[B][B]GLOW PLUG QUESTION[/B][/B] - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 11 (permalink) Old 11-07-2011, 06:10 PM Thread Starter
03 f350 xl 7.3 2wd x-tend
 
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Red face [B][B]GLOW PLUG QUESTION[/B][/B]

Hello y'all, I was wondering if anyone knew of an easy way to test glow plug functionality? The truck I traded my jeep for, the glow plugs don't work. You can hear the controller clicking but they don't do any good. The previouse owner told me this and that he would give it a little shot of esther to get it going on cold mornings. Which I've had to do the last few mornings and I really hat it. I don't want to make her "addicted" to esther. So far it takes a half second squirt in the intake hose going to the air filter and then walk back and crank her and she fires right up. So I'm not having to stream it down her throat while starting. But I wanted to know if I can test them and replace a few bad ones or if it's just better, or if they only come in a pack of all eight. Any info will be greatly appreciated. Thank y'all I know TDG has always helped.

03 f350 7.3l x-tend cab 2wd
& 1993 F-350 7.3L CREW CAB 5SPEED

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post #2 of 11 (permalink) Old 11-07-2011, 08:31 PM
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Disconnect all the wiring to the glow plugs, connect a test light to the positive terminal of the battery.
Probe the glow plug if it lights up it is good if not it is junk.
You want to test that the glow plugs are getting power to them just because you hear a solinoid does not mean it is doing anything.

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
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post #3 of 11 (permalink) Old 11-08-2011, 06:08 AM Thread Starter
03 f350 xl 7.3 2wd x-tend
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Ok thank you for the info. I'll try that tomorrow when I get the time.

03 f350 7.3l x-tend cab 2wd
& 1993 F-350 7.3L CREW CAB 5SPEED

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post #4 of 11 (permalink) Old 11-08-2011, 10:32 PM Thread Starter
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Hahah. Checked my glow plugs and got 6 bad and 2 good. Damn why can't those two work a little harder and do the work. Sum bisch. Guess I'll be doing GP

03 f350 7.3l x-tend cab 2wd
& 1993 F-350 7.3L CREW CAB 5SPEED

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post #5 of 11 (permalink) Old 11-09-2011, 01:09 AM
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Be sure you have a deep 6 point socket, and be slow removing them. Slow steady pressure. If 6 are junk I would be looking at changing them all and keep the 2 as spares, or paper weights.
Just a thought!

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
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post #6 of 11 (permalink) Old 11-09-2011, 04:11 PM Thread Starter
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Ok smart idea. I was in the area of a salvage yard and thought "what the hell" and went in to see how much. He quoted me $35. I said each and he said yep. I was like **** I can't do that today. Went home called O'rielly auto parts and the had auto liter for $10.09 each or motocraft for a buck more. I wounded if I should let the salvage yard know they are smoking crack. Because I called him back again after the O'reilly quote and he said $45 each. I just hung up. God dern R.I.P. off artists.

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& 1993 F-350 7.3L CREW CAB 5SPEED

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post #7 of 11 (permalink) Old 11-11-2011, 11:30 AM Thread Starter
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Ok I changed the glow plugs and waited for this morning for a cold start and it was in the forties. Started on its own with no Esther but still had to crank it over for quite awhile. Could this thing become "addicted" to easther? All eight glow plugs are getting power and all are lighting up when I use a test light connected to the positive battery terminal like posted above. Anything else might be the problem. Any help will be greatly appreciated.

03 f350 7.3l x-tend cab 2wd
& 1993 F-350 7.3L CREW CAB 5SPEED

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post #8 of 11 (permalink) Old 11-11-2011, 06:26 PM
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The best way I Have found to start an engine is to go threw the cycle and crank for 10 seconds, then stop and wait for 1 minute, it feels like for ever then do it again that allows the fuel in the cylinder to vaporize and that is all done without touching the throttle.
If you add to much fuel instead of igniting it just absorbs the available heat in the cylinder.
Works for me!
Using either in an engine, when the either explodes it is such a shock that it will bend the rings down. The rings on a piston actually are bent upwards, that is why there is a top mark. When ignition happens the rings are bent flat giving maximum sealing. Next time you have a piston out look at the rings the major wear is on the top edge.
It is posible to damage the rings, also using either will remove the lubrication from the cylinder and give the cylinder a gray tinge with lines going vertical.
Over time the cylinder will wear smooth, heal, the rings will not.

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
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post #9 of 11 (permalink) Old 11-11-2011, 11:34 PM Thread Starter
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Thanks I'll give that "system" of starting a try. I hated using easther but was the only way by myself. I prefer using wd-40 when the engine won't start but couldn't get it done by myselff. Thanks so much for the info.

03 f350 7.3l x-tend cab 2wd
& 1993 F-350 7.3L CREW CAB 5SPEED

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post #10 of 11 (permalink) Old 12-05-2011, 09:53 AM
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I cycle the glow plugs and crank for 5-6 seconds the first time and then cycle the glow plugs and crank for 10 seconds - down to about 35F most will start, at 10 or more deg lower it is common to do a third cycle.

They often have corrosion on connections when they get this old or come from the rust belt. Ether addicted engines often use oil - under 1k miles to the qt. I moved one from Atlanta to Ft Meyers used a qt for 300 miles with a 32 ft dryvan hooked on and 5k # on pallets on the trailer axle.

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81 Isuzu /C223na, 5spd
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