OBDii Scanner Reviews

This is a compression test I performed on my RX-7 TII with 86000 miles on it. The compression tool used was made by Actron, which I purchased from Autozone. My engine passed the compression test with flying colors! The Mazda Factory Service Manual states that the reading on front and rear chambers should be above 85 psi. Lower than that is in need of a rebuild. 90+ psi is good enough to run the engine reliably 95+ psi is very good 100+ psi is excellent

• Measures cylinder compression to accurately diagnose engine condition
• Tester has 14-in high pressure flexible oil and grease resistant hose
• Compression tester has external pressure release valve
• 14mm and 18mm ends fit most spark plug openings
• 1-year warranty

Product Description
This compression tester measures cylinder compression to accurately diagnose engine problems like leaks from ring and valves. It allows you to measure pressure within the combustion chamber as the piston come up on the compression stroke. A push-button side release valve is included which allows repeated testing without disconnecting. This compression tester has 1 year warranty.... More >>

Actron CP7827 Compression Tester Kit

• Includes adapters for 10mm, 12mm, 14mm, 14mm long reach, and 18mm standard spark plug threads
• Storage pouch keeps parts organized and repair kit includes valves and rubber O-rings
• Bourdon tube provides accurate readings and has 2-1/2 professional gauge
• Heavy-duty rubber boot protects gauge
• 1-year warranty

Product Description
This compression tester measures cylinder compression to accurately diagnose engine leaks from rings, burnt valves and blown head gasket. This tester has a quick disconnect coupler that separates the hose from the gauge for faster, easier connections to the engine. Also included are a push-button side release valve that allows repeated testing without disconnecting. It is compatible with all standard spark plug threads. It includes a comprehensive user manual with i... More >>

Actron CP7828 Professional Compression Tester with Storage Pouch