Fixing up this 88 toyota supra that was my moms at one time. when i got it it had a bhg which i replaced and had the head shaved. Anyways, my problem now is I have no vacuum to the throttle body or egr valve. but i have great vacuum off the intake chamber and brake booster. I've done a bench test on the vsv's and the vcv that sits on the vacuum surge tank. the vsv's checked out but the vcv did not as well as the vacuum surge tank check valve on the inside sticks. Ive tried finding replacement parts but had no luck (discontinued). What im experiancing is unspent fuel dumping in the exhaust and burning in the cat convertor and for some reason it ran hot once. Any help on what to do from this point would greatly be appriciated.