Hi all,

Can anyone confirm the ignition coil order in the Mazda CX9 2008 AWD Grand Touring v6? I think 4-6 are in the front and 1-3 are in the back (and under the manifold?). Ignition Coil E (#5 I believe) has gone bad and I'm looking to replace it.

 

I would first confirm that the coil has gone bad. Assuming you have a registered DTC for that cylinder I would first swap out a coil from a known good cylinder and clear the DTC(you should have gotten) and see if the DTC returns to the suspected coils new moved location. This does not tell you the state of performance of the coil which could be borderline failing so you may not necessarily get a new DTC. But you can hope! If no DTC then you will need to check the coils resistance with a digital volt ohm meter. In the shop I use an oscilloscope which will absolutely confirm any failing of failed ignition part.
I don't suggest or recommend the replacing of any part before it has been confirmed bad. Many times, doing that kind of hit and miss can cause added problems to the already unresolved existing one.

As for the Firing order it is 1-4-2-5-3-6.
The front three cylinder from driver's side to passenger are 6 5 4
The rear is 3-2-1

ASE

 

Thanks! We experienced some "rumbling" while driving and idling yesterday and then the check engine light came on while we were on the freeway heading home. I have an OBD II reader so plugged it in and ran the diagnostic on it and it came back with this:



I saw this online while searching, which I think corresponds to what you say:


I marked 5 with blue painters tape and swapped it with 6. Then started the car and drove it around for 5 minutes or so. The DTC didn't come back on. I may have to drive it around more before it pops up I'm thinking. Otherwise, if I wanted to check with a digital volt ohm meter, how would I go about this? I do have a digital multimeter (and I think it has the ability to measure ohms). EDIT: I think I see how here, - I'm assuming it'll be similar with the ignition coils off the Mazda. I'll go check the resistance soon to see. What number(s) do I *want* to look for as far as resistance is concerned? I think I saw that if it reads 0 or close to that it's no good. In the video his readings are around 26 - is that what I'm looking for or will it depend on the coil and car?

 

If you cleared the DTC and it has not returned, you either need to drive a little more or the coil was not bad, and it was simply an anomalies condition that cause the problem that has now resolved itself?

Checking the coil with a DVOG is complicated there are several steps to do. LOL I am not sure how to shorten a HOW-TO ?? LOL