Air flow sensor problems

Air flow sensor: Air flow sensor. It detects how much air is flowing into the engine.
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Acceleration loss under load

Ford F-150 2005 F150 5.4 3valve 100000 miles
Has power with overdrive off but hesitates and Boggs down when going up hill with overdrive on and acts sluggish when cruising at low speeds with overdrive on. When you step on the gas halfway to the floor or more it Boggs way down before accelerating. I have replaced all 8 coils all 8 spark plugs fuel filter both evap valves and the fuel pump control module and cleaned the mass airflow sensor and dumped fuel system cleaner in the tank.
Buck from United States 8 years ago  
BU
11 reports 
rthaem511 from United States 8 years ago
Sounds like the cat I'm going threw the exact same problem right now trying to figure out how to bypass the o2 sensor on the cat minna a 5.4 01 ford expedition
Chaz from United States 7 years ago
I went through this problem for about 9 months. Replaced icm, computer, disputer, coils, plugs , wires, tps, maf, egr , fuel pressure regulator,. Last thing replaced o2 sensor fixed the total thing. If I was to start over I would get the air right, o2 sensors and maf. Then check fuel pressure, and go from there. Go to a mechanic that can read the obd1 computer to diaganose it better. Good luck
Diesel Jerry from United States 6 years ago
If you have the 4R70E or W transmission there’s an issue with the design of the drum in the transmission and the valves sticking in the valve body. They make a better designed drum to fix the problem.
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Runs like poo one minute then ok the next

Ford F-150 2008 Fx4 v8 0 miles
Ok so ill be driving amd everything will be ok untill i slow down to a stop then it idles very low so low it stalls it doesn't do it all the time but mostly when i put it in reverse... the only reason i think it does it in reverse more is because it has the most torque so you dont have to use as much of the gas pedal to get it going which results in the low idle stalling... i replaced the crankshaft position sensor and cleaned the maf sensor... any info would help please and thank you
Crow from United States a year ago  
CR
1 report 

Have to floor truck to get going.

Ford F-150 1994 Standard Cab F-150 200000 miles
I have a 1994 of 150 and I have replaced the spark plugs wires throttle positioning sensor clean the throttle body remove both cats and put a piece a straight pipe in their place and also replaced the Ignition coil and clean the mass air flow sensor and still the truck doesn't react to me pressing the throttle until I have it to the floor and just recently I started backfiring.
Chad from United States 3 years ago  
CH
5 reports 

Ooses acceleratio

Ford F-150 2000 4.2 f 150 170000 miles
Runs smooth in park. Looses power going down the road, starts popping, will not accelerate, stays on but will not accelerate. Changed coils, plugs, wires ,cam position,egr, vacuum linesMAF.
Javc from United States 4 years ago  
JA
1 report 

Tarda mucho en prender ,trae sensores ( de levas y cigüeñal nuevos ,bo

Ford F-150 2001 5.4 235000 miles
Tarda en prender ,tengo sensor de árbol de levas nuevo ,sensor cigüeñal nuevo ,cableado Delos mismos revisados ,bomba de gas nuevo ,filtro de gas y aire nuevos ,el MAF nuevo ,bobinas y bujías nuevas,motor de arranque nuevo ,batería buena,banda nueva,alternador nuevo ,presión y chispa buenas ,fusibles y relays marcan bien...tierras bien ,ya no se a pueda ser ayúdenme x favor...AVECES prende como sin nada y AVECES tarda mucho ,el Thef no es ,el cortador de la bomba tampoco ,q podrá ser x fa y mil Gracias.
Checo from United States 4 years ago  
CH
9 reports 

Stalling out and acting like its misfiring once at 1.5 rpm

Ford F-150 2010 5.4 v8 harley davidson edition 82000 miles
My truck has the wrench light on the dash. I had the transmission serviced recently and the coils replaced. Also did an oil change. I replaced my mass air flow sensor myself.
Christy from United States 5 years ago  
CH
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