Engine puttering.... help plz

[Spladow]

2002 3.0
throwing code P1399
Engine just putt putt putt putt
Drives okay. It putters around. Both exhausts putt putt putt at the same time.
Lol sorry everyone. I don’t know how else to explain it.
Changed the plugs and coil packs and the o2 sensor in the cat from another code. But the car runs the same.
Help plz

 

[WHEEELMAN]

Hey guys
He's got a thread over on V6P and were trying to get him diagnosed too. Since he replaced his plugs and coil packs. We have eliminated that possible cause.

Since he also threw a code for the Secondary o2 sensor, I told him his next step should be to check out his converter. It might be clogged up causing excessive heat in the cylinders??

 

[Eclipse99fwb]

Have you checked the EGR valve and the port on the intake manifold? At work we had a 01 accord j30 throwing random misfires and it was due to a bad egr valve and the port on the intake manifold was clogged with carbon.