glow plugs??
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Elder User
Joined: Dec 2006
Posts: 715
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From: germantown, WI
glow plugs??
well i found out that my engine block heater does work but now when i fire my truck up...(i have the gpr led) it fires up fine but when it runs in the beginning alot of blue smoke and it just sits there and romps for awhile is this a glow plug problem or is this an injector issue?
Junior User
Joined: Jan 2006
Posts: 50
Likes: 0
check your glow plugs!!! I had the same problem early this winter, slow starts, lots of white smoke after startup for 5 - 10 min and a fair amount of chug after startup. Get your self an ohm meter, pull the plugs off of the valve covers and check the outer two pairs of connectors on the valve cover. If memory serves me they should read around .6 - .8 ohms. I had two bad glow plugs (one one each side of engine) bad. There were times it would take 15 min. too get the truck started in the morning at 20 degrees. There is a full write-up here in the 7.3 area on how to check and what to check for, look back around October 2007.
Hope this helps.
Good luck.
Hope this helps.
Good luck.
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
This is Mike's (Tenn) write up for the glow plug resistance check. IT is certainly worth checking, but again, at -15, i would change to sysnthetic oil, and I dont think you have a problem
There is only one GPR. It is the small one in the rear. If you have two, the larger one in the front is for the Intake air heater.
To check the harness ohm it at the Valve cover connector on the outside.
Pin Out
G G I I C I I G G
G=Glow Plug +
I = Injector +
C= Injector Common
***The injectors fire with a 115VDC signal from the IDM do not pierce to wires to test.***
Ohm between "I" and "C" to test the injectors, should be less than 5.0 Ohms
To check glow plugs Ohm between "G" and battery ground should be between 0.1 and 2.0 Ohms
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There is only one GPR. It is the small one in the rear. If you have two, the larger one in the front is for the Intake air heater.
To check the harness ohm it at the Valve cover connector on the outside.
Pin Out
G G I I C I I G G
G=Glow Plug +
I = Injector +
C= Injector Common
***The injectors fire with a 115VDC signal from the IDM do not pierce to wires to test.***
Ohm between "I" and "C" to test the injectors, should be less than 5.0 Ohms
To check glow plugs Ohm between "G" and battery ground should be between 0.1 and 2.0 Ohms
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