Spark Plug Diagnosis

[85_Ranger4x4]

All three of them look different.

I wouldn't be surprised if #3 didn't match too, the back ones are kind of a pain to get to. #3 is easiest accessed thru the wheel well (at least it was on my 2.8)

 

[jprevat]

All three of them look different.

I wouldn't be surprised if #3 didn't match too, the back ones are kind of a pain to get to. #3 is easiest accessed thru the wheel well (at least it was on my 2.8)

The first two at least have the same part number. I was looking at cyl 3 trying to decide what combination of extensions would get me where I needed to be. Thank you for the tip.

 

[jprevat]

Finally found time to pull cyl 3 and it definitely has a cracked insulator on the plug as well as being pretty filthy. I'm sure that's lending itself to the rough running.