I warmed up my truck before leaving for school and it idled fine for a few minutes then it sounded like it wanted to die but then would return to sounding normal. When I drove it out of my driveway it would barely move and couldn't make it up the a little hill on my property. What could be wrong? It's a 1986 Toyota Pickup 4WD, fuel injected. Also, we just had a big storm pass by the last three days and the temperatures were in the 30's, don't know if that could be involved.