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Engine misfiring, diagram of vacuum hoses needed?

Tiny
TABITHA STUECKLE
  • MEMBER
  • 2000 BUICK LESABRE
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 225,000 MILES
Car is misfiring after replacing spark plugs, spark plug wires, coil packs and base plate for coil packs.
Monday, August 21st, 2023 AT 9:24 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
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.
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Monday, August 21st, 2023 AT 9:32 PM
Tiny
TABITHA STUECKLE
  • MEMBER
  • 2 POSTS
It started before I changed everything.
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Thursday, August 24th, 2023 AT 4:29 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

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

Let me know.

Joe
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Thursday, August 24th, 2023 AT 7:58 PM

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