Engine misfiring, diagram of vacuum hoses needed?

2000 BUICK LESABRE
225,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC
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TABITHA STUECKLE
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  • 2 POSTS
Car is misfiring after replacing spark plugs, spark plug wires, coil packs and base plate for coil packs.
Aug 21, 2023 at 9:24 PM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

If you look at pics 1 and 2 below, they provide the vacuum information. However, I have a question. If the misfire started after the work, are you sure one of the new spark plug wires wasn't mixed up or damaged?

If you look at pics 3 and 4, they provide the firing order and spark plug wiring. Check to make sure they are in the correct order.

Let me know.

Take care,

Joe

See pics below.
Aug 21, 2023 at 9:32 PM
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TABITHA STUECKLE
  • MEMBER
  • 2 POSTS
It started before I changed everything.
Aug 24, 2023 at 4:29 PM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

Thanks for letting me know. Have the vacuum schematics helped? Did you find any issues with the hoses?

Let me know.

Joe
Aug 24, 2023 at 7:58 PM
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