1. Check all glow plug connections. They should be tight and corrosion free. 2. Verify that engine temperature is at or below 95¡F (35¡C). 3.…

The engine glow plugs are used to heat air entering the combustion chamber. Heating the air results in improved cold temperature starting and engine warm-up.…

The Tech 2 scan tool is primarily designed to test/interrogate PCM/TCM circuits. The tool is extremely useful in locating sensor, switch, or computer faults that…

Diagnosing engine mechanical problems can be performed with normal shop equipment. Compression testing with a good quality gauge will reveal condition of the engine rings,…

Engine noises are usually sensitive to changes in rpm and load. For example, a collapsed lifter will make an audible “ticking” noise that increases in…

The purpose of road testing is basically to confirm or deny the existence of an engine fault. Procedure is as follows: 1. Note condition of…

All Hummer models are equipped with a fuel filter warning lamp. The lamp is in circuit with a sensor mounted in the filter. The purpose…

1. Disconnect fuel solenoid wire at injection pump. 2. Disconnect and remove all glow plugs. 3. Thread adapter J Ð26999-30 into glow plug hole of…

Normal parts cleaning solvents can be used for most purposes. Use brake or contact cleaner, to clean surfaces where anaerobic or RTV sealants will be…

Recommended engine coolant is an ethylene glycol base, all weather coolant with corrosion and anti-foaming inhibitors. All of the major brands are acceptable (i.e. Prestone,…