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Glow Plug Problem

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bus63kombi

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Ok I have a 1984 M1009 CUCV, It is a kick ass truck, Runs great but when you start it when it is cold is when it gets fun. I tested the Plugs and all 8 are at around 1.4 ohms, So I tested to see if there was voltage coming to the plugs, and nothing, So a friend gave me another relay and I put it in, and still nothing, The top red wire gets 24 volts, the bottom orange when gets nothing when the key is on and it says it is glowing, Where do the two smaller center wires go? And what should I look at now?
Thanks
 
mangus580

mangus580

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Glow plug controller under the dash is probably shot. Another member here has been testing repairs on them. If you are interested, send me the controller and I can attempt to fix it. (I dont have a bad one to work on, and the other member worked on his himself)
 
mangus580

mangus580

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its up under the dash, near the steering column. From what I understand, its a circuit board type card that might have a black plastic box around it, maybe 1" high by 3" wide, by 3-4 in the other direction (wire end to opposite end)
 
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bus63kombi

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Ok, i found it, Doesn't look to be anything wrong with it, like burn circuits or anything. I would need to figure out how to test it to see if that was it. But I am going to see if I can get one out of my friends parts 1009 and see if that works
 
mangus580

mangus580

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That is the most common problem with the glow plug system on teh CUCV's From what I understand, its actually pretty rare to find a good one these days. You can test the glow plug relay by determining which of the 2 small terminals are ground, and supply voltage to the other one. Dont leave them connected for more than about 5 seconds, as you dont want to fry your GP's.

Also dont use ether as a starting fluid! (just a warning) use pure silicone spray instead.
 
mangus580

mangus580

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That will work, but I would suggest changing the glow plugs out then, with 'self limiting' ones, so you dont (or someone else) leave them on too long, and swell the plugs. It is a nightmare getting sweleld plugs out. check out www.ssdieselsupply.com (think thats the link) for self limiting ones.
 
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bus63kombi

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Thank you very much. You have been a huge help with me adventures with this wonderful vehicle. See this is a jump for me, I restore VW's, I so far have 6 old aircoolers, but I love this truck.
O one other thing. What temp does the engine run at. After the thermostat opens.
Thanks again
 
mangus580

mangus580

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gotcha...

if your tubing is rated for 200 degrees, 80 PSI, you should be fine. Your cooling system shouldnt generate more than around 15 PSI I think.

do you run your truck for long periods of time? or would biodiesel be better?
 
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bus63kombi

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Yeah my normal commute is about 20 mins to an hour, I put 500 miles on my truck in the first week and half I had the truck. Right now I am running a blend of diesel and Veggie oil in the tank, But I want a heated tank for this winter and to run 100% and eventually I will be running Bio and Veggie.
 
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