4.6 Sputtering Idling Rough

[caribbeankruzer]

It just started yesterday as I was pulling in the driveway. I took it around the block and the CEL came on. Its got 90k on it so I replaced the spark plugs last night. I tested the primary side of the coils for continuity and they tested ok. Its runs a little better after changing the plugs but there is still a problem.

Is there a way to test the secondary side of the coils?

What's the best way to determine which cylinder is causing my problem.

Any help will be much appreciated.

[Airjer_]

Spark tester

Scan for codes. There will probably be a P030X. The "x" can be cylinders 1-8.

#4,5 and 7 seem to be pretty common.

[caribbeankruzer]

Originally Posted by Airjer_

Spark tester

Scan for codes. There will probably be a P030X. The "x" can be cylinders 1-8.

#4,5 and 7 seem to be pretty common.

Your correct....

My fater in law in PA got a reader to me this morning....p0307 so I chaned that coil out and I'm running great.......

Thanks!!!