[Toddwardrip]

There could be some stored / pending codes so you might wanna scan it anyway.

What all has been done tune up wise?
You know....plugs, wires, cap, rotor, air filter, pcv valve etc.

How old(mileage) is the fuel pump?

Not really sure about the fuel pump mileage, plugs cap, rotor, and plug wires where done last year, wouldn't the fuel pump code though?

 

[Toddwardrip]

Really hoping its not the fuel pump, looks like the best way to get at it is by removing the bed, thats not going to be fun

 

[Toddwardrip]

Looks tough, thanks for the pics

 

[Toddwardrip]

Any idea where the pcv is located?

 

[Toddwardrip]

Do you have to take off the back bumper?

 

[Toddwardrip]

Checked my fuel pressure, i am running between 35 and 40 psi, seems to be right where it should be, i replaced the fuel pressure regulator, pcv(wonderful idea locating it behind the alternator), i broke down the throttle body and replaced the three gaskets(cleaned everything), replaced both idle air control valves, the throttle position sensor, and the MAS airflow sensor, replaced every hose, and the thermostat (another good location(behind the power steering pump)), and every time i shift into gear my idle goes up, i have a code P0171(cant remember which bank), this truck is driving me nuts.....

 

[Toddwardrip]

Think i might have killed my O2 sensor with throttle body cleaner

 

[Toddwardrip]

I already bought the new one

 

[Toddwardrip]

The codes have changed, now have 1 for MAP sensor(i changed this sensor), and 1 for throttle position sensor(new sensor also), will a hard reset fix this?