Rasetsu99

Car info: MY03 with 105k miles, K&N CAI, new MAP, plugs with about 5k on them.

So about a month ago my car came up with the P0303 code. Since I knew the plugs were new, and I checked the torque, I decided to replaced the ignition coils. Since the OEM ones were double the cost of the RSX (30520-PNA-007) I bought 4 of these and replaced them. I have had them on for about 2 weeks now and didn't have any issues until today.

First it was a hard start, and then as I was driving, the car started idling extremely rough and was sputtering between 1k and 3k RPM. I was able to make it home which was about a mile, and I could hear the car "pop" when I was in the 1k to 3k range.

When I got home, I pulled the codes and got P0300, P0301, P0302, P0303, and P0304. So the first thing I check were the plugs and they seemed fine. Then I decided to switch the coils back to the old OEM ones.

Once I switched the coils back, the car ran smooth again. I did notice that the RSX coils don't "clip" into the harness, rather they are snugly attached. Could it be the connections came loose? I don't remember any of them being loose when I took them out though?

Has anyone else had issues with the RSX coils?

2003AP1

Are you sure RSX coils are the same specs? Resistance and wiring and what not? Sounds like you only needed one coil to begin with.

Rasetsu99

Yeah, based on other threads on the forums the RSX coils are an upgrade for the AP1.

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