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thanks 230/8 I will check the vacuum as i rev it, I can follow it with the megasquirt MAP display and the vacuum seems to be behaving normally just low throughout the range.
another weird pointer is (mine is a euro spec engine) that the vacuum at the throttle body taken from the vacuum advance feed is 15 inches while the MAP feed at the rear of the intake plenum (the original MAP sensor feed point) is only 12 inches. is it possible to have that much discrepancy across the plenum?
cheers
barri
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