Crank no start fuel pump not priming?

Tiny
JSNYDE
  • MEMBER
  • 2003 JEEP LIBERTY
  • 3.7L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
No engine light upon first crank fuel pump not priming or getting power replaced fuse relay and fuel pump still no power to pump charged battery cleaned ground
Wednesday, February 11th, 2026 AT 7:18 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,831 POSTS
So if the MAP sensor does not give a signal the engine is cranking over by not showing a reading the engine will not start, I would unplug the sensor and the PCM will substitute a default value to help the engine start, here is the location of the sensor. Check out the images (below). Please let us know what happens. Ken
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Wednesday, February 11th, 2026 AT 9:53 AM

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