test the primary resistance on the new one it turns up 3.0 as well. So now I'm like Haynes make a printing error. So I put the new one in and replace the crank sensor as well why not right? Well before I did car was not doing the rpm bouncing up down up down cause I cleaned but instead it was hard to start and would not stay running at all. Unless I held the gas pedal down then it started, but that is the only way it will start now but right before that it start rev up like normal the just shut off no it just wont start unless gas is held and you cant let go of the gas cause it won't stay running at all. Oh and by the way the cam and crank codes came back and I know the timing it perfect checked triple time made sure time was good so my question is now why are they back on and the deal connect on my car wont keep a scanner tool on unless I hold it on tight to read codes I think a pin came loose or whatever. Oh and by the way this car being my car so long I do not hear the pump kicking on when I turn the key to on position and I know it did before. Can the pump or fuel being the cause of the brain spitting out cam, crank codes? Weird I think that is where I am at now fuel or maybe the brain lost too many cells or maybe I missed something. Not sure, but can you help me?