CUCV early Glow Plug burn out - What is the cause?

[Commander5993]

I got the answer to getting that steel line on...don't tighten the pump to the block...just start the bolts and start the steel line at the same time...get it screwed on almost all the way then tighten the bolts to the block. If need be I think there's a stud that holds the steel line tight to the block...can pop that loose too. As far as the glow plug card you don't need to remove the card or do much other than wire a ground switch to the second wire in the gp harness...can get the wait light if you hit the third wire too. Push button in the cig lighter spot.

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Thanks so much for the tips, now that you brought that up I think that I may have done that originally with the line. Also the rod didn't fall out this time, I even felt in there a bit and didn't feel anything. But I thought it was just my memory crossing over to something else I had worked on.

That pushrod can't "pop out" and go down into the engine can it??

It may have just been stuck in there with some oil build up or something and was enough to keep it from falling out. Guess I'm going to have to take the pump back off now to find out. Which I'd have to take it loose to install the line anyway.

 

[WWRD99]

Thanks so much for the tips, now that you brought that up I think that I may have done that originally with the line. Also the rod didn't fall out this time, I even felt in there a bit and didn't feel anything. But I thought it was just my memory crossing over to something else I had worked on.

That pushrod can't "pop out" and go down into the engine can it??

It may have just been stuck in there with some oil build up or something and was enough to keep it from falling out. Guess I'm going to have to take the pump back off now to find out. Which I'd have to take it loose to install the line anyway.

I don't think I've ever done a pump where that shaft didn't fall down into the cover pocket. I always pop it out and cover it in grease. I hope it did stay up, though, because you probably bent the pump bolting it together. Thing is you'd really have to ramajammit in with the block bolts...that steel line is a simple 3/8 brake line. Can make them pretty easy. Doing these on the ground is tough...just high enough to be hard to reach. Luckily my son and I have that part down pat since we replaced all of ours and got the last one to 20 minutes.

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[Commander5993]

Hey all, been a few months. been dealing with health issues and etc.

anyway, worked on this fuel system again today. I got the pump on last week after 3 previous days wasted on it. But screwed up the first new hardline I bought. So bought another piece of 3/8" brake line and tried again. Had that fixed this time... until I got tee'd off and went to rip out a hose, and of course it caught the line and kinked it. i dont expect anything less these days. I'll fix it again.

But I have another question. Either I am completely thinking of this @s backwards, or I'm right and it ain't working.

After getting the hard line installed and connected, and changed truck batteries as the others were 4+ years old and getting weaker. I removed pink wire off injection pump and cranked the engine. Reinstalled pink wire, as I've done before, cranked but nothing. Did that several times, nothing. Then I opened the vent on the fuel filter, cranked truck, no fuel coming out drain hose. Did that a few times, with vent closed and open, never got fuel. So Installed a new fuel filter, even though I was nearly certain that wasn't the issue because the filter wasn't that old. But just to eliminate it, replaced. Still got nothing.

So this is when I got the idea of using my vac pump to see if it would pull fuel, because I started thinking I must have screwed up the new lift pump. And on the vac pump, I got nearly 20 inches of vacuum, but no fuel.

I opened the drain vent on the fuel filter, then suddenly got a spurt of fuel. Pumped vac back up, removed drain hose from fuel filter housing, used the limp part of a rubber glove and held it up to drain port. Opened the vent, and it SUCKED the glove up to the drain port hole. Which... it should have blown air out, right?

So am I pulling a vac on the wrong hose or what? See photo, that hose is connected to fuel filter housing and normally is connected to the hard line that screws into the lift pump. That is the inlet hose isn't it? And not the return line??

Further, if this is the correct line, and yet I can't get any fuel... that means the issues is in the tank doesn't it.....

I just replaced the entire fuel tank, sending unit, sock, hoses, and etc about 3 years ago.

 

[WWRD99]

Hey all, been a few months. been dealing with health issues and etc.

anyway, worked on this fuel system again today. I got the pump on last week after 3 previous days wasted on it. But screwed up the first new hardline I bought. So bought another piece of 3/8" brake line and tried again. Had that fixed this time... until I got tee'd off and went to rip out a hose, and of course it caught the line and kinked it. i dont expect anything less these days. I'll fix it again.

But I have another question. Either I am completely thinking of this @s backwards, or I'm right and it ain't working.

After getting the hard line installed and connected, and changed truck batteries as the others were 4+ years old and getting weaker. I removed pink wire off injection pump and cranked the engine. Reinstalled pink wire, as I've done before, cranked but nothing. Did that several times, nothing. Then I opened the vent on the fuel filter, cranked truck, no fuel coming out drain hose. Did that a few times, with vent closed and open, never got fuel. So Installed a new fuel filter, even though I was nearly certain that wasn't the issue because the filter wasn't that old. But just to eliminate it, replaced. Still got nothing.

So this is when I got the idea of using my vac pump to see if it would pull fuel, because I started thinking I must have screwed up the new lift pump. And on the vac pump, I got nearly 20 inches of vacuum, but no fuel.

I opened the drain vent on the fuel filter, then suddenly got a spurt of fuel. Pumped vac back up, removed drain hose from fuel filter housing, used the limp part of a rubber glove and held it up to drain port. Opened the vent, and it SUCKED the glove up to the drain port hole. Which... it should have blown air out, right?

So am I pulling a vac on the wrong hose or what? See photo, that hose is connected to fuel filter housing and normally is connected to the hard line that screws into the lift pump. That is the inlet hose isn't it? And not the return line??

Further, if this is the correct line, and yet I can't get any fuel... that means the issues is in the tank doesn't it.....

I just replaced the entire fuel tank, sending unit, sock, hoses, and etc about 3 years ago.

Pull a vacuum from the bleeder on top of the filter housing, not the hoses. The plastic plug on top, unscrew that and hook to the output on the left side on top. Or just crack it and turn over the motor. It takes a bunch of cranks.

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[Commander5993]

Pull a vacuum from the bleeder on top of the filter housing, not the hoses. The plastic plug on top, unscrew that and hook to the output on the left side on top. Or just crack it and turn over the motor. It takes a bunch of cranks.

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I forgot to say that I did try to pull a vacuum off the drain hose, with the drain/vent cap open of course. Didn't get anything there either.

Tomorrow I'll unscrew the plug on top and try to pull from there. And yeah, I know it takes some cranking, I've done it a number of times before through the years. But couldn't get anything today no matter what I did.

 

[WWRD99]

I forgot to say that I did try to pull a vacuum off the drain hose, with the drain/vent cap open of course. Didn't get anything there either.

Tomorrow I'll unscrew the plug on top and try to pull from there. And yeah, I know it takes some cranking, I've done it a number of times before through the years. But couldn't get anything today no matter what I did.

I don't think you'll pull anything out of the bottom drain as it's for water not fuel. The top one is a direct port from the lift pump to the filter

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[Commander5993]

I pulled from the top right line on the fuel filter, which is the line that goes to the lift pump. Is that what you're talking about?

I also tried to pull from the vent port i guess you'd call it, where normally you can open to release air until fuel begins flowing. Which that port is on the top left side of the fuel filter. Got nothing on either port though.

 

[87cr250r]

Rubber hose can make a perfectly acceptable long lasting replacement IF you get the right materials. SAE J30R9 and 10 hoses will last indefinitely in.