slight problem with my jeep grand cherokee , before i attempt to start it i have to wait o the fel pump to stop, and the voltage nd fuel gauge to rise, approx. 2 minutes , ten it will start and run just fine . replaced crank position sensor, fuel pump, ignition switch, and nothing changed , i stil does the exact same thing, i do however hve a check engine light ,its for the 02 sensor where i eliminated the ctalytic converter. if i shut it off and rstart it itcranks fine but if iwait a few minutes , again ill have to leave key in accessory position for 2 minutes , fuel gauge and volt gauge to rise,and it cranks