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Bad glow plugs?

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Old Sep 19, 2007 | 05:52 AM
  #1  
'86Clifford's Avatar
'86Clifford
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Bad glow plugs?

Wondering if anyone can tell me how to check for bad glow plugs.

Changed the relay and it still won't start without an either spritz. The plugs were just put in this past winter.
Any suggestions?

Thanks in advance.
Peace
 
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Old Sep 19, 2007 | 05:55 AM
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fonefiddy
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From: Duluth, Mn.
Test them for continuity, with a multimeter.

Did you use Motocraft plugs? Do a search for glowplugs. Lotsa info here.
 
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Old Sep 19, 2007 | 12:11 PM
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dieselbogging
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Take a test light and put the clamp end to a positive wire and touch needle end of the test light to the top of the glow plug. If the light lights up then its good. if not then replace the glow plug.
 
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Old Sep 19, 2007 | 01:44 PM
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Remember to disconnect the glow plug from the engine harness first, or you will get a false reading.
 
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Old Feb 29, 2008 | 10:12 AM
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Glow plugs

Are 6.9 glow plugs the same kind as '88 7.3 glow plugs?
 
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Old Feb 29, 2008 | 11:37 AM
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Originally Posted by Clayton Smith
Are 6.9 glow plugs the same kind as '88 7.3 glow plugs?
No, the connector is different, and the resistance may also be different.
 
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Old Mar 2, 2008 | 12:08 PM
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Dave Sponaugle
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From: Nutter Fort, WV
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86 Clifford and Clayton Smith,
Welcome to FTE and the IDI diesel forum.
Glow plugs changed from the 86 model which used the old style ZD 1A glow plugs that had spade connector to the 87 model which used the new style ZD 9 glow plugs with a bullet connector.
 

Last edited by Dave Sponaugle; Mar 2, 2008 at 12:11 PM.
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