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Davlyn

Davlyn

Active Member
Posts
243
Location
Bodmin, Cornwall
Evening all,
My brother got paid for a job today by means of a 1986 Land Rover 90 N/A diesel that had been laid up for 18 months. Trailered it home, put a new battery on her and after a bit of coughing and farting it jumped to life and ticked over quite nicely. We switched her off and proceed to pressure wash off the top side, underside and interior.
Wen't back to start it up a few hours later only to find when the ignition was turned on there was no glow plug light (not sure if it was working the first time we started it) and it took ages to fire with loads of black smoke. It was getting dark by this time so we shut it off and agreed to have another look tomorrow morning. Should a 1986 2.5 N/A diesel have a glow plug light on the dash? Does it have a glow plug relay? Obviously we will whip the plugs out and check them but I just need to understand how the plugs get their electrical feed?
thanks in advance,

Dave
 
pretty sure with them you had to hold the key before ignition to heat the plugs, not like conventional cars where you just turned to the notch before it starts.. dunno if thats any use to you?
 
Yes, as defender110 says, there is a soft of half turn position that you hold the key at between ignition and start which activates the glows. There is no relay or timer, so you just have to hold they key for several seconds. Also, don't press the go pedal until it's started.
 
Davlyn said:
Evening all,
My brother got paid for a job today by means of a 1986 Land Rover 90 N/A diesel that had been laid up for 18 months. Trailered it home, put a new battery on her and after a bit of coughing and farting it jumped to life and ticked over quite nicely. We switched her off and proceed to pressure wash off the top side, underside and interior.
Wen't back to start it up a few hours later only to find when the ignition was turned on there was no glow plug light (not sure if it was working the first time we started it) and it took ages to fire with loads of black smoke. It was getting dark by this time so we shut it off and agreed to have another look tomorrow morning. Should a 1986 2.5 N/A diesel have a glow plug light on the dash? Does it have a glow plug relay? Obviously we will whip the plugs out and check them but I just need to understand how the plugs get their electrical feed?
thanks in advance,

Dave
Click to expand...
Turn the key to glow position, count to twenty and then turn key to start. Do not touch the accelerator pedal at all as you do this.
 
Davlyn said:
Turboman, is glow position the second position?
Click to expand...
First turn of the key brings on dash lights, then you turn it up against a spring, yhe orange glow plug light should come on. Count twenty and then turn the key the rest of the way till starter engages.
It should start fairly easily, the fuel pump willdeliver extra fuel for the cold start, but only if you don't touch pedal. If it doesn't start after two or three goes you have a prob, start with the glows. Some have relay, some don't, but make sure there is current and the glows physically glow red.
 
Still having a few issue's with getting the old girl to run ok. What voltage reading should we be getting at the top of the glow plug when charge the ignition is on? At the moment we are showing about 2 volts which seems a little low to me. We have taken all the plugs out and tested them and they all seem fine.
Any help greatly received,

Dave
 
If these are parallel-wired plugs (one wire daisy-chained from one to the next) then 2 volts is a wee bit low... that should be 12 volts or thereabouts. THis is with the key turned to the glow plug position, right?
 
Yes this is with the ignition on. What could possibly be causing such low voltage at the plugs? And yes they are daisy chained.

Regards

Dave
 
Davlyn said:
Still having a few issue's with getting the old girl to run ok. What voltage reading should we be getting at the top of the glow plug when charge the ignition is on? At the moment we are showing about 2 volts which seems a little low to me. We have taken all the plugs out and tested them and they all seem fine.
Any help greatly received,

Dave
Click to expand...
When you say tested, I take it you mean you have seen them glow red after a few seconds of current?
You should be getting much more juce than that at the plugs. You could try a temporary lead direct from battery positive to glow plug loom, seeif it starts like that!
The only things I can see is causing it would be ignition switch, relay if any but I don't think your motor will have one, or break in the wires themselves.
 
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