Loss of power while driving and slightly shaking while driving?

2008 LINCOLN MKZ
199,000 MILES • 6 CYL • AUTOMATIC
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TALON DANZA
  • MEMBER
  • 1 POST
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.
Apr 10, 2025 at 7:13 AM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 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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Apr 11, 2025 at 10:59 AM
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