Gen II 3.5 Egoboost vac pump
03-07-2019, 05:18 PM
#181
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This thread is a life saver. Same thing happened to me for the first time this morning. 2018 3.5 EB 26K miles. I've only had the truck for a month. Scary feeling after paying big money for a truck. Hoping like hell this fixes it. Thanks for the help @johnday !!!
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WhiteOx18 (03-08-2019)
03-30-2020, 07:09 PM
#182
I have this same noise on my 2018 3.5 EB. Haven't replaced the check valve yet but I thought I'd share how I diagnosed the problem. My service guy at the local dealership said to shift into 4wd on the fly while it's making the noise. It immediately silenced the grinding for me so I'm almost positive it's the check valve or something else in the vacuum system. Hope this helps and I'll update again once I get it fixed. Thanks for this thread! Super helpful. ZMC
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johnday in BFE (03-30-2020)
03-30-2020, 07:29 PM
#183
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I have this same noise on my 2018 3.5 EB. Haven't replaced the check valve yet but I thought I'd share how I diagnosed the problem. My service guy at the local dealership said to shift into 4wd on the fly while it's making the noise. It immediately silenced the grinding for me so I'm almost positive it's the check valve or something else in the vacuum system. Hope this helps and I'll update again once I get it fixed. Thanks for this thread! Super helpful. ZMC
