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Old 02-16-2004 | 02:04 PM
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Spaceman Spiff
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From: Tucson, AZ,
Default RE: engine problem
Other usefull info would be:

When is it popping? At idle when you first start up? in flight?

What temperature is the engine running?

What exhaust? TT muffler? Zimmerman?

Mine makes some crackling noise with the MP2 pipe, but is perfectly smooth and quiet with the TT muffler.
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