Vacuum and Fuel Pressure Tester
The vacuum gauge is one of the most useful diagnostic tools available to the Diagnostic Technician, It is consistently overlooked by many in favor of what they perceive to be a more high tech solution to an engine performance or driveability issue.
This tool can be used to quickly verify engine mechanical integrity, breathing issues, restricted exhaust systems, induction system & crankcase integrity [vacuum leaks],etc. It can also verify brake vacuum booster operation and all vacuum dependent systems. e.g. turbo waste gate, manifold actuators, egr actuators etc. it can also be used to verify DPF pressure differential sensor readings in conjunction with a scan tool. One of the features often overlooked is the pressure gauge, this particular gauge reads to 15 psi, and may be used to check for restricted exhaust systems [blocked cat], verify manifold pressure sensor operation, in conjunction with scan tool live data. it can also be used to test low pressure fuel pump delivery pressure [carburettor engines], fuel supply to HP pump [Common rail diesels, both with suction delivery and lift pump delivery]. etc. etc.
The versatility and application of this tool should now be apparent to all who choose to involve themselves in the often complex and always difficult area of engine performance and driveability. This tool belongs in your diagnostic cabinet, alongside your scan tools, meters and oscilloscopes.
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