Need Help No power no acceleration

[George Guice]

Please help I have spent lots of money replacing COP PLUG OUTPUT SHAFT SENSOR O2 SENSOR DOWN STREAM ON RIGHT EGR BACK PRESSURE SENSOR ECT....
STILL NO POWER NO ACCELERATION RPMS WONT GO OVER 2000 ITS ACTS LIKE ITS IN LIMP MODE NO CODES NOW ONLY CODE I HAD WAS FOR O2 SENSOR I REPLACED OH AND HOW DO I FIX THE FUEL GAUGE IT READS BACKWARDS
PLEASE HELP IM DESPERATE I CANT FIGURE IT OUT
HOPELESS IN TEXAS

 

[Trainmaster]

Have you checked the battery and alternator voltage? Did you use OEM coils if you replaced them all, or Chinese imports? Have you checked the converters to see if they are clogged? What year and mileage?

 

[Yupster Dog]

Back up, take a breath, count to ten.
What year and trim is your expedition?
what was the code number for the O2 sensor?
have you checked the temperature before and after the catalytic converter while running and warmed up?

 

[WingedRider]

Melted/clogged Catalytic converter is my vote.

 

[osteodoc08]

Are you throwing parts at the codes or have you actually taken it to a mechanic?

 

[Trainmaster]

...another one-post "please help" **** that will never check the replies.