Rough Idling Issue, Can't Find Soulution Anywhere

[slinky25]

My skyline has been idling rough for a little over a year, I have a 97 GTS25t R33. What is does is when I am idle or accelerating quickly it will bog down a little or misfire, it's very noticeable and sometimes it is more frequent than others. It is much more noticeable when I am running the A/C also. It helps when I put the car in neutral at a stop light but still does it a little bit, when I am at cruising speeds it seems to be just fine although I think it would be harder to notice at those speeds, but definitely the worst when I acceleration especially going up hills. I have replace the spark plugs first and that seemed to make it better for just a couple of days. I changed both oxygen sensors, and recently just thoroughly cleaned the MAF sensor. I am looking towards the injectors next but would like some input before I dig into such a large job. Like I said it has been about the same for a little over a year, not really getting worse, but bad enough on a daily basis and more so when I run the A/C. Any help would be greatly appreciated.

[The Dan]

Sounds like an ignition coil misfire.

[BigBoyDan]

I changed both oxygen sensors

Correct me if I'm wrong but you should only have one.

These --> http://www.kudosmotorsports.com/catalog/splitfire-coil-pack-set-splitfire-sfdis005-nissan-skyline-r33-gts25-gts25t-gts4-r34-gtr-p-932.html

[slinky25]

Thanks for the info and the link, there is 1 under the hood and 1 on the exhaust, but today I removed the ignition coils and the spark plugs, did a very thorough cleaning and took careful time to replace everything, so far it is running very solid pretty much just as well as when i bought it 2 years ago (it hasn't ran that good in over a year) so hopefully the problem will not persist. I'm not that savvy with how everything works but mechanically i don't have a problem with replacing parts and configuring everything, so the input is definitely appreciated. Thanks again.

[Got a Pulsar]

The sensor in the exhaust (cat) is a temperature sensor not an O2.

What did you replace it with?

I want to replace mine as I had to cut it to replace my cat. (couldn't get it out)