Lots of good advice already given. You can start with a test light- check for power both sides of the relay and at the glow plugs. Glow plugs can be tested for resistance with an ohmmeter. The relay is a common culprit. Another way to check it out fast is with a heavy jumper wire to bypass the relay. If you have an infrared thermometer “point and shoot “ style “ that could be handy to check plugs. Do not keep power on the glow plugs for a long consecutive time or you will fry them.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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