I am having a baffling problem with my 06 F150 XLT with 105000 miles. I am getting a loss of power.... misfire #3 and a left bank 2 too lean code. This has been an ongoing issue and Ive tried everything. The cats have been tested and are fine. Ive had all the plugs changed, COPS changed, changed the fuel filter and fuel module as well....no change. Any suggestions??

 

Flush the fuel rail...this is assuming you used the right plugs and COP's

 

The plugs and cops were replaced by ford. I will def do that. This problem has been ongoing though for months. Do you think it could be a bad injector?

 

Can you post the codes it must have?

 

I know it a misfire on startup, misfire #3, and left bank too lean. I'll get the exact codes later today

 

the exact codes are as follows. P0174, P0303, and P0316

 

Anyone familiar with this?

 

P0303 -Faulty sparkplug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

P0174 -
O2 sensor detects the lean condition; could be a dirty MAF (mass air flow sensor)

P0316 -
- Crankshaft Position (CKP) sensor harness is open or shorted
- Crankshaft Position (CKP) sensor circuit poor electrical connection
- Faulty Crankshaft Position (CKP)
- Ignition System
- Fuel Injectors
- Running out of fuel
- Fuel Quality
- Faulty Engine Control Module (ECM)

So, you have a bunch of possibilities. At this point I'd suggest cleaning the MAF, as that is a cheap repair, and not tossing any more parts at it and get it into a repair center.

 

I did clean the maf a few months ago but I will do that again. I did order an injector so I'm replacing that as well. As far as taking it in.... It's been there twice and 1800 later still not fixed

 

$1800.00 and it ran like this when you drove it off? Or are these new problems that have come up?

If I paid that and it ran like you describe, it would have not left the repair shops lot...