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Author Topic: 1.6 NA not getting fuel  (Read 2564 times)

Reply #45October 24, 2017, 01:41:15 pm

fatmobile

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Re: 1.6 NA not getting fuel
« Reply #45 on: October 24, 2017, 01:41:15 pm »
What did you use for clear lines?
 I use 1/4" stuff and sometimes slide a short piece of 3/8" rubber hose over it before putting it on the barb. I slide this up over the barbed area and if it still leaks I put a hose clamp on the rubber piece.

 So occasional air bubble in the line going into the pump while running, right? That could just be some of the air that's stored in the filter. It doesn't go through a diesel soaked paper element very well but sometimes makes it through.

Still a little confused on where the air appears and when. Right after startup? Any air in the lines before startup?
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with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #46October 27, 2017, 09:23:31 pm

UncleDelicious

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Re: 1.6 NA not getting fuel
« Reply #46 on: October 27, 2017, 09:23:31 pm »
One of the straps on the fuel tank broke and now the tank has a steady little leak. I think I'll just drain the tank and pull it out to take a better look around that

As for the clear line, it's 5/8" clear fuel line from the auto parts store

The air appears in the lines after running for a hot minute

Reply #47October 27, 2017, 10:53:03 pm

ORCoaster

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Re: 1.6 NA not getting fuel
« Reply #47 on: October 27, 2017, 10:53:03 pm »
Wouldn't that be a 5/16" line there?
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Reply #48October 28, 2017, 04:31:52 pm

UncleDelicious

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Re: 1.6 NA not getting fuel
« Reply #48 on: October 28, 2017, 04:31:52 pm »
Yup, 5/16" not 5/8".

Typographical error, I do not have enormous fuel lines in my engine bay

Reply #49October 28, 2017, 08:34:05 pm

ORCoaster

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Re: 1.6 NA not getting fuel
« Reply #49 on: October 28, 2017, 08:34:05 pm »
Kind of what I thought but you never know about these high HP/ Big Boost fellas.  They might enjoy that type of input of fuel.  The tank would have to be huge to support it but then, you just never know ...
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Reply #50October 31, 2017, 04:38:34 pm

fatmobile

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Re: 1.6 NA not getting fuel
« Reply #50 on: October 31, 2017, 04:38:34 pm »
Hmmm, 1/4 ID line always works great for me,.. except the MK2s have a smaller barb on the output banjo.

What does a hot minute mean? When you rev it bubbles appear,.. then disappear while reving?
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #51April 28, 2018, 04:57:56 pm

UncleDelicious

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Re: 1.6 NA not getting fuel
« Reply #51 on: April 28, 2018, 04:57:56 pm »
Winter seems to be over so I'm back trying to get this figured out.

I replaced the fuel tank since my old one was leaking and I'm trying to keep the air out of the system.

I primed the injection pump and did my best to bleed the air out.

The idle is rough and the throttle doesn't do a whole lot. It seems like the fuel isn't coming up through the feed, but it is definitely creeping up the return line from the tank.

I took a video of how it idles and how the throttle is affecting it. You should be able to hear how it sounds in the video

https://www.youtube.com/watch?v=o5C_j6LY1dk


Reply #52April 28, 2018, 11:09:02 pm

ORCoaster

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Re: 1.6 NA not getting fuel
« Reply #52 on: April 28, 2018, 11:09:02 pm »
UncleD,

Remind us all since it has been awhile, did you have the pump apart for a rebuild?  It almost looks to me like you are not getting the fuel collar to move on the shaft.  How about increasing the fuel screw on the top of the pump.  Just screw it in about a half a turn then try flipping the throttle, if no results turn in another half turn and try it.  Go up to two full turns in, 4 times and you should have tons of fuel being allowed to go in.

Maybe another video of the fourth time trying? 

You have to have pressure internally to get it running as it is so that leads me to think it is in the second, high pressure side, just not getting enough. 


Now Own 1981 Caddy as the NEW DISTRACTION to all that is around me.  Project Away!

Reply #53April 29, 2018, 06:57:58 am

UncleDelicious

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Re: 1.6 NA not getting fuel
« Reply #53 on: April 29, 2018, 06:57:58 am »
I did not have the pump apart.

When I bought the truck I was told the engine was rebuilt, but I do not know for sure and I do not know if that included the pump.

The fuel screw is the horizontal one parallel with the throttle cable?

Reply #54April 29, 2018, 11:08:41 am

Dakotakid

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Re: 1.6 NA not getting fuel
« Reply #54 on: April 29, 2018, 11:08:41 am »
Check orientation of "in-and-out" bolts/attachments on the fuel supply on pump.
Keep rocking, Comrade.
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Reply #55April 29, 2018, 01:42:15 pm

UncleDelicious

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Re: 1.6 NA not getting fuel
« Reply #55 on: April 29, 2018, 01:42:15 pm »
What is the proper orientation?

Reply #56April 29, 2018, 01:53:33 pm

ORCoaster

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Re: 1.6 NA not getting fuel
« Reply #56 on: April 29, 2018, 01:53:33 pm »
Fuel screw is the one with the collar on it just above the four delivery valves on the back of the pump.  The pulley end is the front.

If you remove the out bolt you should see a screen like think in the hole when you flip it upside down.  The IN bolt has nothing like that, just a straight hole down and one across the provides passage of fuel from the banjo bolt to the inside of the pump.

Now Own 1981 Caddy as the NEW DISTRACTION to all that is around me.  Project Away!

Reply #57April 29, 2018, 02:52:12 pm

UncleDelicious

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Re: 1.6 NA not getting fuel
« Reply #57 on: April 29, 2018, 02:52:12 pm »


Is this the correct screw to adjust?

It was tightened all the way to the collar already. Should I try to remove the collar to tighten it down a turn or 2?

Reply #58April 30, 2018, 09:16:23 pm

UncleDelicious

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Re: 1.6 NA not getting fuel
« Reply #58 on: April 30, 2018, 09:16:23 pm »
I played with the fuel screw a little but ended up leaving it where it originally was.

I have figured out that it runs and revs fine while the feed line is still full, but as it continues to run, the fuel in the feed line gets used up and it isn't pulling enough to keep the line full. So it gets emptied out and filled with air while fuel trickles down out of the filter into the IP and it starts running rough and having no throttle response.

My next question here is: how do I get the feed lines to stay full of fuel and continue to remain full? Because it seems if I can keep the fuel flowing well through there it will be back to running and driving again

Reply #59April 30, 2018, 11:00:51 pm

ORCoaster

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Re: 1.6 NA not getting fuel
« Reply #59 on: April 30, 2018, 11:00:51 pm »
When was the last time you changed your fuel filter?  You might have gunk in the line from the tank to the filter as well.  Nothing a little bit of air blown down that line wouldn't help.  Just take off the fuel cap first so you don't pressurize the tank.
Now Own 1981 Caddy as the NEW DISTRACTION to all that is around me.  Project Away!

 

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