Re: Why does the glow plug go out even after I put a new...
Good question...first make sure that you replaced it from the correct position. Gas and diesel motors are not numbered the same. Left bank from front to rear are even numbered. Good luck. R-Dub
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hi, if you have any problems starting any type of diesel engine then this is a very good indication that one or more of the glow plugs need replacing, to get you home you can try turning the ignition on and then wait for the glow plug light to go off then instead of trying to start the engine turn it off then back on again, doing this usually gets it started just to get you home but this wont allways work.
Its best you replace glow plugs sooner rather than later as it could leave you stuck without a vehicle.
To change the glow plugs follow these quick instructions.
1. Look where the injectors go into the cylinder head then just under these you will see a smaller plug that will have a fixed wire this wire will be running from glow plug to glow plug this wire is held onto the glow plug by an 8m nut undo this nut on top of all the glow plugs, once undone you will notice that one of the glow plugs has two wires the other wire is the wire that carries the power to all the glow plugs so just remember witch glow plug this goes to.
2. now once you have removed the connecting power wire remember witch way it runs so as to get it back on the right way round it doesnt matter to much but might be a bit tight if you put it on the wrong way round.
3. Now how to undo and remove the glow plugs: To remove you will need a deep 10m socket place this over the top of the glow plug push down to ensure tight fit then undo this glow plug will then pull out (make sure their is no muck around the glow plug that can fall inside the cylinder so just check)
once you have it out its best you replace all the glow plugs as once one goes you will find that the others wont be to far behind.
4. Fitting new glow plugs. When your fitting the new glow plugs put them into their hole and gently screw in by hand to make sure you dont cross thread the thread as this can be a nightmare to put right. tighten the glow plugs in as much as you can by hand then nip them up using 10m socket and extension bar now dont over tighten them as this will damage the thread just tighten up till just after they stop then you should find they are ok.
Refit the wire loom on top of all the glow plugs remembering to fit the main power wire to the first plug make sure you tighten the nuts up properly on top holding the wire in place.
Once you have done this you are now ready to start your vehicle you should now find it starts with no problems.
If you still have problems starting you need to now start looking at things like the diesel filter or even the diesel pump, ill explain about these in my next post ok
Yes. I'll try to explain this. The glow plugs work by electric resistance. When they are clean and new, they work very well as there is no crud or coating on each part. The material composing each glow plug deteriorates over time something like a sparkplug.
The amount of time it takes to heat up increases as the glow plugs fail. This puts a strain on the wiring feeding the glow plug circuit.
You can test each individual glow plug using auto jumper cables and securing one end to the base and the other is briefly shorted to the top of the glow plug using battery voltage
Be careful-they melt. As you will see, some stay dark(bad) and some glow brightly(good). Or you can just put in all new glow plugs and be done with it.
There is not much information to go on. You didn't say what your vehicle is, what engine it has. Judging by what you wrote, the dealer got a fault code for the glow plug, but didn't change the plug. Instead, they want to put in a new wiring harness, even thoughthey got continuity. I think you need to take your vehicle someplace else and have a qualifiedmechaniclook at it. At least, put in new glow plugs to see if that helps.
looks like either glow plugs have gone or possibly the pre-heater sytem is faulty.
the car should start even though the glow plugs are slow to pre heat unless its a further gremlin
Check up the glow plug relay placed inside left bottom area near clutch pedal. It is no.4 relay from left to right. Verify also all electrical cables. In most cases the glow plug relay is out of order.
have you tried the glow plug relay? or if you have a test light see if theres power to glow plugs when light is on,should only light for 5 or so seconds.some of the newer hdi dont even use the glow plugs till temp is very cold,i have a 2006 2.0 hdi van and glow plug light only stays on for a second or so,and its been like that from new! is the problem just bad starting? and is it only when its cold? if you have a manual priming pump for fuel under bonnet,trying pumping before starting it could be fuel prob?ie air getting into fuel system
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