05 Impala 3.4 upon accellaration it bucks and jumps ,new TPS MAP Fuel pump and filter Ignition switch and still does it and also stops running at times , do you have any suggestions?

ENGINE HESITATES WHILE ACCELERATION

LOSS OF ACCELERATION

It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

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Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

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Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

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How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

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How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?

http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

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Wheel hop under hard acceleration?

http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

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2009 Chevy impala accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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Nissan Pathfinder stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Acceleration lag problem?

http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

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These details will help.

Thanks.

Usually, a map sensor and an idle control sensor can cause the rpms to jump. I had a bad map sensor and it did this. It also would die every now and then. Check your fuel pressure and make sure it is correct. It may be a fuel issue. If your check engine light is on, get it scanned at an auto part store. This may be your best bet. If not, I would look into the sensors. If you have a question, let me know. I am here to help you.

make sure your sending and return lines are correctly placed on the new pump that could be your issue of not sending gas to and from your pump.

time to buy a new van.. umm what about the alternator?

First make a set of jumper wires and jump the pump from the battery and see if it works. If it runs its the relay or the ECU,or the ignition switch.
Remove the relay and test it for B+. Then jump the terminals and see if the pump runs. If pump runs and you got B+ up to this point its the relay.
However,if no B+ at the relay means ECU not giving relay the turn on signal..
While wearing a ground wrist strap check out ECU Grounds and B+ wires for continuity from Ignition switch and other areas of interest (use shop manual)
either the switch is not telling ecu to send message to relay to turn on the pump or someone in this circuit has gone bad.

Check the fuel pressure,also change the fuel filter.check the crankshaft sensor,or replace.It sounds more like the tps sensor(throttle position sensor).It is mounted in line with the throttle axle,on the throttle horn.Of course .with out being there and checking I am just guessing.But map sensor or mass air flow sensor could also cause this.Have you checked the air filter?This will cause the problem,if it is stopped up restricting air flow to engine and mass air flow.,map sensor,and vacuums needed to run the car.If I can help,let me know.

Look for noise in the TPS circuit that can cause TCC to lock and unlock.

check your fuel pressure it should be 35 psi .fuel pump relays dont go out but check all fuses with test light there is a fuel injector fuse but most likely problem is your fuel pump!

I put a new fuel pump, fuel filter, and a fuel pump relay and the fuel pump is still not coming on. I am not getting any fuel. Can you please tell me what it might be.

Did you replace fuel filter...? If the filters all clogged up it wont matter if you changed the fuel pump cause it will burn the new one out also... Plus you use Sunnoco gas dont you??? Let me know about that and tell me if you changed fuel filter if not do that real quick.

Thanks,
Steve