P0303 code on my Econoline 4.2 L V6. There is noticeable sputtering as I accelerate at low speed once the engine
has warmed up, not really noticeable at higher speeds. The plug fires. I replaced it and put the old one in the plug wire and laid it on the engine, started it and saw that it was sparking. The injector makes its clicking noise so I know it's trying to work. The plug that I replaced seemed not to have discolored much when compared to another plug, making me suspect that there wasn't much exploding in that cylinder. I'm wondering what to try next.
JA: Where exactly do you think the noise is coming from? And how long has this been going on?
Customer: I used a long screwdriver as a stethoscope to hear if the injector was working.
JA: What is the model/year of your Ford?
Customer: It's a 1999 e150.
JA: Are you fixing your E150 yourself? What have you tried so far?
Customer: I did the troubleshooting I described in the first paragraph.
JA: Anything else you want the mechanic to know before I connect you?
Customer: I don't think so.