Diesel Glow plugs taking too long



Diesel Glow plugs taking too long

Postby chromebumpers » January 31st, 2014, 2:32 pm

It used to take just seconds for the coil symbol to go out and then I could go for starting. Now it's about 3 minutes or more to be ready to start. Is it the extra cold weather or are the glow plugs going bad? How do I test or solve what may become a bigger problem.
Thanks
Rich
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Re: Diesel Glow plugs taking too long

Postby mathd » January 31st, 2014, 3:04 pm

Longer in the cold is normal.. but 3 minute?
Gotta fix this before it hurt your truck.
I think more that 20-30 second is hurting the system.

First, id check the voltage at each glow plug.
then id check the resistance of the glow plugs.
And next, the glowplug control system(wich am unfamiliar with the duramax)
Mathieu
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Re: Diesel Glow plugs taking too long

Postby chromebumpers » January 31st, 2014, 10:08 pm

Wouldn't the truck show a fault code for glow-plug problems?
Rich
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Re: Diesel Glow plugs taking too long

Postby 87vette81big » February 1st, 2014, 7:43 pm

With an OBD 2 Scanner like a Snap On Modis or similar you can Moniter Each individual Glow Plug current draw. See if any are weak or burnt out.
The Duramax Glow plug module is located on thw Drivers firewall recall Rich.
It will have a large 5/16 " diameter Red power wire running to the Glow plug module.
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Re: Diesel Glow plugs taking too long

Postby chromebumpers » February 2nd, 2014, 10:06 am

87vette81big wrote:With an OBD 2 Scanner like a Snap On Modis or similar you can Moniter Each individual Glow Plug current draw. See if any are weak or burnt out.
The Duramax Glow plug module is located on thw Drivers firewall recall Rich.
It will have a large 5/16 " diameter Red power wire running to the Glow plug module.


Thanks Brian. How have you been, you've been somewhat quite lately.
Rich
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Re: Diesel Glow plugs taking too long

Postby 87vette81big » February 2nd, 2014, 10:12 am

chromebumpers wrote:
87vette81big wrote:With an OBD 2 Scanner like a Snap On Modis or similar you can Moniter Each individual Glow Plug current draw. See if any are weak or burnt out.
The Duramax Glow plug module is located on thw Drivers firewall recall Rich.
It will have a large 5/16 " diameter Red power wire running to the Glow plug module.


Thanks Brian. How have you been, you've been somewhat quite lately.


Yeah...Ok Rich.
Tired if Luberal Vette owners.
Mr Pontiac this year.
Work on 410 later this year & 87 C4 vert.
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