Engine Mechanical problem
1996 Plymouth Voyager 6 cyl Front Wheel Drive Automatic 135000 miles

at first there was a check engine light on for egr valve and random misfire. we did new plugs and wires and egr valve. the codes were erased and never came back.2 weeks later it started to stall when we came to a stop.also when you start it back up the first little bit of gas you give it, it hesitates then revs up fine. no check engine light. the 2 shops put in, tps,iac, fuel pump, fuel filter, crank sensor, and did a fuel injector cleaning. still not fixed same symptoms. also the stalling and hesitation is not all the time just periodicly. any ideas?

also wanted to add there is no vacuum leaks and a new map sensor has been istalled. still not fixed.