Suitable for use on all petrol engines and easily fits to most vehicles. Accurately measures pressures within the range minus 1 bar (30mHg) to plus 0.7 bar (10psi). Applications include: Engine Fault Finding, by using the gauge as an inlet manifold vacuum tester the following faults can be diagnosed: spark misfires, poor engine compression, mixture tool weak or too rich, ignition too advanced or too retarded, inlet manifold and carburettor air leaks, incorrect valve timing. Turbo boost gauge; testing boost pressure up to 0.7bar (10psi) and Petrol Pump Tester; tests electrical and mechanical petrol pumps (excluding high pressure pumps used on fuel injection engines)   Suitable for use on all petrol engines Easily fits to most vehicles Accurately measures pressures within the range - m Ideal for checking a range of applications include Easy to read gauge