runs rough,drives fine until hot, if I stop at a red light, then proceed
will start to buck and seems to lose power,when bucking stops drives fine
also after stopping for about 15mins. cranks but will not start for about
an hour then starts fine but still runs rough. I did a tune
up(plugs,cap,rotor,wires,in the process had to replace the rad. Any clue
to repair problem will be appriciated truck is a 91' chevy full size
blazer 5.7ltr. 4X4, Thank you.