Hey I was wondering whats normal for these trucks to do glow plug wise. Mine tends to fry a glow plug every 3-4K miles. I run ac delco 60g glow plugs in my truck. Another weird thing I noticed when I’m down a glow plug is a switch for trail lights I have wired to an ignition fuse spot on my panel stops working when I have a glow plug go down. Any ideas on what’s going on?
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My cucv burns up a glow plug every 3-4K miles
- Thread starter jaako40
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cool beans
There is about 700 hundred in SS, here that have worked on these.
Your answers may be forthcoming.
Too much amps..................
There is about 700 hundred in SS, here that have worked on these.
Your answers may be forthcoming.
Too much amps..................
Do you any way of diagnosing this? I just pulled all my plugs out, thankfully none were swelled.
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Diagnosis in TM,s
ala DogHead
ala DogHead
mtperkins
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What voltage are you getting to the Glowplugs?
Started at 14v and went down to around 11v
chevymike
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It sounds like the glow plugs are staying on too long or somehow cycling too frequently. You should easily get 50,000 miles from a set. Are you still running the wiring through the resistor bank?
Yes I am, i had a spare card laying about that I know is good. I replaced my old card and gonna see how it goes.
MarcusOReallyus
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Fix known problems first. Your wiring is jacked. Fix it.
THEN troubleshoot your GP problem.
THEN troubleshoot your GP problem.
2INSANE
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theres your problem! 14v the G60s are self regulated at 10.5v tops per plug.
when 1 plug goes out it increases the voltage to the other plugs.
check the resistance on all 8 plugs
the other problem could be the glow plug resister. If that has problems then your whole system has problems.
pic below of resister
get rid of that resister and hard wire that bad boy
I agree! Fix your current wiring. Do the dog head and get a push button 50 amp switch
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Find out what is causing the issue first and replace what's broken "most likely hacked wiring . Don't start hacking things up more - keep it stock. The stock system design worked for over 35 years, why change it now.
2deuce
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I agree with keeping it stock. The one thing I would check is the connector that attaches to the glow plug. They get tired and don't fit tight with age and you get a poor connection. When this happens it is a little like a plug is going bad and feeds more volts to the other plugs.This will make the truck harder to start and you crank it longer, all things that shorten plug life.
cucvrus
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And just for the record. A C Delco 13G are the stock glow plugs. They have been working for me over 25 years. Never have many issues and replace 1 or 2 glow plugs every once in a while. Get the hard starting issue addressed and glow plug issues disappear. There is a lot more to an easy normal starting CUCV then glow plugs. Every time you crank and the longer you crank the more problems you create. Starter relay failure, glow plugs and hard on starter and batteries. Besides my nerves. Many things working as designed make the CUCV as reliable as day 1. Good Luck. 3/16" female connections will be needed for stock 13Gglow plugs. Trash the Wellmans. I used to get them for free and started turning them down.
2deuce
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Could the Wellman plugs be made better today than they were 25 years ago? I've been using them and haven't noticed any issues, that I thought were glow plug reliability.
MarcusOReallyus
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There is no reason to get a 50 amp switch. In the first place, the GPs draw a lot more than 50 amps.
If you want a manual control, just wire a lightweight (5 amps is plenty) momentary switch to ground on one side and the blue wire of the relay to the other side. Running all that current through a switch is a bad move.
2INSANE
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Not to be rude but I did not say to by pass the relay.
This 50 amp switch has worked well for me for over 12 years. I once had a flip toggle switch that accidentally got left on over night and melted the glow plugs into one of my motors.
I do agree a 50 amp switch might be over kill to engage the relay. I would strongly recommend getting a push button switch though.
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cucvrus
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Tach alert. I think yo need a diesel tach in that cluster. 
A 10 grand tach is a bit high for a diesel. But after all that work I would be sure to have a normal operating glow plug system. It would add more lights an compliment the fine work yo have done.
A 10 grand tach is a bit high for a diesel. But after all that work I would be sure to have a normal operating glow plug system. It would add more lights an compliment the fine work yo have done.
2INSANE
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Tach has adjustable settings. The signal is bad.