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Oct 27, 2013 | 08:54 PM

#76

AllaboutMPG

Logistics Pro

Joined: Oct 2011

Posts: 3,953

Likes: 120

From: Mcdonough, GA

Does the PCM care what oil temp or outside air temp are before turning on GP's or do they come on every time you start the vehicle? I didn't here anything about temp in the videos showing how to check them.

Oct 27, 2013 | 09:14 PM

#77

Mowing Man

Elder User

Joined: Mar 2012

Posts: 534

Likes: 0

From: Quaker Hill

Yesterday, I was told by another member that it was an engine oil temp below 130 degrees.

Oct 27, 2013 | 09:20 PM

#78

AllaboutMPG

Logistics Pro

Joined: Oct 2011

Posts: 3,953

Likes: 120

From: Mcdonough, GA

We don't have many cold days here in Gawja so I'm not up on GP's but I thought I remembered that temp played a part. Ddin't want anyone running out and changing their GPR because it didn't work only to find out they were testing it when things were too warm.

Oct 27, 2013 | 09:28 PM

#79

petrokiller

Fleet Mechanic

Joined: Nov 2010

Posts: 1,408

Likes: 249

From: Ringgold, Ga

Cold start on 90+ degree day my GPR came on just not that long. Kinda weird get in hot truck and the led burns for a few secs.

Oct 28, 2013 | 09:38 AM

#80

USMCJosh

Junior User

Joined: Aug 2013

Posts: 81

Likes: 0

I forgot to plug mine in last year on a night where it was -17 Fahrenheit. Kicking myself in the ***, I waited for the wait to start light to cycle off and the truck cranked real slow but started. Romped and romped for about 10 seconds then ran better. Still ran rough for a minute or two. Won't do that again. My buddy did that and bent a rod. Scary stuff.

Oct 28, 2013 | 09:47 AM

#81

DHamSTER

Thread Starter

Senior User

Joined: Jun 2013

Posts: 392

Likes: 0

From: Paw Paw

Romping on a cold diesel is the worst thing for it....

Oct 28, 2013 | 11:02 AM

#82

Brother Les

Cargo Master

Joined: Oct 2007

Posts: 2,712

Likes: 107

From: BoCoMo

Quote:

Originally Posted by DHamSTER

My voltage readings using the OBD II scanner were low. My truck wouldn't start either but after 6 cycles and my foot in the pedal she finally fired up. I'm replacing the glow plugs and going from there.

I have been told multiple times that the OBDII scanners DO Not Work on these trucks......

Could this be adding to the confusing?

Oct 28, 2013 | 11:11 AM

#83

DHamSTER

Thread Starter

Senior User

Joined: Jun 2013

Posts: 392

Likes: 0

From: Paw Paw

Quote:

Originally Posted by Brother Les

I have been told multiple times that the OBDII scanners DO Not Work on these trucks......

Could this be adding to the confusing?

Diehardstroker and I have the same scanner and it works just fine. Anything you can think of has a gauge on this app with this scanner.

I don't have any complaints about it.

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Oct 28, 2013 | 11:14 AM

#84

diehardstroker

Elder User

Joined: Dec 2012

Posts: 841

Likes: 0

From: Monroe, MI

It will read parameters just fine but it won't read DTC's

Oct 28, 2013 | 11:17 AM

#85

Brother Les

Cargo Master

Joined: Oct 2007

Posts: 2,712

Likes: 107

From: BoCoMo

Thank-you guys for letting me know that. I will now play with my OBDII with my truck.

Oct 28, 2013 | 11:19 AM

#86

DHamSTER

Thread Starter

Senior User

Joined: Jun 2013

Posts: 392

Likes: 0

From: Paw Paw

Yea we have to the andriod operating system to have the torque app.

Oct 28, 2013 | 03:21 PM

#87

Km1210

Elder User

Joined: Sep 2011

Posts: 659

Likes: 1

From: Millstone, NJ

Ok here is the picture. Notice how the screwdriver is touching the posts at the same time. Remember, don't put it on for too long or it will start heating up the screwdriver and posts! This method should be used temporarily for now until you can get it fixed. If you try this first thing in the morning and it fires up, the GPR is most likely the problem.

Oct 28, 2013 | 04:43 PM

#88

DHamSTER

Thread Starter

Senior User

Joined: Jun 2013

Posts: 392

Likes: 0

From: Paw Paw

Alright Kyle! Here's my results. Diehard and I based our ideas off the torque app. Well I got the volt reader tonight after work and tested it on the battery, 12.68 volts. Put the ground on the batteries ground and then put the positive on the exposed post on the relay..... Showed zeros.

Oct 28, 2013 | 05:11 PM

#89

Tact

More Turbo

Joined: Mar 2006

Posts: 582

Likes: 2

From: Eads, TN

Quote:

Originally Posted by DHamSTER

That is normal, as the relay is not powered at that point. With the positive on the exposed post, the post on the GP side (on the driver's side of the relay), have someone turn the ignition to "ON" so the WTS lights up on the dash. Then tell us what the volt meter shows.

Oct 28, 2013 | 05:12 PM

#90

DHamSTER

Thread Starter

Senior User

Joined: Jun 2013

Posts: 392

Likes: 0

From: Paw Paw

Quote:

Originally Posted by Tact

That is normal, as the relay is not powered at that point. With the positive on the exposed post, the post on the GP side (on the right side of the relay), have someone turn the ignition to "ON" so the WTS lights up on the dash. Then tell us what the volt meter shows.

The results were zeros.....