Grid heater delete FYI

***awenthol*** · 03-12-2008, 09:35 PM

Since everyone is worried about codes with grid heater delete, I figured I'd give you my $0.01 (so simple it's not worth $0.02).

The relay is located next to the passenger side battery (obviously you can see my intake). You will need to remove the wire from the grid heater as well as the wire from the battery. In the picture is how I had things when I first did the delete.The wire from the battery is just pulled back and zip tied. I now have the wires completely removed.

EDIT: Technically you will STILL GET CODES (or at least I have been) BUT it is not a "hard" code that triggers the CEL. It's P2609

If you leave everything like this you will be code free

But, if you want to remove the relay completely you will have to do some modifying...all one needs to do is connect the two wires (circled below, they are basically caps) together using a resistor. Carl48 told me any risistor between 14 Ohms and 20 ohms will work

...the truck doesn't actually know if the grid heater is working, only that the two wires from the computer have a current flow.

And, yes it is that simple

Last edited by awenthol : 03-30-2008 at 01:50 PM.

Jpalmer · 03-12-2008, 09:56 PM

How's the cold weather starting in Iowa without the grid heater?

__________________
2004 2500HD QC SWB 4X4, 48RE w/ shift kit, leveled on 325/65 Nittos & 18" Eagles, DS Predator, AirDog FP, CFM+ manifold w/ delete, Commander, QZ Boost Fooler, Airaid MIT w/ 4510, silencer ring gone, 5" exhaust, Line-X, and more...

**Austin The DieselTech** · 03-12-2008, 09:57 PM

When would it be a good idea to put the grid heat back in or can you do without it?

__________________
Austin Jenson - Napavine, Wa
477HP/862TQ - 2003 2500 6Spd QCLB 4X4 K&N, Gauges, SBC 3600 DD, Studs, HTT62/71/13SS, Flux 2's, Smarty, TST, AirDog 150, 6" Miters, rail capped

***awenthol*** · 03-12-2008, 10:00 PM

Even before I did the grid heater delete, i wouldn't wait for the heater to cycle, so I knew that the cold starting wouldn't be a problem. I've only had it on in the teens but the truck has started just fine. My original intentions were to put the delete on for the summer and run the heater in the winter but I don't think I will...or I'll see how it goes next winter and go from there...

**Austin The DieselTech** · 03-12-2008, 10:02 PM

I keep my truck plugged in when it gets cold anyways so I prob could get away with leaving it out all the time.

__________________
Austin Jenson - Napavine, Wa
477HP/862TQ - 2003 2500 6Spd QCLB 4X4 K&N, Gauges, SBC 3600 DD, Studs, HTT62/71/13SS, Flux 2's, Smarty, TST, AirDog 150, 6" Miters, rail capped

CrAz3D · 03-12-2008, 10:03 PM

What do you gain from removing the grid heater? I talked to 04cummins a bit on the phone yesterday about it, he said he gained about 1 mpg. Why is this (this is my first dive into the diesel world)

**Austin The DieselTech** · 03-12-2008, 10:05 PM

Well the grid heater is a restriction in the airflow into the engine. Unlike gas engines, diesels don't have throttle bodies to control air flow. They are open, so the more air you can get in and out the better.

__________________
Austin Jenson - Napavine, Wa
477HP/862TQ - 2003 2500 6Spd QCLB 4X4 K&N, Gauges, SBC 3600 DD, Studs, HTT62/71/13SS, Flux 2's, Smarty, TST, AirDog 150, 6" Miters, rail capped

CrAz3D · 03-12-2008, 10:09 PM

Ok, cool. Thanks

**Austin The DieselTech** · 03-12-2008, 10:10 PM

Quote:

Originally Posted by CrAz3D

Ok, cool. Thanks

No problem. Glad to help

__________________
Austin Jenson - Napavine, Wa
477HP/862TQ - 2003 2500 6Spd QCLB 4X4 K&N, Gauges, SBC 3600 DD, Studs, HTT62/71/13SS, Flux 2's, Smarty, TST, AirDog 150, 6" Miters, rail capped

Lineman954 · 03-12-2008, 11:38 PM

Yery nice! Thanks

I'm getting one as soon as there ready, but I'm not sure yet on leaving it on in the winter yet. It gets really cold here in Michigan. I see negatives numbers quite a few times in the winter

__________________
Ian
2006 2500 QC SB, 5.9L CTD, Auto, 4X4, SLT Bighorn, Patriot Blue, Muffler MIA
Power Lineman, I.B.E.W. LOCAL 876..Comstock Park, Michigan

***99cumminsho*** · 03-12-2008, 11:41 PM

I love Florida HEHE. I think its 60* right know. Were could i get one besides spending $80 for the ones on EBAY?

__________________
1999 4x4, auto., 4:10 gears. With not enough power i gotta have more.

POWERED BY: FARM BOYS DIESEL

Last edited by 99cumminsho : 03-12-2008 at 11:47 PM.

***awenthol*** · 03-13-2008, 12:07 AM

Quote:

Originally Posted by 99cumminsho

Were could i get one besides spending $80 for the ones on EBAY?

I got mine from Glacier Diesel Performance for $60 but FarmBoys Diesel is making up a batch and he promises to sell them for less

03-12-2008, 09:35 PM	#1 (permalink)
*awenthol* Diesel Head Join Date: Jan 2007 Posts: 4,384 awenthol's Truck Pics	Grid heater delete FYI Since everyone is worried about codes with grid heater delete, I figured I'd give you my $0.01 (so simple it's not worth $0.02). The relay is located next to the passenger side battery (obviously you can see my intake). You will need to remove the wire from the grid heater as well as the wire from the battery. In the picture is how I had things when I first did the delete.The wire from the battery is just pulled back and zip tied. I now have the wires completely removed. EDIT: Technically you will STILL GET CODES (or at least I have been) BUT it is not a "hard" code that triggers the CEL. It's P2609 If you leave everything like this you will be code free But, if you want to remove the relay completely you will have to do some modifying...all one needs to do is connect the two wires (circled below, they are basically caps) together using a resistor. Carl48 told me any risistor between 14 Ohms and 20 ohms will work ...the truck doesn't actually know if the grid heater is working, only that the two wires from the computer have a current flow. And, yes it is that simple Last edited by awenthol : 03-30-2008 at 01:50 PM.

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03-12-2008, 09:56 PM	#2 (permalink)
Jpalmer Cummins Nut Join Date: Dec 2007 Location: NW Washington Posts: 300 Jpalmer's Truck Pics	How's the cold weather starting in Iowa without the grid heater? __________________ 2004 2500HD QC SWB 4X4, 48RE w/ shift kit, leveled on 325/65 Nittos & 18" Eagles, DS Predator, AirDog FP, CFM+ manifold w/ delete, Commander, QZ Boost Fooler, Airaid MIT w/ 4510, silencer ring gone, 5" exhaust, Line-X, and more...

03-12-2008, 09:57 PM	#3 (permalink)
Austin The DieselTech Wa. Chapter President Join Date: Sep 2007 Location: Napavine, Wa Posts: 1,261 Austin The DieselTech's Truck Pics	When would it be a good idea to put the grid heat back in or can you do without it? __________________ Austin Jenson - Napavine, Wa 477HP/862TQ - 2003 2500 6Spd QCLB 4X4 K&N, Gauges, SBC 3600 DD, Studs, HTT62/71/13SS, Flux 2's, Smarty, TST, AirDog 150, 6" Miters, rail capped

03-12-2008, 10:00 PM	#4 (permalink)
*awenthol* Diesel Head Join Date: Jan 2007 Posts: 4,384 awenthol's Truck Pics	Even before I did the grid heater delete, i wouldn't wait for the heater to cycle, so I knew that the cold starting wouldn't be a problem. I've only had it on in the teens but the truck has started just fine. My original intentions were to put the delete on for the summer and run the heater in the winter but I don't think I will...or I'll see how it goes next winter and go from there...

03-12-2008, 10:02 PM	#5 (permalink)
Austin The DieselTech Wa. Chapter President Join Date: Sep 2007 Location: Napavine, Wa Posts: 1,261 Austin The DieselTech's Truck Pics	I keep my truck plugged in when it gets cold anyways so I prob could get away with leaving it out all the time. __________________ Austin Jenson - Napavine, Wa 477HP/862TQ - 2003 2500 6Spd QCLB 4X4 K&N, Gauges, SBC 3600 DD, Studs, HTT62/71/13SS, Flux 2's, Smarty, TST, AirDog 150, 6" Miters, rail capped

03-12-2008, 10:03 PM	#6 (permalink)
CrAz3D Newbie Join Date: Mar 2008 Posts: 10 CrAz3D's Truck Pics	What do you gain from removing the grid heater? I talked to 04cummins a bit on the phone yesterday about it, he said he gained about 1 mpg. Why is this (this is my first dive into the diesel world)

03-12-2008, 10:05 PM	#7 (permalink)
Austin The DieselTech Wa. Chapter President Join Date: Sep 2007 Location: Napavine, Wa Posts: 1,261 Austin The DieselTech's Truck Pics	Well the grid heater is a restriction in the airflow into the engine. Unlike gas engines, diesels don't have throttle bodies to control air flow. They are open, so the more air you can get in and out the better. __________________ Austin Jenson - Napavine, Wa 477HP/862TQ - 2003 2500 6Spd QCLB 4X4 K&N, Gauges, SBC 3600 DD, Studs, HTT62/71/13SS, Flux 2's, Smarty, TST, AirDog 150, 6" Miters, rail capped

03-12-2008, 10:09 PM	#8 (permalink)
CrAz3D Newbie Join Date: Mar 2008 Posts: 10 CrAz3D's Truck Pics	Ok, cool. Thanks

03-12-2008, 11:38 PM	#10 (permalink)
Lineman954 Cummins Fanatic Join Date: Nov 2007 Location: Swartz Creek,,, Michigan Posts: 132 Lineman954's Truck Pics	Yery nice! Thanks I'm getting one as soon as there ready, but I'm not sure yet on leaving it on in the winter yet. It gets really cold here in Michigan. I see negatives numbers quite a few times in the winter __________________ Ian 2006 2500 QC SB, 5.9L CTD, Auto, 4X4, SLT Bighorn, Patriot Blue, Muffler MIA Power Lineman, I.B.E.W. LOCAL 876..Comstock Park, Michigan

03-12-2008, 11:41 PM	#11 (permalink)
*99cumminsho* GIMME FUEL GIMME SMOKE Join Date: Jul 2006 Location: Tally, FLORIDA Posts: 1,294 99cumminsho's Truck Pics	I love Florida HEHE. I think its 60* right know. Were could i get one besides spending $80 for the ones on EBAY? __________________ 1999 4x4, auto., 4:10 gears. With not enough power i gotta have more. POWERED BY: FARM BOYS DIESEL Last edited by 99cumminsho : 03-12-2008 at 11:47 PM.