'Normal' varies by engine load -- idle, WOT, decel, etc. Nothing special about the 3.2 compared to other engines re: interpreting vacuum; try here:
http://www.actron.com/publish/2004/06/07/pdf_english_16176.pdf
HTH
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1985 Carrera 3.2 -- SOLD
2026 Jaguar F-Pace / 2025 Ford Bronco Sport
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