Should've said something I got a few of them just lying around I could've sold you for cheap. Glad you figured it out though.

 

That's where having a scan tool would have came in handy. Pull up the misfire screen and you could see the misses racking up on those 2 cylinders.

 

Glad that's all it was. Mine started out as a p0304 and then went to a p0300. It was a real pain in the neck. Good luck with the fix, and I'm glad it was nothing more serious.

 

After swapping out the coil pack it was still not sparking. As it thurned out the unit under the coil packs was bad. When I took it out I noticed it was wet with engine oil. I swaped out the module and it is working fine. Now I'm monitoring the oil. I'm thinking the head gasket may be going.

 

PO300
PO403
PO405
PO446 ✴︎ ⬅︎ ⬅︎ ⬅︎

All these Codes were triggered by a faulty FUEL TANK PRESSURE SENSOR!

Wait for the Low Fuel Warning before attempting to DIY.
Start engine.
Pull FUEL PUMP Relay ... Let Engine stall to relieve pressure in system.
Remove GROUND Wire from Battery.
With car Raised and SAFETY STANDS securely in place.

Support Tank with Jack.

(I made a "Jig" to attach to the Jack. Sawed the square bottom off from Milk Crate. Drilled holes through Hockey Puck. Mounted Puck to center of Milk Crate with Heavy Duty Zip Ties. Affixed carpet to other side of Milk Crate bottom for padding.)

Lower tank enough to access Sensor atop Fuel Pump.
Unfasten Pigtail from Sensor.
Unclip and Remove Sensor ••• Straight-up.
DO NOT BREAK THE END OF SENSOR OFF INSIDE PUMP!!!

If you need a Charcoal Canister do it when you replace Sensor.

Removing Relay to releive Pressure throws a Code which may require a MIL Light reset.