Hey i just swapped the jdm b18c 98 spec type r motor and tranny into my 01 usdm type r. I am using the usdm engine wiring harness that connects to a jdm b18c 98 spec type r ecu. It is connected via a OBD2B->OBD2A converter. My problem is that vtec doesn't seem to be kicking in at the usual ~5800 rpm. Actually it doesn't kick in at all. The motor itself seems to be running pretty smoothly and idles perfectly. The vtec just wont kick in.

There is an extra connection(colored green) on the usdm engine harness that connects to what i believe is the oil pressure sensor near the vtec solenoid. The JDM motor doesn't have this sensor so it remained unplug. Does the JDM motor need this sensor to engage vtec?

I want to know how I can get my vtec to work again. Thank you.

 

bump. need help

 

try a usdm vtec solenoid

 

If you're using the JDM ITR ecu the plug is not needed. If you are using the USDM ITR ecu you will need to either get a USDM vtec solenoid or by pass the vtec pressure switch by jumping the wire to the vtec solenoid wire. Do you have any "check engine" lights on?

 

would a 96-00 EX vtec solenoid work for the jdm engines. i just remember hearing that you need si or gsr... but not sure if ex models would work. so it anybody knows,,yeah.


Modified by CRX_RR at 10:04 AM 2/15/2008