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Ford Raptor Forums - General Information
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Weak Vacuum Line and grinding noise FIX
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<blockquote data-quote="CSF150" data-source="post: 943511" data-attributes="member: 19553"><p><strong>Vacuum Booster Problem.</strong></p><p></p><p>Hi</p><p>Just came across this forum and it sounds like my problem for my F150. I checked for vacuum (no gauge.. just by finger) and find that there is vacuum coming from vacuum booster to hubs for 2H and 4H. It makes noise in 2H (clicking/buzzing) but not in 4H. Perhaps the amount of vacuum changes with the dash switch? If I understand things, the vacuum booster needs to be replaced and I may need to replace the tubing (will need to buy a v-gauge) though when not running the vacuum in line (the lower fitting of the v-booster that Tees with a blue check valve, held vacuum for a number of minutes anyway)?</p><p></p><p>I guess I should have added it is a 2010. I noticed it the first cold morning (about -16F) and momentarily switching to 4H silenced it. The next day that trick stopped working and it became none stop.. I put about 10 miles on it.. Is it likely the actuators are now damaged and need to be replaced? </p><p></p><p>Thanks in advance for any comments or suggestions!</p></blockquote><p></p>
[QUOTE="CSF150, post: 943511, member: 19553"] [b]Vacuum Booster Problem.[/b] Hi Just came across this forum and it sounds like my problem for my F150. I checked for vacuum (no gauge.. just by finger) and find that there is vacuum coming from vacuum booster to hubs for 2H and 4H. It makes noise in 2H (clicking/buzzing) but not in 4H. Perhaps the amount of vacuum changes with the dash switch? If I understand things, the vacuum booster needs to be replaced and I may need to replace the tubing (will need to buy a v-gauge) though when not running the vacuum in line (the lower fitting of the v-booster that Tees with a blue check valve, held vacuum for a number of minutes anyway)? I guess I should have added it is a 2010. I noticed it the first cold morning (about -16F) and momentarily switching to 4H silenced it. The next day that trick stopped working and it became none stop.. I put about 10 miles on it.. Is it likely the actuators are now damaged and need to be replaced? Thanks in advance for any comments or suggestions! [/QUOTE]
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Ford Raptor Forums - General Information
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Weak Vacuum Line and grinding noise FIX
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