Vacuum line help

[greatmizzou]

I am looking into replacing some vacuum lines but cant find them online.

 

02' 1500 5.3 ext cab lm7. 4x4

 

this is a non-egr engine

 

While chasing p0101 vacuum leak, im wondering if those power brake booster lines need to be replaced.  I see the check valve part online but no rubber tube, any ideas?

 

my brakes are spongey and that might be one issue it will resolve.  All lines, hydraulic lines at wheels, calipers , abs etc are all relatively new.  Brake fluid also bled at dealer.

 

also, need help identifying other vacuum lines that connect to intake like the fuel line.

[CamGTP]

I do not see anything listed on the GM parts website for the vacuum hose from the booster to the back of the intake manifold. You can easily just buy a new piece of rubber vacuum hose and make your own.

 

Same thing with the hose from the throttle body to the passenger side valve cover if your truck has one there.

 

I don't see a factory replacement hose either for the fuel pressure regulator. You inspect the hose for leaks pretty easy. If you do find something wrong you can replace it with new hose as well.

 

The P0101 is more of a range/circuit/performance code than a vacuum leak code. If you had a bad vacuum leak you'd likely show a few lean codes from the o2 sensors and if you had a live data scan tool, the long term fuel trims would be very positve. Meaning they are having to add in a bunch of fuel to compensate for the vacuum leak.

 

 

Past there, there aren't really any other vacuum hoses. Other leaks can be the intake piping from the MAF to throttle body, throttle body to intake gasket and the intake gaskets on the cylinder heads themselves.

 

Possible your brake feel is from a poor working booster as well

[greatmizzou]

Thank you!

[greatmizzou]

I replaced my fog lamps today and while I was doing that I took the MAF apart and cleaned it with CRC spray I also cleaned the throttlebody with cleaner spray as well. After restarting the car and allowing a dry time before first drive it was an obvious difference in engine performance and shifting appeared smoother as well.   
 

I looked closely at the heating elements before cleaning and I could see some dust or residue on at least one of the wires so that means it must've been fairly dirty or obstructed

[davester]

You might want to check your air filter, to make sure it's relatively clean and properly seated...