[s-cars] Miss at WOT?

[BetBuild at aol.com]

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Hey guys, I've been lurking on list for a while and I've had this missing
issue that I need to sort out real bad.  First off, I have '95 S6 w/full RS2
package, 28psi, etc.

Car runs smooth and great until you go WOT under load in the higher gears.
If I'm off the throttle, just cruising in 4th and I floor it, it boosts up to
20psi or so before it misfires bad.  Thing is, I can only get it to do it under
load.  Car has new plugs/connectors.  Any way to test if it's PSO or coils or
even a wastegate?  Car has 120k on it.

Thanks,
Mike