Bleeding air out of fuel line

Because the vehicle has ABS and air in it, it must be bled from the caliper upwards using a pressurized bleeding bottle.

https://www.aa1car.com/library/abs_bleeding.htm

Some also need a scan tool according to some of the articles

This is specific to the Equinox

https://www.justanswer.com/chevy/c5bdh-2012-chevy-equinox-soft-peddle-i-ve-replaced.html

https://www.google.com/search?q=2012+Chevrolet+Equinox%2C+bleeding+brake+lines

..

You have provided little information to go on here JBM but some diesel engines (depending on year, make, model) require the injectors to be manually bled to remove the air in trapped in the fuel delivery lines after running of of fuel.

Check the (owners manual) to see if your engine is self bleeding.

we dont have this engine here, USA.
but i have the WG jeep book,
starting page 12 , chapter 14


FUEL INJECTION PUMP BLEEDING
(1) If the fuel injection pump has been replaced,
air should be bled at the overflow valve before
attempting to start engine.
(a) Loosen the overflow valve (Fig. 18) at the
rear of the injection pump.
(b) Place a towel below the valve.
WARNING: WHEN CRANKING THE ENGINE TO
BLEED AIR FROM THE INJECTION PUMP, THE
ENGINE MAY START. PLACE THE TRANSMISSION
IN NEUTRAL OR PARK AND SET PARKING BRAKE
BEFORE ENGAGING THE STARTER MOTOR.
CAUTION: Do not engage the starter motor for
more than 30 seconds at a time. Allow 2 minutes
between cranking intervals.
(2) Crank the engine for 30 seconds at a time to
allow air trapped in the injection pump to vent out
the fuel injector drain tubes. Continue this procedure
until the engine starts. Observe the previous WARNING
and CAUTION.
(3) Tighten overflow valve.
HIGH-PRESSURE FUEL LINE BLEEDING
WARNING: THE INJECTION PUMP SUPPLIES HIGH-
-PRESSURE FUEL OF APPROXIMATELY 45,000 KPA
(6,526 PSI) TO EACH INDIVIDUAL INJECTOR
THROUGH THE HIGH-PRESSURE LINES. FUEL
UNDER THIS AMOUNT OF PRESSURE CAN PENETRATE
THE SKIN AND CAUSE PERSONAL INJURY.
WEAR SAFETY GOGGLES AND ADEQUATE PROTECTIVE
CLOTHING AND AVOID CONTACT WITH
FUEL SPRAY WHEN BLEEDING HIGH-PRESSURE
FUEL LINES.
WARNING: DO NOT BLEED AIR FROM THE FUEL
SYSTEM OF A HOT ENGINE. DO NOT ALLOW FUEL
TO SPRAY ONTO THE EXHAUST MANIFOLD WHEN
BLEEDING AIR FROM THE FUEL SYSTEM.
Bleed air from one injector at time.
(1) Loosen the high-pressure fuel line fitting at
the injector (Fig. 19).
(2) Crank the engine until all air has been bled
from the line. Do not operate the starter motor
for longer than 30 seconds. Wait 2 minutes
between cranking intervals.
(3) Start the engine and bleed one injector at a
time until the engine runs smoothly.

end quote.
pump timing is on next page
or tank filter line priming before. above.

check for a loose fuel line hose/connection that is allowing the fuel to drain back over time and filling the line with air that is causing a air lock when trying to start

Still air in system, sounds like the master cylinder has ran dry during the bleeding process, pumping more air into system. The lines running to the rear brakes are long, so you must bleed the fluid out the bleed screw in the rear 10+ times each side. Bleed, bleed, and bleed some more, keep bleeding untill that pedal feels good.

for the pedal to go to the floor there is still air in the brake system. Start again starting from the longest line bleeding each in turn to the shortest line . make sure you have adjusted up the rear brakes before bleeding as every time you press on the pedal the shoes expand right out and when you take your foot off the pedal the shoes go all the way back in. adjust them manually and do not rely on the self adjuster as it only adjusts on wheel movement

Fuel Pressure at motor with a gauge

No bleeding to do

Once the pump comes on you have fuel pressure

Once the computer sees a crank sensor signal the injectors
pulse & all air is blown out into the cylinders

bleeding hydraulic lines is tricky. get someone to help you. get a big bottle of brake fluid, and don't be stingy.it takes a lot of pumps to pass air from front to back of truck. start at the furthest wheel and bleed first. use a clean water bottle punch 1/4' hole in cap use 2 ft of clear 3/16 tubeing, stick it in the cap and submerge in the water bottle which you will fill 1/3 with brake fluid. by submerging the end of the tube this will allow air to bubble out, but it will **** fluid back.you can see the air bubbles come out. All the while someone keeps an eye on the mastercylinder, do no let the mastercylinder run out or you will pump new air in....keep toping off and pass plenty of brake fluid. You will end up with no air and brand new brake fluid

Maybe the system needs to be bled, an air pocket somewhere?? Tey bleeding the fuel system.

This is NOT good! You can try bleeding the fuel system first. More than likely, air is trapped in the fuel lines, injector, and injector lines. Bleed at the fuel pump, (On the fuel pump to injector pump side), then the injector pump, then each line.

(You have to loosen the fitting to each line to each part, then when the air is bled out, and fuel comes through steadily, close it)

I also suggest an attorney to resolve the problem, as there may be damage. Pistons could have holes in them. Do a compression check.

Usually diesel's have 16:1 ratio compression. Today's gasoline engines have anywhere from 8:1, to 8.5:1, to maybe 9.0:1, (Maybe)

I'm willing to bet though, that you just have air in the system, and it needs to be fully bled out.
There is NO half stepping on this!
You have to start at the source, loosen each fitting, bleed the air out, and continue on down the line.