Temp light flashing and check engine light on
 

I have a 94 jetta 2.0. My car stumbles on acceleration and wont maintain the speed limit without jerkin me around. It only does it between 1500 and 3000 rpms. Unless i floor it and haul ass its fine. But tryin to cruise is a no go. Ive repalced my egr valce my iac valve and my coolant temp sensors the 2 prong and 4 prong. My plugs and wires have been replaced also. What the hell is wrong with my car. I dont burn oil or leak it. Im trubleshootin like no other and its one part at a time and a empty wallet 2 days after payday. If anybody has advice for me that would be awesome.