(Products do not include spark plugs!). | insufficient /poor acceleration,unstable driving?. | poor air conditioning refrigeration capacity and even increased fuel consumption abnormality；black smoke?.
H90 Car Spark Plug Tester Dual-Hole Spark Plug Ignition Analyzer Diagnostic Tool
Car Dual Hole Spark Plug Tester Auto Engine Ignition Plug Analyzer 0-6000rpm US
Dual Hole Spark Plug Tester with Protective Cover for 12V Gasoline Vehicles
Dual Hole Spark Plug Tester 12V Gasoline Car Ignition Analyzer Diagnostic Tool
KZYEE KS30 Dual Hole Spark Plug Tester for 12V Vehicles Ignition System Analyzer
