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
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
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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
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It started before I changed everything.
Aug 24, 2023 at 4:29 PM
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JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
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