I have a 2004 Ford Explorer and it bogs down when I hit the gas if I hit the gas slow it doesn't bog down it only goes to 3000 RPMs. How to replace the mass airflow sensor and the air filter and a couple hoses thinking it was a vacuum leak. I've heard a couple posibles as in the Cadillac converter the fuel pump and the throttle position sensor can anyone help me save a ton of money.

Try cleaning the fuel injection system with seafoam and replacing the fuel filter. Look up seafoam on youtube. BTW really really really really bad idea running a vehicle on jack in gear.

Sounds like a vacuum hose problem - check the brake booster and hoses.

Assuming it does have gas in the tank, I would check the fuel pressure at the rail if its MFI or the throttle body if the injector are there.
Also, did you replace the fuel filter when you replaced the pump ?
Any chance you connected the pump to the wire that goes to the sending unit by mistake ?

CAR BOGS DOWN COULD BE FAULTY TPS SENSOR, CLOGGED FUEL INJECTORS AND CLOGGED FUEL FILTER, STOPPED UP AIR FILTER, FAULTY MASS AIR FLOW SENSOR.BEST BET IS TO HAVE CAR CODE SCAN MANY THINGS WILL CAUSE ENGINE BOG DOWN.HAVE VECHICLE CODE SCAN AND SEE IF YOU HAVE ANY FAULT CODES.MAKE CHECK TRANSMISSION FLUID LEVEL.ENGINE NEED TRANSMISSION TO FOR TORQUE AND POWER TO PUT CAR IN MOTION IF TRANSMISSION NOT WORKING OKAY IT WILL PULL DOWN ENGINE POWER.

watch these videos and you will see what you need to do. 1999 Ford Ranger Idle Air Control Replacement 1999 Ford Ranger cleaning the throttle body part 1 YouTube Testing and Replacing Throttle Position Sensor Ford Explorer you will notice a world of difference.

Having a qualified repair shop do diagnostic's is probably what you should do , rather then replacing a bunch of parts that are not needed . Testing fuel pressure an flow , engine managment sensor input's to the PCM - engine computer . Do you know what a professional scanner is ? mass air flow sensor data , fuel trims ,short an long term , are the O2 sensor's switching normally ,

003 Engine Peformance Tests Scan Data Tests

I've seen two concerns that will definitely cause this concern. The first suggestion would be to replace the spark plugs if the vehicle has 50k or more miles. Ford originally stated that the original plugs would last 100k. It was later suggested that they be replaced at 60k. I've fixed several trucks by simply (or not so simply) replacing the spark plugs. Use caution, the plugs may break when removing. A symptom of this concern is as you stated but also on wide open throttle applications. the vehicle will bog down and sputter, then finally smooth out. A spark plug concern will typically not throw code because the computer monitors changes in rpm and is relative. If all cylinders aren't firing correctly, the computer doesn't know any different and does not store a code. Also, depending on the mileage, check the fuel filter.

The second concern could be the intake manifold runner control. This is used to modify torque and is located inside of the intake manifold.

Good luck, if you can't leave four thumbs up, please ask for more information. Have a great day!

if your are expeirencing tranny slippage your tranny is on its way out...its only a matter of time before it goes... you can ride it out until it goes or u can either replace it with one from ten junkyard or get it rebuild.

First run a tank of a strong fuel system cleaner like BG-44K. If that doesn't help, clean the throttle body. If that doesn't help, take it to a mechanic.

if it has a converter on it.....it may be stopped up, but before you replace it have the fuel pump checked, as it may not be getting enough gas at higher rpms. It will start and idle fine, but starve out when you press the pedal. Have you changed the fuel filter?That will cause the same problem.....