Looking for some help. We're dealing with a 91 CRX w/B16A run by a PR3. The problem is we are hitting rev limit at 7200RPM. (It is my understanding that the PR3 has an 8200rpm limit). Here's the twist. We take a PR3 from another car here at the shop that runs a rev limit of 8200RPM. (We check this to make sure, yup 8200RPM!). We put this PR3 into the CRX and it hits 7200RPM limit. So what we have is: No matter what ECU we run in this CRX it will always cut off at 7200RPM. First question: What sensors may affect the rev limit in this vintage of OBD. Second question: What the hell is going on? Any help is appreciated.