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Boost gone... wierd "moaning" sound... HELP
Posted by STICKMAN (more from STICKMAN) on Mon, 9 Aug 2010 07:00:50
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2000 Viggen, 100k miles, stock except open K&N Cone --
Sudden loss of boost last week. Now, never reaches mid-yellow. CEL came on, so maybe that putting it in base boost mode?
Just as boost begins, there's a LOUD MOANING SOUND. What's that? If I keep foot into it, the moan/droan goes away when boost needle gets 20% into yellow. Still performance is gone.
Last night, disconnected battery and removed engine management fuses. Re-connected this morning. CEL is off, but still no boost. Checked wastegate rod. It's connected and I can move rod in/out readily by hand.
Someone suggested it might be clogged exhaust. I disconnected exhaust at rear end of flex pipe. Makes lots of noise, but no change otherwise.
Might the turbo be shot? I have not noticed any smoke from exhaust. Might this be a clogged cat? Any other suggestions?
posted by 192.206.1...
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