Loss of power, MPG down, Poor throttle response.

[CamoX413]

Hey guys just when I thought I got her running right my 01 Ram 5.2 popped codes for a large and small evap leak.

My MPG are down, I've lost a lot of power, on the interstate I can smash on the throttle and it doesn't want to downshift and take off like normal. Also I'm getting a lot of noise from my PCV valve that I haven't heard before. I pull it from the valve cover and there's an unbelievable amount of suction on the PCV valve that I haven't noticed before.

Wondering if the plenum gasket has failed maybe? I'm going to look for oil pooling this evening.

 

[Fast69Mopar]

Hey guys just when I thought I got her running right my 01 Ram 5.2 popped codes for a large and small evap leak.

My MPG are down, I've lost a lot of power, on the interstate I can smash on the throttle and it doesn't want to downshift and take off like normal. Also I'm getting a lot of noise from my PCV valve that I haven't heard before. I pull it from the valve cover and there's an unbelievable amount of suction on the PCV valve that I haven't noticed before.

Wondering if the plenum gasket has failed maybe? I'm going to look for oil pooling this evening.

To verify that the plenum gasket is leaking or not, disconnect the breather hose from the air intake and place your thumb over the hose. If you feel a strong vacuum pretty quick then the plenum gasket is leaking. Make sure all of the engine vacuum lines and connections are intact. Inspect the EVAP canister and the leak detection pump hoses for cracks and leaks.

 

[CamoX413]

To verify that the plenum gasket is leaking or not, disconnect the breather hose from the air intake and place your thumb over the hose. If you feel a strong vacuum pretty quick then the plenum gasket is leaking. Make sure all of the engine vacuum lines and connections are intact. Inspect the EVAP canister and the leak detection pump hoses for cracks and leaks.

Removed the breather hose. There's a small amount of suction but not much.

Sprayed around the engine bay with carb cleaner but no change in engine idle.

Going to open the throttle plates and take a look now.

Will check evap hoses near the evap canister soon.

I literally have no power at all until the gas pedal hits the floor and even then it's not as much as usual

 

[CamoX413]

My PCV valve starting making a lot of noise also. I can hear it with the engine running a loud buzzing sound.

Changed it just now but that didn't change anything. It's still noisy and I can feel the massive amount of air being sucked through it when I grab the hose

 

[CamoX413]

Pulled the throttle body definitely have some black oil pooling in the back. Maybe a soda cap full or 2

 

[CamoX413]

Anyone with any knowledge on this?

 

[Chuck962500]

Plenum gasket leak starting to clog your cats..