Ok this is for you honda pros.....I have a 94 JDM H22A in my 97 civic. I had a P28 running it and I was running way rich. I switched to a P72 to see if it made a difference ie..Knock sensor, IAB sensor. It didn't, still running rich. So now I have a P13 USDM and I'm still running rich, but now I'm hitting my rev limit at 6200 or so, and throwing a check engine light after about 10 min of driving. Switched back to the P28....no limiter. So I jumpered the test connector and I got a solid MIL and a SRS light. Any ideas??????