Spark plug Bosch or Motorcraft

Bosch Spark plug
Jecklen
  • Starting:
  • Idle:
  • Acceleration:
Rating 1.0

Those spark plugs are junk, and on top of that, they are now carbon fouled. I would strongly encourage you to install new, normal, spark plugs.

Cons: spark plugs are junk
Vehicle: Volkswagen
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Bosch Spark plug
A2JET
  • Acceleration:
Rating 2.0

I ended up checking the ignition timing again, put in a new coil, new knock sensors, put in another fresh set of plugs, set the DPR MA to +5, and I failed my emissions test with the same results.

Pros: new coil installed
Cons: failed emissions test
Vehicle: Volkswagen
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