Spark plug Bosch or Autolite

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Bosch Spark plug
drexplode1
Rating 5.0
  • Acceleration:

Bosch Spark plugs Motul 0W-20 VW oil for the last two oil changes, about 3k miles on the current change AFE air filter Brake fluid flush within last year or so Coolant flush with VW fluid within last year or so Accessory drive belt New belly pan screws and fasteners

Mileage: 4828 km
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Bosch Spark plug

I ended up finding a post where somebody was having a similar problem that I was and one of the top comments on that post a guy had said word for word "I hope you don't have Bosch Platinum plugs in there." I ordered NGK ZFR5N copper plugs. I just received them this morning and got work. Gapped them to 0.035. Put them in. Done. Misfire gone. Runs perfect idles like butter.

Pros: misfire gone, runs perfect
Cons: caused misfires
Vehicle: Jeep Cherokee
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Bosch Spark plug

Although I prefer Bosch sensors over other brands in certain parts of my Mk 5 2.5, I will not buy Bosch spark plugs. Many professional mechanics over the last 3 decades have told me horror stories about them.

Cons: horror stories, engine problems
Vehicle: Volkswagen
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Autolite Spark plug

Yesterday, I installed new spark plugs in my 2004 TJ. Going off [this thread](https://wranglertjforum.com/threads/what-are-the-best-spark-plugs-for-my-jeep-wrangler-tj-4-0.4196/) I purchased the Autolite XP985. Originally, I gapped the plugs to .04 based on [this thread](https://wranglertjforum.com/threads/spark-plug-gap-for-4-0.17415/). The jeep ran terribly and actually threw a check engine light.

I went back today and changed all the gaps to .035 based on the note under the hood, but I still think the idle is a bit rougher then what it was before the change.

Cons: rough idle, check engine light
Vehicle: Jeep
Part number: XP985
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Bosch Spark plug
Caseywalt39
Rating 1.0
  • Acceleration:

Warning about Bosch spark plugs!!! The piece of ceramic around the electrode failed. These were in a 2018 sonata turbo for about 10k miles. Thank God it didn't fall in...

Cons: ceramic around electrode failed
Mileage: 10000 km
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