What happens when one glow plug goes bad?
What happens when one glow plug goes bad?
A diesel engine has one glow plug control module which controls the glow plugs. This means that you might not notice when a single glow plug goes bad as this only affects one cylinder in your engine. However, if two of three go bad or the control module itself malfunctions, you’ll quickly find it difficult to start the engine.
Where is the glow plug control module located?
Located on the engine and with a direct connection to the engine control unit, the control module uses a microprocessor to analyse input from the engine control unit to determine information related to the working of the glow plugs.
When does the glow plug indicator light come on?
The system typically makes the driver wait around 10 seconds while the plugs warm up the engine. Once the correct temperature has been achieved, the computer will then let the driver start the engine. Normally, the glow plug indicator light will come on only when the engine is cold.
When to turn off glow plug on diesel engine?
You should always wait for the light to shut off before attempting to start the engine. Being a little patient will help keep your engine going strong in the long run. Our certified technicians are always available if you ever require assistance identifying glow plug issues.
What should I do if my glow plug is not working?
But the PCM continues to provide power to the glow plugs for as long as 180 seconds to pre-heat the combustion chamber—even though the “wait” light is off. If you suspect a problem with the glow plug system, start here: 2.At the glow plug connector (GPC) on the right side valve cover, check for battery voltage on the large black/yellow wire.
Why is my pre glow warning light not working?
If a new glow plug doesn’t remedy the problem, take a look at other parts of the circuit, mainly the timer. The timer’s job is to turn the plugs off once the correct temperature has been reached. A faulty timer may keep the plugs on for too long, wearing them out, or even not turn the plugs on at all.
What is the code for a bad glow plug on a Chevy?
Last month it showed a continuous check engine light with the underlying code PO677 (a failed glow plug on the number 7 cylinder). The local Chevy dealership found that the bad glow plug was also seized into the aluminum head.
Located on the engine and with a direct connection to the engine control unit, the control module uses a microprocessor to analyse input from the engine control unit to determine information related to the working of the glow plugs.
