Check Engine Light issues and rough idle

[bahlingb]

For my 2002 Ford Explorer 4x4 XLT 4.6 I have codes P0401 P0152 and P1151 for my check engine light codes. These are I guess for exhaust gas recirculation flow and or O2 sensors. Engine is rough idling when in park or stopped and engine power seems to be a tad bit less than what it used to be. I have heard this could be one of three things a vacuum leak, a bad O2 sensor, or a bad EGR valve.. Also the car gets a bit jerky almost like it is choking up at cruising speeds (40-50mph) when the RPM's are low and I step on the pedal a bit and it seems go get worse as the engine heats up to normal operating temperatures. Any help or steering in the right direction would be greatly appreciated. Note: Have a new intake and manifold as coolant was leaking but has since stopped with new intake.. Thanks.

 

[caspian65]

What is the engine coolant temperature gauge showing? If it's less than halfway when at operating temps, you probably have a bad t-stat. Had the same symptoms on an '02 EB 4x4, popped in a t-stat for about $10 and problem fixed.

 

[bahlingb]

Temp is right in the middle, T-stat was replaced a little less than a year ago.