[s-cars] misfires under (& off) boost - catastrophic plug failures

[Russ Panneton]

Mike,

That sounds like either a badly defective plug or the damage from severe 
detonation.  I've seen my boost gauge sit on 25 PSI and all my plugs are 
still in one piece.  What kind of ignition chip do you have and are the 
knock sensors on line??

Russ

mlp qwest wrote:

>Just curious, having a very recent BTDT experience shortly after a
>chip/turbo upgrade that will now run @ 24 - 25 psi of boost, how many on the
>list have experienced catastrophic plug failures?  i.e. electrode blown out
>of plug and the ceramic insulator separated from threads such that while
>still attached to the base, the ceramic tower spins like a top inside the
>base.
>
>It's the first time I've personally had a plug fail like this, but I'm now
>wondering if it is at all common.  I can't say as I recall anything recently
>on the list on Bosch plug reliability.  Fortunately I still have good
>compression in the cylinder the plug failed in; no obvious whine from the
>turbo; and still see good boost levels.  FWIW, the plug in question was
>fairly "new" i.e., less than @ 4K total miles on the car since replacing the
>set of five, and only @ 800 miles since the switch over to the bigger turbo
>and "more" boost chips.
>
>Mike
>
>
>  
>