Changed the fuel filter no improvement in pressure. once car statrts it starts fine until it sits overnight then it takes 5 minutes of cranking to start.
Try fuel injecter cleaner
SOURCE: 1998 Olds Bravada staled
Take a rubber hammer beat on the fuel tank if it starts it is the fuel . My bravada did the same thing and it was the fuel pump in the tank
SOURCE: alero will crank awhile before it finally starts w/ more details
May have small fuel leak or fuel pump sending unit leak down. Or fuel pump psi low.
After 30 minutes try this turn key on. do not try to start wait 10 seconds turn key off then on again 10 seconds then try & start if it starts right away fuel system is losing PSI either back through the fuel pump or a leak in line. If you can find no leaks would suggest replace fuel pump & assembly.
Another possible but rare fuel injectors may be leaking fuel over time & dropping PSI needed for start up.
SOURCE: Car turns over but won't crank?
you might have a bad manifold absolute pressure (map) sensor. it's on the intake manifold, it weighs the air that comes in the intake (weird huh) and if it goes bad it reports a condition that doesn't really exist to the computer that controls engine functions. if you unplug the sensor and then the engine starts, you got a bad sensor. the engine computer will set a code and the check engine light will come on, but you can replace the sensor and have the code cleared. if you unplug the sensor and the car still won't start, it's not that sensor. hope that helps. failure of this sensor will definitely cause a no start condition.
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