P0171

[Ehab]

Hi guys, I would appreciate if you could help me with this I got 4runner 2001SR5 152k last OBD2 code P0171 sys too lean maintenance done:
1- New MAF sensor
2- New o2 sensor
3- New Air filter
4- New fuel filter
5- Cleaned fuel injectors
6- Cleaned fuel tank
7- Cleaned throttel body
8- No vacuum leak
9- No exhust leak
10- Removed catalytic converter
11- New spark plugs
12- New spark wires
13- PVC
14- Grounding wire is fine
15- Timing belt
after all of that nothing sames to work I still got P0171 check engine along with VSC lights too. The car sames to work fine with no symptoms exempt for very bad fuel consumption full tank around 260mil I am disbred her.
what sames to be the problem, did I miss something?

 

[MattRagle]

What brand MAF did you put on, maybe it was faulty?

 

[Doc2012]

I've got the same problem man.

Leaning toward a fuel pump at this point.

 

[Ehab]

Original Denso part from Toyota agent.I also compared it with the old one exactly the same.

 

[4Runnin2000]

I started a thread on this a while ago. Was about to update it actually. I'm going to tune in to this thread and steal some ideas. Replaced my front o2 and code is back on. Bad gas mileage for me also. But about 200 a tank if I'm lucky. I would love to have 260!

 

[zoombyu86]

I had this when I initially bought mine. Cleaned the MAF and replaced the 02 sensor. Was gone and came up again 1.5 months later. Cleaned the MAF, then swapped it, still no luck. Eventually the fuel pump took a shit almost with no warning. No more code after changing the pump. I suggest testing fuel pressure. Mine tested good for voltage and resistance at the pump but wouldn't start, didn't have the means the testing pressure.

 

[Ehab]

Guys just to add a small comment I noticed a gas smell in the hood.