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3000rpm wall

>>Some more info:  like I said, can't get up much past 3000 rpm, boost 
>>pressure doesn't seem to want to go over about 1.0 (maybe 1.1), even when 
>>I am moderately driving up a highway-hill at say 70 I get the 
>>boost-pressure light.  Engine does run smoothly the whole time though, 
>>doesn't seem jumpy or jerky.
Is this boost-pressure light actually the knock sensor light. Does this
retard timing or just lower the boost pressure? Isn't there some method for
setting up the knock sensor?

Burl Vibert
87 5kCSTQ
83 Coupe