What did you do to your NBS GMT800 Tahoe/Yukon Today?

[wyldhog]

I installed a oil catch can a bit ago and now I have this noise like an air leak. If I pinch one of the tubes it stops so pretty sure its from the can but everything is tight and when you put my hand around trying to "plug" the leak and listen for a change I can't. So my question is does yalls do this also?

I recorded the noise but the file is too big...

I think the hissing noise may be a common things with the catch cans. See if this helps:

 

[Scottydoggs]

my can dont make any noise. if you hear it thats a vac leak. if large enough the engine will surge at idle. spray some brake cleaner at it and the hose ends. if you have flammable spray the engine rpm will go up, non flammable it will bog.

 

[latvius]

I think the hissing noise may be a common things with the catch cans. See if this helps:

Yeah that does help thanks!

 

[latvius]

my can dont make any noise. if you hear it thats a vac leak. if large enough the engine will surge at idle. spray some brake cleaner at it and the hose ends. if you have flammable spray the engine rpm will go up, non flammable it will bog.

Yeah I can try that but the guy in the vid didnt have a leak and it makes noise. I kinda think it's like he found out it's just the noise of the air passing through the hose. That said I could be wrong so I'll check some more for a leak.

 

[ScottyBoy]

I didn't take photos but did use this screenshot of a video to determine where to cut. If you have captain's chairs as I do the bolt shown in the photo won't be present.

I dont understand why so many people hack up their floors like this. Some people do it because they buy cheaper pumps that fail every 2-3 years, and they want it easier to replace. To each his own, I guess. When my fuel pump went out, I just forked out the cash for an OEM AC Delco fuel pump, and dropped the tank. That was in 2017, so 8 years ago now. Hopefully, that pump lasts 17 years just like the original pump did. I'd rather spend the money on a good OEM fuel pump, and drop the tank ONCE instead of cutting the floor and replacing the pump every 2-3 years with a $60 Amazon fuel pump.

 

[Scottydoggs]

Yeah I can try that but the guy in the vid didnt have a leak and it makes noise. I kinda think it's like he found out it's just the noise of the air passing through the hose. That said I could be wrong so I'll check some more for a leak.

if you can hear the vacuum through the hose buy better hoses. i got that cheap ass can off amazon and the hose that comes with it is so thin, no way i was using it.

 

[latvius]

if you can hear the vacuum through the hose buy better hoses. i got that cheap ass can off amazon and the hose that comes with it is so thin, no way i was using it. View attachment 452899

Yeah I replaced those hoses with some of this. I did some research and it is a common problem, some say it might be the length of the hose that makes the difference, I have a pretty long run. If it is just acoustics I may put a hose around the installed hose to quiet it.

 

[Scottydoggs]

Yeah I replaced those hoses with some of this. I did some research and it is a common problem, some say it might be the length of the hose that makes the difference, I have a pretty long run. If it is just acoustics I may put a hose around the installed hose to quiet it.


View attachment 452900

your still using the pcv valve right? with out that regulating the flow you might hear it sucking the air through then.

 

[latvius]

yes did not remove it

your still using the pcv valve right? with out that regulating the flow you might hear it sucking the air through then

 

[Roilux]

I dont understand why so many people hack up their floors like this. Some people do it because they buy cheaper pumps that fail every 2-3 years, and they want it easier to replace. To each his own, I guess. When my fuel pump went out, I just forked out the cash for an OEM AC Delco fuel pump, and dropped the tank. That was in 2017, so 8 years ago now. Hopefully, that pump lasts 17 years just like the original pump did. I'd rather spend the money on a good OEM fuel pump, and drop the tank ONCE instead of cutting the floor and replacing the pump every 2-3 years with a $60 Amazon fuel pump.

I tend to agree with you as a few Youtube videos gave me the williies.

However, a Delphi FB0810 fuel pump replaced the original Delphi pump at 20 years use and 170k. That's how I roll, quality OEM parts whenever available, and why I purchased a genuine GM E-fan wiring harness from you and not an ill-engineered aftermarket setup.

Going in through the floor was both expedient and effective. May the rest of the vehicle last as long as this fuel pump should.

To boast a bit, my automotive body and paint skills banished any appearance of an ugly hack. A garage based restoration of a '76 Bronco for my father is attached. The passenger side floorboard was also removed before welding up new metal.