spark plug problem help

[eezy.grizzy]

I just change my spark plug now the car running rough Instead of the ngk laser platinum I put the ngk iridium ix.......my questions is has anyone had that problem going to the iridium route

[Rogue One]

Did you check the gap on the new plugs prior to instillation?

[svard75]

When you say rough do you mean it's like a couple of cylinders aren't firing? When you changed plugs did you remove all of them at once? I did this once and my issue was I crossed the two plug wires drivers side two closest to driver

[L36]

Are you sure you plugged in the coils to the right harness plug? Its easy to mix cylinder 4 and 6 plug causing weird idle.

[eezy.grizzy]

When I change it I did it one cylinder at a time .....know I didnt check the gap

[eezy.grizzy]

Rough like its studdering ......I have check the coil plugs re torque the plugs still doing it..... anyone has iridium ix on their m45

[Ilya]

I agree with all others. Seems like a lose plug. Coilpack isn't firing.

[svard75]

I did on my V6 but I ensured they were the correct model for the motor and I double checked the gap. I found most NGKs are pretty accurately gapped from factory, but you should still check.

[eezy.grizzy]

Im started to think the iridium ix is not good for the car I have check and double check even triple check......I think ill bring it in in the morning in have them put the laser platinum which is oem recommended

[Double E]

You'll be butt hurt by how much they want to charge you for that.

Has it not thrown out a code yet?

[Ilya]

My money is still on the pack(s).

Find the one that isn't firing by unplugging the packs one by one (plugging back in before going to the next one) WITH THE CAR RUNNING. If the idle stays the same, that pack isn't working. If it changes, that pack was working and isn't your problem. I'm guessing you'll find at least one that the idle doesn't change with...

[eezy.grizzy]

It was cylinder 7 the spring inside the pack was missing

[Ilya]

BOOMSHAKALAKA!

Did you find the spring? Sucks if you gotta buy a pack, but at least you found the issue.

Also, please update your profile to show what car you have so we know for future threads. Thanks, greatly appreciated.

[eezy.grizzy]

Pep boys sell the spring by itself

[svard75]

LOL damn springs. I'll bet its still stuck on an old plug or it fell out after removing it. Use Dielectric grease in there to keep the stuff together and the moisture out.