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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
Tony, Got it.

With CIS a lot of fuel can still get pumped if the metering plate is slow to respond and a fair amount of fuel can make it to the exhaust.

The dist also retards about 10 deg with manifold vacuum (net -10 in the case your described). With these two things it could be fuel was still burning when the exhaust valves opened and there was so much expantion in the exhaust system the WG could not vent it and it effectively overboosted.

Or the raw fuel might have just made it the the hot turbine wheel and turned it into a little jet motor for a bit.

Also sounds like the BOV was sticking or to small.
Old 05-25-2010, 06:09 PM
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