Cranks but not starting?

Tiny
FINNERTY0
  • MEMBER
  • 2001 JAGUAR VANDEN PLAS
  • 4.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
Fuel pump fuse not getting voltage with the key on. Do I need to reset the security system or is the fuse box bad?
Sunday, June 15th, 2025 AT 5:03 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 52,419 POSTS
Do you have a security light flashing when you try to start the engine? If so, I would do a hard system reboot.

This guide can show you how:

https://www.2carpros.com/articles/step-by-step-guide-performing-a-hard-system-reboot-for-your-vehicles-electronics-systems

The fuel pump fuse will only get power when the fuel pump relay is activated which is controlled by the engine computer. The computer will not turn the fuel pump on if it does not see airflow at the MAF sensor. I would unplug it and see if it starts, I would go over this video as well:

https://www.youtube.com/watch?v=lXLJbuAZ4CE&t

Please go over these guides and get back to us.

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Monday, June 16th, 2025 AT 11:03 AM

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