Wasted 50 bucks!
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Elder User
Joined: Mar 2002
Posts: 549
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From: Huntsville, Alabama
Wasted 50 bucks!
Well I replaced my GPR and it did nothing to change my situation. When I start the truck in the morning the Volt meter still cycles like mad and the truck does not start any better. I suspect there is something wrong in the timer circuit. I am about at the point where I will put a moment switch on the GPR and activate the GP's on my own.
How long can you safely hold them on?
I prefer things to work properly. Is there any way to effectively test the system? This is starting to p!$$ me off.
Thanks
How long can you safely hold them on?
I prefer things to work properly. Is there any way to effectively test the system? This is starting to p!$$ me off.
Thanks
Posting Guru
Joined: Apr 2004
Posts: 1,424
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From: AZ
Had the same thing happen a few months ago... The truck started very slow
Clean and check all your battery connections!!
Get the batteries load tested to see if they are ok.
Check all the fuses under the hood.
Many people have done the manual gp switch, if you leave the switch on they will automatically turn off. But in the warmer months you dont have to cycle the gps when you dont need them
Clean and check all your battery connections!!
Get the batteries load tested to see if they are ok.
Check all the fuses under the hood.
Many people have done the manual gp switch, if you leave the switch on they will automatically turn off. But in the warmer months you dont have to cycle the gps when you dont need them
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Elder User
Joined: Mar 2002
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From: Huntsville, Alabama
Originally Posted by ForemanES
Had the same thing happen a few months ago... The truck started very slow
Clean and check all your battery connections!!
Get the batteries load tested to see if they are ok.
Check all the fuses under the hood.
Many people have done the manual gp switch, if you leave the switch on they will automatically turn off. But in the warmer months you dont have to cycle the gps when you dont need them
Clean and check all your battery connections!!
Get the batteries load tested to see if they are ok.
Check all the fuses under the hood.
Many people have done the manual gp switch, if you leave the switch on they will automatically turn off. But in the warmer months you dont have to cycle the gps when you dont need them
Posting Guru
Joined: Nov 2006
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From: Herndon KY
If you end up putting a manual switch for the glow plug then you want a spring to the off position switch, whether it be a button or spring switch I believe it is essential that you must hold it on, cause if it gets left on, or bumped on, stays on to long it can cause a failure in the structural integrity of the GP causing the tip to break off and trash the cylinder and piston causing thousands of dollars of damage.
Posting Guru
Joined: Nov 2000
Posts: 1,005
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From: Cincinnati, Ohio
Originally Posted by true blue
How would they shut off? If I run new wires to the GPR and flip a switch in the cab they should stay on until something burned up..right?
As for time, 45 - 90 seconds before you start (depending on how cold it is), another 60-90 once started to help the engine "catch" and run smoothly if it is really cold.
Dave / Believer45
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Elder User
Joined: Mar 2002
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From: Huntsville, Alabama
Has anyone installed the manual switch? Is it a pain to always have to manually hold a switch?
I thought about building my own box with a timer. I could get the parts from Radio Shack. I could probably build one with multiple settings depending on the temps outside.
Is the factory timer in the PCM?
I thought about building my own box with a timer. I could get the parts from Radio Shack. I could probably build one with multiple settings depending on the temps outside.
Is the factory timer in the PCM?
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
Originally Posted by true blue
Is the factory timer in the PCM?
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Posting Guru
Joined: Nov 2006
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From: Herndon KY
Have you pulled codes? if not try going to your local parts store bust out an OBD II code reader pull the codes and if you need somebody to look it up and we will. Maybe you will get lucky
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Elder User
Joined: Mar 2002
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From: Huntsville, Alabama
Originally Posted by cookie88
Yes, which suggests that the problem lies elsewhere. Did you get the batteries checked out?
The only code I have is for the chip that is in the truck. I guess I could pull the chip and see if that is the problem.
Playing in the Dirt
Joined: Oct 2005
Posts: 2,302
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From: Southwest Georgia
To test your batteries, just drive your truck to your favorite auto parts store. They can load test them with them in the truck. They should disconnect both batteries and test each one individually. Most will do this for free.
Chips have been known to go bad.
Chips have been known to go bad.
Playing in the Dirt
Joined: Oct 2005
Posts: 2,302
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From: Southwest Georgia
Another thought, have you checked: the Valve Cover Gasket connectors; the UVC (Under Valve Cover) wiring; the glow plugs themselves? You may have problems in one or more of these areas.
To determine if it is the timer cycling on and off, check the power on the two small wires going to the GPR. With the inginition off there should not be power. With the ingnition on you should have constant power.
If with the ignition on you have on-off-on-off power, then it is indeed your timer not supplying constant power to the GPR. But, if you have constant power, something else is causing your GRP to trip and cycle.
To determine if it is the timer cycling on and off, check the power on the two small wires going to the GPR. With the inginition off there should not be power. With the ingnition on you should have constant power.
If with the ignition on you have on-off-on-off power, then it is indeed your timer not supplying constant power to the GPR. But, if you have constant power, something else is causing your GRP to trip and cycle.
I will have to try that tomorrow.