The auto zone computer for my truck says system to lean bank 1. Has a rough idle the engine knocks when it sits still. I have loss of power in 1000 rpms and 4000 to 5000 rpms. Replaced both the o2 sensors, spark plug coil pack, fuel filter, cleaned and regap spark plugs, cleaned the throttle body and all of the wire connections in the motor of the truck, and cleaned the MAF and TPS. Please help and tell me what you think the problem can be.

 

Vacuum Leak!

Wayne

 

2.3L has power???? never knew that. most likely a vacuum leak

 

How would i check for a vacuum leak.

 

Take carb cleaner and spray it around the engine bay, if the idle changes look closely in that area and spray each hose one by one until you find the leak.

Wayne

 

or propane. they both work

 

Its not an air leak, but the idle starts to skipping when I turn the AC on and when I punch the pedal it trys to go but it wont hardly go like it use to.

 

Sure you didnt cross one or more the the plug wires?

Wayne

 

yeah i checked the manual and bought new double platinum spark plugs.

 

Could it be the pcm because I took it to a local shop and they said it probably was the pcm,

 

Replaced the pcm today and ford said it was the spark plugs I have and that they need to be running motor craft not autolite. Is that true?

 

I fixed the rough idle by cleaning out the IAC but it still want hardly go when I punch the pedal.

 

Put motorcraft plugs in it, i would have done that before replacing the PCM.Plugs are cheaper.....

 

Ford told me that after programing my pcm. I took it to a mechanic and they said it was the pcm so I replaced it.

 

problem fixed. It was the coil pack.