Problems replacing fuel pump

What color smoke? Black=too much gas, white= head or head gasket, blue= oil. Check your oil dipstick, you may find gas in the oil from cranking the engine without it starting, a new oil filter and fresh oil is needed, also was the fuel pressure tested after the fuel pump was installed? You may need a new fuel pressure regulator. Or the return line is blocked.
Fuel pump pressure is 30-45psi with key on engine off. Fuel pressure and regulator test:
FUEL PRESSURE 1. Visually inspect fuel system, including fuel lines, connections, injectors and electrical connections. Ensure Inertia Fuel Shutoff (IFS) switch is not tripped. Check condition of battery and fuses. Ensure fuel level in tank is sufficient. 2. Turn ignition off. Release fuel pressure. Install fuel pressure gauge. Start engine and increase engine speed to 2500 RPM. If engine will not start, cycle ignition switch several times. Measure and record fuel pressure. For fuel pressure specifications, see FUEL PRESSURE SPECIFICATIONS article. If fuel pressure is within specification, go to next step. If fuel pressure is not within specification, go to CIRCUIT TEST HC in TESTS W/CODES - 2.0L article for fuel system diagnosis. 3. With fuel pressure gauge still installed, cycle ignition switch on and off several times. Record fuel pressure. If fuel pressure is at least 25 psi (172 kPa) after one minute with ignition off, system is capable of maintaining fuel pressure. If fuel pressure is not at least 25 psi after one minute with ignition off, check for leaking fuel injectors or fuel pressure regulator. WARNING: ALWAYS relieve fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components. See FUEL PRESSURE RELEASE .
https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
Go here and checkout our video.

REMOVAL

Perform the fuel pressure release procedure.
Remove rear seat cushion.
Remove plastic grommet from floor pan.
Disconnect fuel pump module electrical connector.
Disconnect fuel and vapor return tubes from fuel pump module by compressing tabs on both sides of each nylon push connect fitting and easing the fuel line out of fuel pump module.
Turn fuel pump locking retainer ring counterclockwise using fuel tank sender wrench and remove fuel pump locking retainer ring.
Remove fuel pump module and cover fuel pump module opening in fuel tank.
NOTE: After fuel pump module removal, immediately cover fuel pump module opening in fuel tank in order to prevent fuel system contamination.

Remove fuel pump module O-ring seal and discard.

Service and Repair

WARNING: Do not smoke, carry lighted tobacco or open flame of any type when working on or near any fuel related component. Highly flammable mixtures are always present and may be ignited, resulting in possible personal injury.

CAUTION: Fuel supply lines will remain pressurized for long periods of time after engine shut down. This pressure must be relieved before servicing of the fuel system is begun. A valve is provided on the throttle body for this purpose. Remove the air cleaner and relieve system pressure by using Rotunda pressure gauge tool T80L-9974-A or equivalent and drain the system through the drain tube.

REMOVAL

1. Perform the fuel pressure release procedure.
2. Remove rear seat cushion.
3. Remove plastic grommet from floor pan.
4. Disconnect fuel pump module electrical connector.
5. Disconnect fuel and vapor return tubes from fuel pump module by compressing tabs on both sides of each nylon push connect fitting and easing the fuel line out of fuel pump module.
6. Turn fuel pump locking retainer ring counterclockwise using fuel tank sender wrench and remove fuel pump locking retainer ring.
7. Remove fuel pump module and cover fuel pump module opening in fuel tank.

NOTE: After fuel pump module removal, immediately cover fuel pump module opening in fuel tank in order to prevent fuel system contamination.

8. Remove fuel pump module O-ring seal and discard.

INSTALLATION

1. Clean fuel pump module mounting flange and fuel pump module mounting surface and O-ring seal groove on fuel tank.

NOTE: When cleaning fuel pump module mounting surface on fuel tank, use caution to prevent any foreign material from entering fuel system.

2. Apply a light coat of Premium Long-Life Grease meeting Ford specification ESA-M1C75-B on a new O-ring seal to hold it in place and install it into the O-ring seal groove on the fuel tank.
3. Install fuel pump module carefully to ensure that filter is not damaged. Ensure that locating keys are in keyways and O-ring seal remains in place.
4. Hold fuel pump module in place and install fuel pump locking retainer ring finger-tight. Ensure that all locking tabs are under fuel tank lock ring tabs.
5. Secure fuel pump locking retainer ring by rotating clockwise using fuel tank sender wrench until fuel pump locking retainer ring rests against stops.
6. Connect fuel and vapor return tubes to fuel pump module.
7. Connect fuel pump module electrical connector.
8. Install plastic grommet in floor pan.
9. Install rear seat cushion.
10. Install fuel pressure gauge.
11. Turn ignition switch to RUN position for three seconds repeatedly (5 to 10 times) until pressure gauge reads at least 270 kPa (30 psi). Check for leaks at fittings.
12. Remove pressure gauge, start engine and recheck for leaks.
There you go.

The bottom part of the seat, is in place simply by two plastic clamp things, just have to pull and fiddle around with them for it to release, they are toward the front and sides of the seat. Now that it's out of the way, follow the rest of the steps below..

FUEL PUMP
Removal
Tips Click a link to view tip
Tech1FUEL LINES AT MODULE

Release fuel pressure. Remove rear seat cushion. Remove plastic grommet from floor pan. Disconnect fuel pump module connector.
Clean area to prevent contamination in fuel tank.

****Disconnect fuel lines from fuel pump module by squeezing tabs on fuel line together and carefully pulling fuel lines from fuel pump module. *****

The lines are difficult to remove but they will pry out as long as the tabs are pushed in. Use a large needle nose plier, straddle the line fitting use a pry bar
under the pliers and pry upward to pop out the lines.

Using Fuel Tank Sender Wrench (D84P-9275-A), turn retainer ring counterclockwise and remove retainer ring. Remove fuel pump module and cover opening.
Installation
Ensure fuel pump and mounting surface is clean. Lubricate new "O" ring with suitable grease. Carefully install fuel pump module into fuel tank. To complete installation, reverse removal procedure. Pressurize fuel system and check for leaks.

Disconnect the fuel lines from the fuel pump by compressing the tabs on both sides of each nylon push connect fitting and easing the fuel line off the fuel pump. Let me know if this helps you.

Joe

Are they the quick connect lines? If so, there should be a horse shoe shaped clip that holds it in place. Remove the pin and it should disconnect.

Removing access hole under rear seat will not help. This only allows access to the wiring and fuel line for returnless system. Have to remove the fuel tank if you are replacing the fuel pump.

Is there any codes in the system? We need them

sounds like more of a vacuum leak than any of the other parts you through at it.

You should have someone look at it for you as it sounds like you are frustrated. Get a second opinion then you can repair it with confidence

Roy