Cx5 p0304 tried everything

[danielkote]

Hi guys

I have 2016 cx5 with p0304. It goes to limp mode with ac on and under load.

Me and my mechanic replaced injector-resistance tested, coil, plug, checked wiring, did walnut blasting valves, checked compression, even swapped ECU..still same problem. Getting desperate. Does anyone have any ideas? Thank you

 

[N7turbo]

Does it go into limp mode under load with AC off?

 

[danielkote]

Does it go into limp mode under load with AC off?

So far it has not, I guess max AC fan adds too much load, but it does have slight jerk even idling. Can feel misfire

 

[N7turbo]

Is there anything else about the electronics that has been modified?

I wonder if it's your alternator? Have you measured the voltage of the battery while running?

 

[danielkote]

Is there anything else about the electronics that has been modified?

I wonder if it's your alternator? Have you measured the voltage of the battery while running?

Nothing was modified. I will ask my mechanic about voltage

 

[cz5gt]

Mazda oem plugs and oem coil or aftermarket?

 

[danielkote]

Mazda oem plugs and oem coil or aftermarket?

Aftermarket, getting 1 ngk laser plug for cylinder 4 today to see. Do you think one in misfire cylinder will show difference? If thats it of course will buy a set. Also thinking rocker arm

 

[N7turbo]

We've seen a lot of issues with aftermarket coil packs on the forum here.

 

[elementCX5]

We've seen a lot of issues with aftermarket coil packs on the forum here.

Not a mechanic, but I watch YouTube mechanics such as South Main Auto, Royalty Auto Service, and Rainman Ray.
The amount of times aftermarket parts or knockoff Ebay/Amazon parts cause issues is way too high.
If its something necessary for smooth operation and drivability, stick with OEM from a reputable vendor.

 

[danielkote]

Not a mechanic, but I watch YouTube mechanics such as South Main Auto, Royalty Auto Service, and Rainman Ray.
The amount of times aftermarket parts or knockoff Ebay/Amazon parts cause issues is way too high.
If its something necessary for smooth operation and drivability, stick with OEM from a reputable vendor.

Just swapped oem plugs, same thing