1995 Saturn that will start great on a cold start but once warmed up will not crank unless holding gas pedal to the floor?
There can be a number of things going on when the engine quits or won't start when it's warm. One is a problem with the condenser related to the ignition points. Also, you should inspect the tightness of the fasteners since metal parts expand when they get hot. Another possible problem is that the ignition coil many need to be replaced.
Why does your window crank slip when you roll down your driver side front window on your 1991 Saturn SL2?
Saturn engine interchangibility. yes, by all means you can, the only thing is ..you have to match the ignition modules to the crankshaft. i.e. use a 93 module for the 93 crank and a 91-92 module for a 91-92 crank. there is a timing difference built in to the module for the crankshaft notches. that's about it. everything else will work.