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Hi. I want to replace the spark plugs on my car (1996 900 Turbo). I have looked at the NGK plugs, and have discovered that they have the stock plugs and what people refer to as the "high performance plugs" (colder). Which plugs should I get? My car has:
Cat-Back Exhaust
Speedparts intake
Recently installed MBC

The reason I'm replacing the plugs is because whenever i try to run boost around or over 11psi, my car shudders and hesitates at full boost, any ideas on this problem? Thanks


Part numbers
Stock - BCPR7ES-11
Cold - BCR8ES
 

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If you search for plugs, you'll see lots of my opinion. Your situation is a classic example of overgapped plugs. Pull them, soak them in something like Seafoam or Chemtool, then regap to around .035-.037
 

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bkrell said:
If you search for plugs, you'll see lots of my opinion. Your situation is a classic example of overgapped plugs. Pull them, soak them in something like Seafoam or Chemtool, then regap to around .035-.037

Yes, please, don't get Brian started on plugs ... again!;) :cheesy:

Seriously, his gap comment is right on the money!
It's suprising how much of a difference it can make!
 

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Ha hah!:cheesy: Yeah, you can tell though! Go more than an oil change or two's time and you can tell!
 
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