Hi,

All evidence seems to point to heat being culprit in DI failure.
Was this during the Santa Ana winds? I was caught in some of it
this week when coming back from Las Vegas. For people outside of
California, November can be the hottest time of the year because of Winds
that blow out from the desert called Santa Ana winds.

Direct Ignition Cassette, as you know, sits on top of hot engine.
Most of the time, it works fine, but given aggravating factors, it can
fail. A comment was made by dwin that "wide plug gap is straw that broke
the camel's back".

In addition on a V6 there are two DI cassettes per each bank of cylinders
with each sitting on top of 1.5L. V6 very rarely has DI failures.
However, with I4 and one DI cassette sitting on top of 2.3L, DI failure
is well known to this BB.

So, listen to Jason. Please replace spark plugs and examine gaps.
Some have reported gaps as large as 1.5 mm, which is 50% out of spec.
When Trionic senses mis-fire, it will have to try to increase voltage
in primary coils, which increases heat which reduces conductivity of
primary coils resulting in need to further raise voltage.

Dean ... are you out there? You know a lot of DI. How does DI
compensate for mis-fire? Does it try to fire twice or does it simply
try to raise voltage the next time? Either way voltage is raised
because firing twice per combustion requires greater voltage to build
up same amount of magnetic energy in a shorter amount of time.

thanks

Jae

posted by 167.4....

• Sudden dearh on US 101, Al S, Fri, 29 Nov 2002 14:40:51
  • Have anyone tried to get DI covered under ext warranty?, Anders, Fri, 29 Nov 2002 18:13:34
    • Not on the List, Al S, Fri, 29 Nov 2002 19:28:54
  • Jason is right ..., J, Fri, 29 Nov 2002 16:18:30 <-- Viewing This Message
    • Re: Jason is right ..., Dean, Sun, 1 Dec 2002 10:12:35
  • Re: Sudden death on US 101, Jason 0W-40, Fri, 29 Nov 2002 15:01:48
    • Plugs, Al S, Fri, 29 Nov 2002 19:23:03
      • please tell us the gap on the new plugs. n/m, J, Fri, 29 Nov 2002 19:53:15
    • Plugs, Al S, Fri, 29 Nov 2002 19:17:21
      • I believe that .039" is upper end of spec. n/m, J, Fri, 29 Nov 2002 19:38:44
        • 1.0mm, -.2, +.1, with 1.0mm considered nominal n/m, Dean, Sun, 1 Dec 2002 10:17:35
        • Sorry ... there is a message. "n/m" was in error. n/m, J, Fri, 29 Nov 2002 19:45:02
      • Darn! Anyone else have other ideas?, Jason 0W-40, Fri, 29 Nov 2002 19:25:54
        • Re: Darn! Anyone else have other ideas?, dtech, Sat, 30 Nov 2002 08:17:27
          • ignition secondary voltages and plugs, Dean, Sat, 30 Nov 2002 14:09:01
            • Re: ignition secondary voltages and plugs, dtech, Sat, 30 Nov 2002 15:22:36
          • This is good ..., J, Sat, 30 Nov 2002 11:44:23
            • Re: This is good ..., dtech, Sat, 30 Nov 2002 13:33:11
        • Re: Darn! Anyone else have other ideas?, g.s., Sat, 30 Nov 2002 02:06:06
          • Is he a Doctor of Boostology? ..., Dr. J, Sat, 30 Nov 2002 12:39:31
            • Possibly--why don't you..., g.s., Sat, 30 Nov 2002 19:38:27
        • Perhaps his new plugs are out of spec., J, Fri, 29 Nov 2002 19:47:26
    • but then, how would they start the car?, Scott Paterson , Fri, 29 Nov 2002 18:49:16
      • Re: but then, how would they start the car?, dtech, Sat, 30 Nov 2002 08:38:04
        • Buy a lottery ticket..., Scott Paterson , Sat, 30 Nov 2002 15:38:38
      • my understanding is that. . ., Jason 0W-40, Fri, 29 Nov 2002 18:59:35
  • That's Sudden DeaTh n/m, Al s, Fri, 29 Nov 2002 14:43:26

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