Glo Plug Relay
Posting Guru
Joined: Nov 2001
Posts: 1,743
Likes: 2
From: Ft Scott
It wasn't till the 97's that temperatures mattered for glow plug run times. I lived in AZ for 18 years and this is the 1st real winter that my truck has ever seen. On a 96 the PCM activates the glow plugs for just over 90 seconds no matter what. Even with temps over 100 if you shut the truck off and restart it the glow plugs will go thru the complete cycle.
Cargo Master
Joined: Jul 2006
Posts: 2,756
Likes: 38
From: Nampa, ID
X2. My GPR is the stock (brown) unit. I've had my truck for six years now and she just started giving me trouble in the mornings. I think it might the GPs because I get a LOT of white smoke and hafta keep on cranking her if I don't have her plugged in before trying to start her.
Hotshot
Joined: Oct 2003
Posts: 17,791
Likes: 99
From: Ashland City, TN
William
It wasn't till the 97's that temperatures mattered for glow plug run times. I lived in AZ for 18 years and this is the 1st real winter that my truck has ever seen. On a 96 the PCM activates the glow plugs for just over 90 seconds no matter what. Even with temps over 100 if you shut the truck off and restart it the glow plugs will go thru the complete cycle.
It wasn't till the 97's that temperatures mattered for glow plug run times. I lived in AZ for 18 years and this is the 1st real winter that my truck has ever seen. On a 96 the PCM activates the glow plugs for just over 90 seconds no matter what. Even with temps over 100 if you shut the truck off and restart it the glow plugs will go thru the complete cycle.
Posting Guru
Joined: Nov 2001
Posts: 1,743
Likes: 2
From: Ft Scott
No. Even the early PSD had temp sensors, EOT (engine oil temperature) and IAT (intake air temperature) but the PCM didn't use that info to control the glow plug run time.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Learn something every day .....
Senior User
Joined: Oct 2006
Posts: 332
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From: Emmett, ID
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