Copap 16PCS Hand Held Vacuum Pump Tester Kit with Adapters for Automotive Vacuum Pump Test Tuner Tool Kit for Car & Truck(Blue)

I used this to check compression on my car motor

The actual gauge appears to be well made, accurate and sturdy. However the set has 2 problems in my opinion:1. The hose is not very flexible which makes it hard to screw into spark plug holes that are in tight space and one you cannot see which is common on the drivers side when the steering column is in the way.2. The adapters are knurled which makes them very difficult to remove if they stay in the hole and only the hose comes out. I was stuck trying to get it out with a long, angles , needle nose pliers 1/8th of a turn at a time. I think it would be better if they has a hex on them so you could get a socket on them.

Use this product to identify worn out engines in minutes, prior to purchasing. Or decide whether pouring cash into your old pickup truck is worth while. If it has really low compression maybe a new clutch is only part of the forward cost of maintenance.

Nice product

I purchased this tool to set top dead center on my wife's 2001 PT Cruiser and it it failed on the first use. It blew the seal on the release valve at 15psi and the gage is way off. I don't recommend waisting your money on this tool! Just my opinion!