New guy here, I'm having trouble with multiple codes on my truck(2001 F150 Supercrew 4.6L engine) the codes I'm getting are in numerical order

P 0171 lean on bank one
P 0302 misfire cyl 2
P 0303 misfire cyl 3
P 2000 ?I forgot what this one was?

Has someone seen this combo before and help me narrow down what the problem might be? Thanks in advance for any responses.

Paul Hastings

 

Problem solved, number 2 coil was bad. I have no idea what was causing the other codes to come up. Replaced coil cleared codes and drove approx 20 miles, no codes reappearing.

 

When the codes come back in the next 50 miles you might want to check for a intake leak on the passenger side.

 

Torkum,
Is it generally just an intake gasket leak? No codes yet, but when under load at partial throttle(high vacuum conditions) there is some roughness. Thanks for your help.

Paul

 

cam syncroniser is out.