The SES code po420 keeps appearing and I am out of ideas. The car does not seem sluggish on take off but when it sits at idle it seems like it has a slight miss and the SES light has only come on at idle. Also, when I am driving at a constant speed I feel something like a miss, for example, if I am going 50-55 mhp in 4th gear once in awhile I will feel a chug. I just changed all the wires except one because my headers are in the way and it is hard to get to. So I will have to change that one when I have a little more time to play with it. My spark plugs should be fine since I just changed them in december. If changing that last wire does not fix the problem I have no idea what to try next. Maybe clogged injector or bad coil?
Any ideas? thanks
[ May 20, 2005, 03:58 PM: Message edited by: 2002 v6 camaro uncharged ]
Any ideas? thanks
[ May 20, 2005, 03:58 PM: Message edited by: 2002 v6 camaro uncharged ]
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