Run an .125" nylon vacum line, not a rubber line. The nylon line can be pulled thru right next to the cable without any concerns of being crushed or squeezed. FYI there is also a similar access port on the passengers side where the AC condensor overflow tube runs thru the firewall. It is identified as a formed rubber hose about .750" diameter. Go under the car on a not humid day with the AC on and you can easily spot it. It is easy access from the interior, once the carpet is pulled up. It is under the ECU. Gordo
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