Hello guys, I turned on my truck yesterday and the truck said "Engine Reduced Power". The gas pedal would not work and the truck was running on low power. I checked a few things and noticed the throttle body was extremely dirty. I replaced the whole unit and the truck turned on but now it idles at 3000 RPM. I reset the computer a few times and same problem. I cleaned the old throttle body and put it back and still same issue. Theres no signs of leaks or faulty wires. When I turn my truck for the first time it will idle around 1000 but I think that's because the engine is cold; ill turn it off and on again and its back to 3000 rpm. Any ideas of what I can check?

 

Might be a vacuum leak, you'd have to determine that with starter fliud sprayed lightly around joints, connections.

 

Check for codes, even if the light isn’t on - if you reset the PCM then any codes present should point you in the right direction. Code readers are cheap but many parts stores will check them for free.

Also, the wiring may be in tact, but these engines are sensitive to terminal connections - even slightly loose connections can mess with the signals. Disconnect the TB and remove the retaining clip from the inside of the harness connector (a small flat blade screwdriver works) - inspect the terminals for wear - the tangs should be closed together inside the terminal. If not, the terminals can be removed from the connector and tightened.

There’s also a ground on the RR of the engine that’s known for corrosion and problems loosening up. The TB is one component that grounds there.

 

+1
may also need an idle relearn and tps relearn.