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Over in Other Cars, I posted that my Tire Pressure Monitoring System warning light had come on. Tire pressures were all between 30 and 32 psi. Warning shouldn't have been triggered.
So I wondered about my "slip stick" tire gauge. I took another from the workbench, and lo and behold - it showed 3 pounds under the reading of the first gauge. Took a dial guage, and it showed 3 pounds *above* the reading of the first gauge.
Called my neighbor, who brought his Slime dial gauge, and it showed the tires were all around 26 psi (nowhere near the 30 my first gauge showed). The warning light is triggered when sensors show a tire is 26.5 or less. Using my neighbor's gauge, I upped the pressure until it showed 33 for each tire. Warning light went out.
Heck - I don't even know if neighbor's gauge is accurate!
View attachment 45987
So ... how the heck do we know what tire pressure we've actually got? What tire gauges do you guys use? Have you ever checked for accuracy? Even the gauges on my two air pumps disagree.
grumble grumble
thanks.
Tom M.
So I wondered about my "slip stick" tire gauge. I took another from the workbench, and lo and behold - it showed 3 pounds under the reading of the first gauge. Took a dial guage, and it showed 3 pounds *above* the reading of the first gauge.
Called my neighbor, who brought his Slime dial gauge, and it showed the tires were all around 26 psi (nowhere near the 30 my first gauge showed). The warning light is triggered when sensors show a tire is 26.5 or less. Using my neighbor's gauge, I upped the pressure until it showed 33 for each tire. Warning light went out.
Heck - I don't even know if neighbor's gauge is accurate!
View attachment 45987
So ... how the heck do we know what tire pressure we've actually got? What tire gauges do you guys use? Have you ever checked for accuracy? Even the gauges on my two air pumps disagree.
grumble grumble
thanks.
Tom M.