What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

Changed the GP's but.....

stoney126

stoney126

1/2 ton status
Joined
Jun 2, 2005
Posts
1,458
Reaction score
0
Location
napa,CA
but I still need to have em on for at least 15 seconds and thats with it at 100 degrees outside. I got the quick heats I think from Kelly's diesel or something. Anyway they still take at least 15 seconds to to get to tuen over. Now considering the state of decay the rest of the wiring and hoses on the truck
, would it be safe to say the wires to the GP's are no good? The outer slleve on the wires is kind of brittle and making me think the GP's arent getting the juice the need. Thanks all for any info
 
Then I would go ahead and replacing the wiring. What is the status on the batterys and does the motor crank over fast or does it seem sluggish on cranking? btw ask over thedieselplace.com also.
 
Battery's are good. Replaceed the battery wires and it cranks over fast but still need a some time before it turns over. When its still warm I can turn it right over no problem its just cold starts need some GP time
 
I would type up some troubleshooting tips but i'm on a laptop here in greece leeching off someone's wifi and i ahve to lay on teh bed to get the singal,

Do the glow plugs glow red when you test them? (remove one from engine and test it.
 
oh good thinking. It should take like 8-10 seconds to get glowing red?
 
Quick heats should get as hot as they're going to in about 5 seconds...

Rene
 
ok pulled th GP closest to the fornt of the truck on the driver side. Does th GP need to be grounded? Because Nothing happened and was cool to the touch. I used a test light on the wire connection and it lit up, Not a blinding light mind you but the was some juice.
 
using my cheapy mulitmeter I think I have 5 volts going though the wire. But to be honest I dont even know If I have it on the right setting:o:haha:
 
Yep, the body of the glow plug has to be grounded (the threaded part, not the element), and it has to be getting as close to full battery voltage as possible. When you cycle the glow plugs they should turn bright red at the tip within a few seconds if they are working properly.

To check the voltage, set the meter for DC voltage measurement (Often a V with a solid line above it, with a second dashed line above the solid line, a squiggly line like ~ indicates AC voltage) within an appropriate range and set the black lead onto a solid ground (top of the battery is best if your leads are long enough)

Remove the wire that runs to the glow plug you are checking, and hook the other lead onto that wire. With the glow plugs on, you should be seeing close to battery voltage on that wire. Check all of your glow plug wires to ensure none of the fusible links have fried (those wires are actually the fusible links themselves).

Hooking a light up between the wire and the glow plug won't give you a particularly good idea of how well the plug is working, you need to remove the glow plug and visually see it turn red hot to make sure it is working properly.

If all your plugs glow red at the right position on your glow plugs (near the tip of the element), and all of them have a proper voltage supplied through them, and a good solid ground to dissipate it to, your glow plugs should be working properly.
 
Jumper cables work good to test GP's. Black on the threaded part, touch the spade connector with the red...watch for glow. Don't touch the black and red though ;)

Rene
 
ok pulled a plug, hooked up cables and in 4 seconds glowing red. I connected the GP wire to the spade and after 15 seconds it got hot but no glowing red.

So could it be the wires? or the connectors im using? I got em at osh so maybe I need a different/better type?
 
I dont DD mine and havent messed with my cucv in a....few months...*sigh* anyway, those are the same connectors I used and mine will glow red in 6-7 seconds. I forget what the number is on my gp's but they are the ones that wont swell, but take a little longer to glow
 
Replace all the glow plug wires. If they are in the condition that are in go ahead and replace em.

I will be back in Denver in 23 hrs from now and will have access to my diesel tech stuff, So if you need wire diagrams I can provide them and such. (Once I replace the computer that blew up...) (this will be done Thursday or Friday).
 
If you only have 5 volts at the plug you need to go backwards from the glow plug to find out where you are losing 7 volts at. Once you find the bottleneck you can fix it...
 
You must log in or register to reply here.

Latest Posts

Top Bottom