Engine issue that has the dealer stumped?

Nick408

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Hi guys,

hadn’t owned this truck for more than 24 hours before I noticed a weird issue coming from the front fender areas. Basically cruising on the freeway (now also apparently city driving) you’ll give it a little gas and hear what sounds like a ton of air coming from the fender areas, followed by a “clunk” then back to normal engine operation. This can last up to 10-15 seconds. My first thought was maybe stuck wastegate but I was still seeing boost. And for some reason this only happens when I’m in 2H, when I drive in 4A everything seems normal
 

Dustan

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Nick408

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Thank you! I’m going to call the service manager
 

Nick408

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So, I dropped was told they pressure tested my system, they found a bad hub. Replaced the hub and pressure tested it again, said everything is fine now come pick it up. I came to pick it up and driving on the freeway starts making the same exact sounds again. It seemed like every time I tried to accelerate and it went into boost the IWE system was losing vacuum? I just about done with this and am about to tell the dealer just give me my money back and take their truck back
 

FordTechOne

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So, I dropped was told they pressure tested my system, they found a bad hub. Replaced the hub and pressure tested it again, said everything is fine now come pick it up. I came to pick it up and driving on the freeway starts making the same exact sounds again. It seemed like every time I tried to accelerate and it went into boost the IWE system was losing vacuum? I just about done with this and am about to tell the dealer just give me my money back and take their truck back
The system is losing vacuum through a leak or a faulty check valve. It’s not difficult to diagnose, it’s a simple vacuum system. There is a comprehensive pinpoint test for your exact concern in the Workshop Manual; there is no reason they can’t properly diagnose and resolve the issue.
 

Donovan

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I get the same mess sometimes. I know its my IWEs. I am surprised there is no sensor for this.
 

Nick408

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The system is losing vacuum through a leak or a faulty check valve. It’s not difficult to diagnose, it’s a simple vacuum system. There is a comprehensive pinpoint test for your exact concern in the Workshop Manual; there is no reason they can’t properly diagnose and resolve the issue.
Apparently they hooked up their vacuum system test and it was reading correctly, so you’re right, obviously they’re missing something because I’m still losing vacuum
 

CoronaRaptor

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^^ shitty dealer, like @FordTechOne said, this is not rocket science for an experienced tech. Maybe find anther dealer or tell them to fix it again and talk to a customer service at Ford.
 
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