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Frank Type R

Dirty vacuum hose

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Hi there just wondering about having oil running down hose from intake manifold on my Type R B18cR running a Storm G4 ecu. What is the purpose of this port and does it matter if there is oil going down the hose?

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The G4 Storm had an on-board MAP sensor so I presume this is a vacuum hose going to it.  Getting dirty oil in there definitely isn't good and could cause the sensor to eventually mis-read or fail.  If you can't rectify the source of the oil (could be aggressive cams, worn valve seals, pcv, etc.), you should at least run a small in-line vacuum filter to prevent any more oil from going into the sensor.

Something similar to this:
https://www.amazon.com/HKS-4599-RA017-Mini-Vacuum-Filter/dp/B000ECLHNI/ref=sr_1_18?s=automotive&ie=UTF8&qid=1530895981&sr=1-18&keywords=mini+vacuum+hose+filter

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