Your previous engine was a VTEC engine as well, just that it is a SOHC with different operating conditions. For the H22A1, VTEC turns on at 5200 rpm and engine noise would sound different with extra pull.
If the scan tool cannot communicate, it can mean something is not wired correctly. If you have battery voltage at terminal # 16 and scan tool does not read, try the manual code retrieval to see if you can get the MIL to flash codes. Bridge terminal # 4 and # 9 and turn ignition switch on to see if it works.
If engine performance is below par, check the exhaust system for clogging.
Tuesday, October 16th, 2012 AT 8:52 AM