How Accurate are Vacuum Gauges? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

savatreatabvr · 10-26-2012, 07:09 PM

Everyone I talked to told me to buy a vacuum gauge to help troubleshoot why my mid 70's 454 acts like it's running on 7 cylinders! I finally broke down and bought a vacuum gauge thinking it was the answer, thinking it was some magical tool that would point me in the right direction! WRONG! I hooked it up to manifold vacuum and long behold, it says everything is pretty much normal! Well I've done everything short of rebuilding the motor so now I'm at a complete loss! So here's the question, how accurate are these vacuum gauges?

10-26-2012, 07:09 PM	#1
savatreatabvr Registered User Join Date: Oct 2011 Location: phoenix, az Posts: 508	How Accurate are Vacuum Gauges? Everyone I talked to told me to buy a vacuum gauge to help troubleshoot why my mid 70's 454 acts like it's running on 7 cylinders! I finally broke down and bought a vacuum gauge thinking it was the answer, thinking it was some magical tool that would point me in the right direction! WRONG! I hooked it up to manifold vacuum and long behold, it says everything is pretty much normal! Well I've done everything short of rebuilding the motor so now I'm at a complete loss! So here's the question, how accurate are these vacuum gauges?

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