Just got my car back, but they couldn't get the vtec to engage. Its a B20 with a B16 head running a 16g turbo off a 1st gen evo and a s300. Its all tuned and great up to the vtec crossover but it wont engage. Have oil pressure and can switch the vtec selinoid manually. Not throwing any codes. Any ideas what I can try or check? Think my remote oil cooler could have anything to do with it?