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What Year Make & Model do you have? Don't go & Change Your glow plugs tell you know what the problem is. Don't throw $$ away on something that could be good. Sounds to Me you other problems than glow plugs. Need more info. Was your engine's light on prior to this problem if so there could be some codes to indicate what the problem is!
Try changing No1 glow plug with No 2 and see if the code changes, if it does you may well have a faulty new plug ( it happens frequently with the non genuine products )Regards Mike
the glow plug are used to heat the fuel on start up only, as a diesel uses compression instead of a spark (from the spark plug) have you try checking the connection on the glow plug, or changing the glow plugs themselves?
glow light bulb could be burned out.but glow plugs is control by ECM AND RELAY.do your vechicle start but you dont see glow plug light on to let you know glow plugs are energized heating up.also check glow plug fuse, look in owner manual in glovecompartment it will show all fuses and relays locations.
Your diesel vehicle is equipped with glow plugs, and also with a Glow Plug Light that will either come on and stay on, or flash or blink when a fault is detected by the ECU (engine management unit). When the Glow Plug Light comes on, the ECU stores information about the condition that has caused it to come on.4 Jan 2016
DID YOU CHECK YOUR GLOW PLUGS AFTER REMOVING-CHECK EACH ONE MAKE SURE THATS YOUR PROBLEM AND NOT A BAD MODULE IVE GOTTEN A BAD ONE BEFORE THEY SEEM TO WORK FINE BUT DONT LET ENOUGH VOLTAGE OR TO MUCH VOLTAGE TO PLUGS.
DTC P1391 or P1393 will set when the monitor indicates that all four glow plugs are not being powered on that bank. An open in the glow plug circuits, glow plug relay, glow plugs or monitoring circuit could be the possible causes.
Both DTCs P1391 and P1393 together will set when the monitor indicates that all eight glow plugs are not being powered. An open in all glow plug circuits, the glow plug relay, glow plugs, fusible links or all three monitoring circuits could be the possible causes.
Possible causes:
glow plug relay
glow plug shunt
open in glow plug circuit(s) or monitoring circuit(s)
The operatoin of the glow plugs heat up the combuston chamber before turning over the engine. ONce the fuel hits the combustoin chamber , The fuel will ignite.
The diesel engine only runs on air and fuel .
The glow plugs are basically a resistor that heats up the combustion chamber or pre combustion chamber.
So if the glow plugs are getting power now that the relay is change out , Yes the glow plugs have a major roll in starting the engne.
Do you know where it is? or what it looks like?
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