Hey guys I have a 88 blazer with a 2.8L takes a few seconds to start once started idles very low then build up and once I drive maybe a mile or two down the road it attempts to stall and runs rough sometimes cutoff n if it does I have to press the gas pedal all the way down n hold it to start bsck up...eventually it clears up...today I inspected all sensors n fuel filter looks new as well as the dizzy cap n wires no check engine light on but I did the diagnostic trick wit a paper clip n it showed codes 22 n 34 wat it going on with my truck please help me