Pinging and engine hesitating?

1997 VOLVO S90
199,000 MILES • 2.9L • V6 • 2WD • AUTOMATIC
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SCHATSALP
  • MEMBER
  • 1 POST
It feels like sparks plugs are worn out, but this car has no spark plugs. What could it be please? (Suddenly the engine stops when warm and then starts again. pinging on the way back.
Oct 13, 2022 at 5:21 AM
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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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
It sounds like the engine is misfiring the 2.9-liter engine is gasoline so it does have spark plugs here is the location so you can change them out also we should run the codes to see what comes up. Check the images below.

1. Remove spark plug access cover.
2. Remove coils from spark plugs. Do not disconnect coil wires.
3. Remove spark plugs.
4. Check and adjust spark plug gap to:

0.030" (.75 mm)

5. Install clean, "un-oiled", spark plugs and torque to:

18 ft. lbs.

6. Refit ignition coils.
7. Reinstall spark plug access cover.

This guide can help walk you through the repair:

https://www.2carpros.com/articles/how-to-change-spark-plugs

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.
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Oct 13, 2022 at 10:46 AM
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