Code 32 And 42

93' chevy lumina has codes 32 and 42. the codes were read using a snapon mt2500. the vehicle runs rough, stalls @ idle w/load(ex. power steering load), runs rich and shakes in o.d. at highway speed with minimal load. I know code 32 is egr system problem, that i'm not concerned with i already know the issue. shaking in o.d. is probably the tcc solenoid. My problem is the 42. Troubleshooter in the mt2500 is pointing towards ecm. Am I on the right track here?

yeah it's somthing with your ecm i had same code on my 92 put a new ecm on end it fix it

definitely on the right track. However, check signal from det. sensor & o2 sensor as well. If bad connection present could cause this prob. also. Test ignition module for proper operation as well, as this also could cause ecm prob. with timing.