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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
IWE vacuum system upgrades
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<blockquote data-quote="Squatting Dog" data-source="post: 210334" data-attributes="member: 1688"><p>The vacuum line diagram is incorrect (at least it is different from my truck) Same basic principal... The vent lines come directly from IWE up the spindle to the frame rail right above upper control arms on both sides. these are the open vent lines I am talking about. The vacuum from IWE module holds the diapham against return spring until the driver switches to 4wd. At which point the IWE solenoid changes state and the vacuum is removed. The spring in the IWE presses the diaphram the opposite direction while engaging the cv shafts to the hubs. This movement pulls unfiltered air and everything else into the IWE.. Which in time degrades the IWE diaphram and causes grinding and eventually loss of 4wd.. Once the diaphram is compromised, the crap travels up the vacuum line and trashes the IWE solenoid..</p><p></p><p>-Greg</p></blockquote><p></p>
[QUOTE="Squatting Dog, post: 210334, member: 1688"] The vacuum line diagram is incorrect (at least it is different from my truck) Same basic principal... The vent lines come directly from IWE up the spindle to the frame rail right above upper control arms on both sides. these are the open vent lines I am talking about. The vacuum from IWE module holds the diapham against return spring until the driver switches to 4wd. At which point the IWE solenoid changes state and the vacuum is removed. The spring in the IWE presses the diaphram the opposite direction while engaging the cv shafts to the hubs. This movement pulls unfiltered air and everything else into the IWE.. Which in time degrades the IWE diaphram and causes grinding and eventually loss of 4wd.. Once the diaphram is compromised, the crap travels up the vacuum line and trashes the IWE solenoid.. -Greg [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
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IWE vacuum system upgrades
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