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Johnny Mullet · 08-25-2008, 05:57 PM

Here are what normal vacuum readings should be on a properly working gauge and a properly running engine.............

IDLE - 18-22
DECEL - 22-30
ECONOMY - 10-18
POWER - 0-10

The goal to saving fuel is to monitor it while at cruising speed. Keeping a constant reading like 10-12 will net the best results. Never accel hard so it drops below 5 because that is just a waste of fuel. Watching it at idle will tell you if the engine is running properly. The gauge should really not fluctuate at idle if it's running right.

I do use mine during accel. I keep it at 10 or higher and shift whenever I feel it will not draw more then 10 for the next gear. It's usually right before the shift light comes on, but if I am going up a hill, I will stay in the gear that gives me around 10 even if this involves higher RPM's

08-25-2008, 05:57 PM	#3 (permalink)
Johnny Mullet Hi-Tech Redneck Join Date: May 2008 Location: Ashtabula, Ohio Posts: 1,436 Thanks: 6 Thanked 49 Times in 42 Posts	Here are what normal vacuum readings should be on a properly working gauge and a properly running engine............. IDLE - 18-22 DECEL - 22-30 ECONOMY - 10-18 POWER - 0-10 The goal to saving fuel is to monitor it while at cruising speed. Keeping a constant reading like 10-12 will net the best results. Never accel hard so it drops below 5 because that is just a waste of fuel. Watching it at idle will tell you if the engine is running properly. The gauge should really not fluctuate at idle if it's running right. I do use mine during accel. I keep it at 10 or higher and shift whenever I feel it will not draw more then 10 for the next gear. It's usually right before the shift light comes on, but if I am going up a hill, I will stay in the gear that gives me around 10 even if this involves higher RPM's __________________ GeoMetroforum.com - got mpg?