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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

function of 'gas filter'??

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Old 01-29-2018 | 02:22 PM
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rancherman's Avatar
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From: NC nebraska
function of 'gas filter'??

put on new vacuum lines on my 94 22re, and was curious of the function of the 'gas filter' on the plenum? I traced this line back through the vsv, and it ends up at the fuel pressure valve. Is it to prevent raw gas out of the vacuum system in case the fpv goes south? Or is it's function less glamorous?
Old 01-29-2018 | 03:18 PM
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It's just to keep debris from getting sucked into the plenum. It has three ports to "supply" vacuum to various components (PAIR, ADD, EGR, and Fuel Pressure Up), and any one of them could have a line pull off and suck whatever is floating around the engine compartment into the engine.
Old 01-30-2018 | 04:50 AM
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Sounds reasonable. Thanks.
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