After about 45 mins driving, My 1990 Buick skylark sputters and then stalls at a red light. I can restart car on 'Park', but stalls again when I switch to 'Drive', however after a couple tries, I'm able to move of on 'Drive' and the car operates normally.My 'Service engine soon' lightworks but does not turn on when I'm having problems. Any suggestions as to what might be wrong?