Vehicle & Technical > Discovery

Glowplugs. GGRRRR!!

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way2deep:
have you tried a direct live feed straight to the glow plugs ,on my rangie the thingy??that is suppose to send the current thru to them packed up,so they were not getting any power to them.i have over ridden this bit now and have a master switch to send power thru.i turn my ignition on then wait about 10 seconds after the light on the dash goes out

aog:

--- Quote from: "waveydavey" ---That does sound like a spinning over problem or fuel supply rather than a engine problem.

You have not mentioned how it runs; if it runs well and gives the power when going I would not rush to tweak timing or anything.

It sounds like a 300tdi, does that have a manual priming lever on the fuel lift pump as on the 200? If it has it may be worth popping the bonnet in the morning and manually operating it. If you shift a lot of fuel and it then starts you have found the problem, if it's still soild witha  tight system then you know it's not the problem.
--- End quote ---


The noise inst the starter. It's just when you turn the ignition on, rather like a relay or suchlike making the noise. It always has done though AFAIR
As for running, well it's a bit slow, but it is a auto, it seems ok, but I was used to a V8 Disco, so it's about 50bhp anyway!!
I Will have a look for the fuel lift pump and give that a go.

I have noticed, as part of a experiment, that if I turn on thre headlights for about 10-30 secs before turning the glowplugs on, it starts much easier!!???

Go figure???

aog:

--- Quote from: "way2deep" ---have you tried a direct live feed straight to the glow plugs ,on my rangie the thingy??that is suppose to send the current thru to them packed up,so they were not getting any power to them.i have over ridden this bit now and have a master switch to send power thru.i turn my ignition on then wait about 10 seconds after the light on the dash goes out
--- End quote ---


No, I have not tried that one. Good point to try though

muddyjames:

--- Quote from: "aog" ---

As for running, well it's a bit slow, but it is a auto, it seems ok, but I was used to a V8 Disco, so it's about 50bhp anyway!!
I Will have a look for the fuel lift pump and give that a go.

I have noticed, as part of a experiment, that if I turn on thre headlights for about 10-30 secs before turning the glowplugs on, it starts much easier!!???

Go figure???
--- End quote ---


A word of warning. If it is slow top speed about 75mph? It could be the alternator pulley not done up tight enough. Mine was really struggling up hills and wouldnt go above 75 when I first bought it and 200 miles after I bought it in the morning it chucked out plumes of white smoke and wouldnt rev over 1400rpm until the engine was hot. It was all done to the alternator pulley bolt not done up tight enough and making the pulley wobble meaning the crank shaft osilated slightly which in turn meant the timing was slightly out. the more I drove it the more it went worse and I limped it to my detination in wales. So 200miles after I bought it, it went on a low loader! I was lucky and the guy it went to near Banbury and would recomend everytime to anyone rebuilt the end of the crank shaft with instant metal or similar stuff.

inside the pulley the key way had worn a little square in the metal from where it went back and forth. since then my disco was easier to start and new glow plugs even easier. Stil not fab but it starts. I think I need a new battery. But check your alternator pulley bolt. It has to be done up to a stupidly high torque. Something like an 8ft scaf bar on the end of the socket with engine in gear to do up tight enough. An air gun is not tight enough.

As to your light question. Turning the lights on warms the battery up slightly from the current flowing through it and batteries always work better in warm air or just being warm so turning the lights on just warms it enough to give it more life to start the disco.

If you want anymore info on my pulley pm me or i can pass on the details to the mechanic who did it. heres his web site neway for you all. http://north-oxon-4x4.co.uk/index.html
He is very genuine and knows his stuff. Great guy and wont rip you off. a top bloke.

muddyweb:
James... you sure you don't mean the timing belt pulley or tensioner ?

The alternator belt shouldn't have any effect on the way the engine runs.

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