Volvo: 1991 Volvo, fuel pumps, power stage

Question
Will not stay cranked. Will start and then lose power while driving.

Answer
Karen,
See if there are any fault codes stored address and repair as needed. Test for fuel pressure, should be 42 psi. Fuel pumps may not be operating, pump relay bad, suppression relay bad, power stage bad. See what fuel pressure is and if there is spark, and when driving do you loose fuel pressure.