Glow plug control module..
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'04 F-350 6.0
Joined: Apr 2006
Posts: 105
Likes: 0
From: Vine Grove, Ky
Glow plug control module..
OK..been searching the forums all morning and have not reall been able to find a clear cut answer to my question...so here it goes,
I have been having cold start problems unless I'm plugged in overnight. I'm really strapped for money so I would like to avoid taking my truck to the dealer...should I try the GPCM myself first? Was this a common problem with anyone else in the past?
My truck is an '04 6.0.
Thanks in advance..
I have been having cold start problems unless I'm plugged in overnight. I'm really strapped for money so I would like to avoid taking my truck to the dealer...should I try the GPCM myself first? Was this a common problem with anyone else in the past?
My truck is an '04 6.0.
Thanks in advance..
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
Glow plugs, and the GPCM, are pretty solid on these trucks and don't often cause problems. A more common cold start culprit is the Fuel Injector Control Module (FICM). There is a procedure in the tech folder (at the top of the forum) for checking the FICM output voltage.
You should also figure a way to get codes read to see if there are any. Many auto parts stores (like Autozone) will read codes for free, but it takes a code reader that will read Ford Enhanced codes from the CAN bus.
You should also figure a way to get codes read to see if there are any. Many auto parts stores (like Autozone) will read codes for free, but it takes a code reader that will read Ford Enhanced codes from the CAN bus.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
need to check some things out
glowplugs
Page 66: Electrical Components
Page 67: Electrical Components
There is a way to check the gp system with an inductive amp meter I dont know if its in theses 2 links or not
Check FICM Vol;tage
https://www.ford-trucks.com/forums/8...procedure.html
glowplugs
Page 66: Electrical Components
Page 67: Electrical Components
There is a way to check the gp system with an inductive amp meter I dont know if its in theses 2 links or not
Check FICM Vol;tage
https://www.ford-trucks.com/forums/8...procedure.html
Thread Starter
|
'04 F-350 6.0
Joined: Apr 2006
Posts: 105
Likes: 0
From: Vine Grove, Ky
Glow plugs, and the GPCM, are pretty solid on these trucks and don't often cause problems. A more common cold start culprit is the Fuel Injector Control Module (FICM). There is a procedure in the tech folder (at the top of the forum) for checking the FICM output voltage.
You should also figure a way to get codes read to see if there are any. Many auto parts stores (like Autozone) will read codes for free, but it takes a code reader that will read Ford Enhanced codes from the CAN bus.
You should also figure a way to get codes read to see if there are any. Many auto parts stores (like Autozone) will read codes for free, but it takes a code reader that will read Ford Enhanced codes from the CAN bus.
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
Not necessarily. The FICM takes 12V and turns it into 48V. The 48V is used to open and close the spool valves in the top of the injectors.
What happens is the 12-48V conversion circuitry starts to fail and the output voltage drops. Since it takes more power to work the injectors when they and the oil are cold, you'll get rough starts until things warm up.
What happens is the 12-48V conversion circuitry starts to fail and the output voltage drops. Since it takes more power to work the injectors when they and the oil are cold, you'll get rough starts until things warm up.
Thread Starter
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'04 F-350 6.0
Joined: Apr 2006
Posts: 105
Likes: 0
From: Vine Grove, Ky
Not necessarily. The FICM takes 12V and turns it into 48V. The 48V is used to open and close the spool valves in the top of the injectors.
What happens is the 12-48V conversion circuitry starts to fail and the output voltage drops. Since it takes more power to work the injectors when they and the oil are cold, you'll get rough starts until things warm up.
What happens is the 12-48V conversion circuitry starts to fail and the output voltage drops. Since it takes more power to work the injectors when they and the oil are cold, you'll get rough starts until things warm up.
Ok..thanks again for your answers..thank you, BLADE35 also!
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