2001 SD 7.3 Problems, 2 codes
Thread Starter
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Laughing Gas
Joined: Aug 2009
Posts: 1,192
Likes: 7
From: Belgrade, MT
2001 SD 7.3 Problems, 2 codes
Howdy all,
New to this forum, and new to diesels as well. I bought a 2001 f250 7.3l auto tranny about 4 months ago. I started getting SES errors last week, so I picked up an Innova 3100 CanOBD2 scan tool.
Here are the two errors I am getting
P0677 Cylinder 7 Glowplug Circuit
P1247 Turbo Boost Preasure Low
truck seems to be running just fine, so I cleared the errors. As soon as I restart the truck, poof, they are both back again.
I have done a little research thus far, and it sounds as though I have some wiring problems under the valve covers for the glow plug? Not sure if the boost is related or not?
Any help would be greatly appreciated, as this is my first venture into owning a diesel. One more stupid question before i go, have always run chevy gas trucks before this, the number one cylinder was always drivers side front, could someone tell me which side of the truck number 1 is on these ford diesels? I would guess it is more obviouse once every thing is removed from the top, but right now I cant tell.
thanks, tom
New to this forum, and new to diesels as well. I bought a 2001 f250 7.3l auto tranny about 4 months ago. I started getting SES errors last week, so I picked up an Innova 3100 CanOBD2 scan tool.
Here are the two errors I am getting
P0677 Cylinder 7 Glowplug Circuit
P1247 Turbo Boost Preasure Low
truck seems to be running just fine, so I cleared the errors. As soon as I restart the truck, poof, they are both back again.
I have done a little research thus far, and it sounds as though I have some wiring problems under the valve covers for the glow plug? Not sure if the boost is related or not?
Any help would be greatly appreciated, as this is my first venture into owning a diesel. One more stupid question before i go, have always run chevy gas trucks before this, the number one cylinder was always drivers side front, could someone tell me which side of the truck number 1 is on these ford diesels? I would guess it is more obviouse once every thing is removed from the top, but right now I cant tell.
thanks, tom
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
For your glow plug issue
https://www.ford-trucks.com/forums/4...ke-thread.html
For your Low boost, look at your intercooler boots. Make sure they are all snugged up.
https://www.ford-trucks.com/forums/4...ke-thread.html
For your Low boost, look at your intercooler boots. Make sure they are all snugged up.
Thread Starter
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Laughing Gas
Joined: Aug 2009
Posts: 1,192
Likes: 7
From: Belgrade, MT
Thanks!
Thanks for the fast replies, looks like I have alot to learn. Think i will start with an Ohm test, then go from there. These newer trucks are amazing in the power category, but sometimes i long for the days when a basic set of handtools were all that was needed for 95% of the work! Look forward to more interaction here soon.
Thanks, tom
Thanks, tom
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
If you have a California built truck you probably have a Glow plug control module instead of a GPR. I don't think with a GPR the computer can monitor the glow plugs. I would start by ohming out the 9 pin connector on the outside of the valve cover.
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Thread Starter
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Laughing Gas
Joined: Aug 2009
Posts: 1,192
Likes: 7
From: Belgrade, MT
truck
I bought the truck here in Montana, albeit used. is there somewhere to reference the vin to see if it was a Cali truck at one point?
thanks, tom
thanks, tom
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Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
Look on top of the motor, on the passenger side, Are there two relays there?
Go to post 15 and look at the picture to see the two relays.
https://www.ford-trucks.com/forums/8...not-start.html
Go to post 15 and look at the picture to see the two relays.
https://www.ford-trucks.com/forums/8...not-start.html
Thread Starter
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Laughing Gas
Joined: Aug 2009
Posts: 1,192
Likes: 7
From: Belgrade, MT
Coils
Just took a look, I have a 5" x 2" aluminum relay that has 2 bundles coming out, one green bundle on firewall side, one black bundle to the front of the engine. Next to that towards the front is a small coil, maybe 2 inches around right against the AC condensor.
The aluminum relay block has the following on the cover.
1828565c1
0521 151 001 8
BFN / 14-12
Made in Spain
The aluminum relay block has the following on the cover.
1828565c1
0521 151 001 8
BFN / 14-12
Made in Spain
Because racetruck
Joined: Apr 2007
Posts: 2,786
Likes: 104
From: Monterey Bay, CA
What you have is a Glow Plug Control Module (GPCM). It was standard on all trucks originally sold in California as well as all Excursions. Its a nice thing to have because you can diagnose one Glow Plug when it goes bad (like your #7). However, when the module goes bad its $120 for a new one instead of about a third of that to replace a Glow Plug Relay (GPR) that the non-CA trucks have.
Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
All CA trucks and excursions have them. Don't know much about them. Here is a wiring diagram for them though: https://www.ford-trucks.com/user_gal...195644.520.390
It probably won't make a huge difference with one glow plug out. I would try to get it fixed before it gets cold though. Still start at the valve cover plug ohming out number 7. Should be around 1 ohm. If that checks out I would test the other side disconnected for voltage on a cold morning. If voltage is not present with the key on it might be the glow plug controller. The glow plugs won't stay on that long depends on temp.
DTCs P1247, P1248 indicate turbo boost pressure was low or not detected.
Possible causes:
damaged MAP hose
low turbo boost
intake manifold or crossover tube hose leaks
damaged MAP sensor
damaged PCM
Inspect MAP sensor hose and manifolds for damage, leaks, restriction and misrouting.
It probably won't make a huge difference with one glow plug out. I would try to get it fixed before it gets cold though. Still start at the valve cover plug ohming out number 7. Should be around 1 ohm. If that checks out I would test the other side disconnected for voltage on a cold morning. If voltage is not present with the key on it might be the glow plug controller. The glow plugs won't stay on that long depends on temp.
DTCs P1247, P1248 indicate turbo boost pressure was low or not detected.
Possible causes:
damaged MAP hose
low turbo boost
intake manifold or crossover tube hose leaks
damaged MAP sensor
damaged PCM
Inspect MAP sensor hose and manifolds for damage, leaks, restriction and misrouting.
Thread Starter
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Laughing Gas
Joined: Aug 2009
Posts: 1,192
Likes: 7
From: Belgrade, MT
Gpcm
It is nice that it is pointing to s specific glow plug at this time. I guess if i have a bad glow plug, I should replace them all, as others will be soon to follow?
Leaving work in a few minutes here, will be Ohming out the 9 pin connector as soon as I get home and engine cools down, will post what I find then.
Being as I have that boost error in conjunction with the glow plug error, was wondering if a burnt out glow plug could cause the low boost error?
Thanks, Tom
Leaving work in a few minutes here, will be Ohming out the 9 pin connector as soon as I get home and engine cools down, will post what I find then.
Being as I have that boost error in conjunction with the glow plug error, was wondering if a burnt out glow plug could cause the low boost error?
Thanks, Tom
Because racetruck
Joined: Apr 2007
Posts: 2,786
Likes: 104
From: Monterey Bay, CA
Tom, the two codes are completely unrelated. If you clear the codes and the 1247 come back right away, I would check your MAP sensor. It may be unplugged or the hose that runs from the spider to the MAP sensor may be split or cut or pinched.