Thanks 88racing. That's good information. I'm not in a pinch so I can probably order from ebay. If I was in a big yank I'd have to go to my local dealership. I appreciate the suggestion.

 

Just a thought...is there a way to test a coil to evaluate it's function? Something like a resistance test with a multimeter? I know it's #4 (according to my Edge) but if I can test them all I'd like to see if there are any others that are becoming questionable.

 

So the way I understand this is cylinder 1 is on the passenger side closest to the radiator. Or front of the engine? Need to replace that one but wasnt sure if it was on driverside or pass side front or rear. Thanks.

 

Standing in front of your vehicle looking into the engine bay the cylinder order is like so

4 8
3 7
2 6
1 5


So yes, passenger side closest to the radiator, which would be the front of the engine is number 1

 

The manual has a procedure to test primary and secondary resistance. However, that is only a bench test. That does not mean that the coil is not failing under load, causing low grade misfires. So on that level, when theyre bad, theyre bad... otherwise it is almost pointless to test them for issues like yours. If you want to pull them and test them, nothing wrong with that. Something questionable may show up. But when your chasing a low grade misfire that is only present under load or certain conditions, a bench test may not show anything.

 

That's correct, -Pointless. Since the misfire monitor will definitely pick up Primary or Secondary failure.

They have to be stress tested with the WDS Rotunda kit or Mode 6'ed for cylinder history. Most of us aren't equipped for that.

The unconventional way is to find the misfire load during a drive cycle. Hold/push, whatever you need to do to increase/force the miss count to satisfy the monitors count enough to produce the MIL/CEL. Which of course directs you to problem cylinder.

However, you could fabricate an LED board tied directly to each coil and wire it thru the firewall and into the cab. LED's connected to monitor coil pulse so that you'll know which one is acting up when it begins to mid fire. Wouldn't be THAT difficult. - A little time consuming maybe and......ate -up lol.

 

I don't know ? Why would that be oily , there ? I can't think of anything... I guess it could be sucking oil thru the PCV line ? Other than that, I'm drawing a blank, haven't seen that.

 

Isn't that the IAC muffler?

 

Yes.