Loss of power while driving and slightly shaking while driving?

Tiny
TALON DANZA
  • MEMBER
  • 2008 LINCOLN MKZ
  • 6 CYL
  • AUTOMATIC
  • 199,000 MILES
Loss of power while driving Slightly shaking while driving Sometimes won't turn over the first try but does eventually. No check engine light. Not throwing any codes.
Thursday, April 10th, 2025 AT 7:13 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
This sounds like a classic weak fuel pump issue, here is a guide to help you check the pressure:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Here is the pressure it should be and further instructions.

Engine running fuel pressure .................... 450 kPa (65 psi)

Check out the images (below). Please let us know what happens.
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Friday, April 11th, 2025 AT 10:59 AM

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