help me

[marine6]

i have an 88 jeep cherokee and the fuel pump whines really loud after a few mins of driving and then engine dies but fires right back up and does the same thing iv replaced the pump and the filter. any suggestions will help. thanks

[fredjacksonsan]

4.0? I'd say Crankshaft Position Sensor. Dying then starting back up is a classic symptom. How are your plugs, cap and rotor?

[marine6]

my fuel pump loses pressure as soon as i accelerate after a few min of driving it drops to about 10 psi. i have replaced the pump twice my distributor cap and rotor