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Discussion Starter · #1 ·
For these of you having fun with Bosch spark plugs:

Bosch plugs are weird - I had my wires and plugs replaced recently and still the car had some moments I would say it's fouling a little bit.

Today I finally dumped my second set of new fouling Bosch sparkplug set.

I put in the Champion Copper Plus 302 (N11YC) and my car drives stronger and noticeably smoother.

No more Bosch!!!

I recommend Champions to anyone here.
I gapped mine 0.34 inch. I am indeed very surprised.
The difference is HUGE.

And the cost is $1.19 EACH. It is so cheap!
 

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78 240D
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56 Posts
What Bosch plugs did you have? If they were platinum ones, they wont work right because they have resistors. (nor will any other resistor plug) They tried to give me those at Kragen once.
 

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1990 300SE
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1,473 Posts
I work at a Kragen, and I can tell you to never go in there if you need parts for European cars. The system is pretty wierd sometimes. I'm gonna look up what part numbers the computer gives me for the plugs tomorrow.

I can't use my 25% discount on half the stuff I need because our suppliers don't make them.

But if you ever want some parts, go to store 733 (mission viejo, ca), and I'll see what I can do.
 

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Depends on the day!
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13,419 Posts
I've run Bosch plugs in All my MB's w/ excellent results. It is true, the M117/116's hate platinum plugs.. In my 560's the W9DCO's gapped at 42 gives me excellent results.
All the cars I work on I've installed Bosch as well, no problems as of yet and I can only imagine how many 100's of plugs that is!

Jonathan
 
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