So I've been dealing with rough idle and sluggish performance lately.
CEL was on and had it scanned twice. First P0303 then yesterday got 2, P0302 and P0303. The car is definitely lacking power and running on < 4 cylinders.

Since I'm close to 60k, I decided to just change all the spark plugs. Still no go. Still runs rough. Broke down and bought the ScanGaugeII so I can at least diagnose what's going on.

Cleared the codes and now only P0302 shows up. With new plugs, I took the coilpack on cyl #2 {hope my assumption is correct that it's the 2nd from the passenger side}, and switched it with cyl #4 {driver's side}. Cleared codes and took the car for a drive. Not even 1000ft, CEL flashed and went solid.

Checked codes again and now it's showing P0304.

With this, would you say a coilpack replacement is in order, considering the code followed the coilpack I switched? Planning to switch it out with cyl #1 tomorrow and find out if it still holds true.

Thanks

 

If the problem is following the coil I think it would be safe to assume that it is the coil.

 

this.

 

Thanks again Braminator.

Heheheh. Guess I was asking for it eh?