Boost Leak??? - Ford Powerstroke Diesel Forum
 
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post #1 of 6 Old 03-01-2009, 07:25 PM Thread Starter
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Boost Leak???

When I'm maintaining a steady speed in 1st through 4th gear, sounds like a massive boost leak coming from the pass side of vehicle. When idling, coasting, or accelerating, it doesn't do it. It is not speed sensitive, it is rpm sensitive. Also, it seems to stop doing it after I've been driving for about 15-20 minutes. Thought it might be bearings in turbo going, but I figured it would do it all the time if that were the case. Anybody know what this could be, have any advice, or a magic wand I could borrow?
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post #2 of 6 Old 03-02-2009, 04:00 PM
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Is this truck new to you? I believe what you are hearing is the exhaust backpressure valve closing part-way. This is common in cold weather, and will start to surge or 'sneeze' as the truck gets older and the valve becomes worn and sticky. I'm assuming you have no power issues? I don't think it's anything to worry about.

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Late '99 F-350 7.3l 6sp 2wd aftermarket dually kit 255,000mi STOCK
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post #3 of 6 Old 03-02-2009, 04:12 PM
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Sounds like your EBP valve closing to help warm the truck up!

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1997 Ford F-350, Dually conversion, Cobra 29 LX CB, 12000 watt converter, All LED lights, TW tunes, 4" DP, Napa Intake and lots of running lights.

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post #4 of 6 Old 03-02-2009, 11:44 PM Thread Starter
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Yes, truck is new to me. Sounds logical I guess. The truck is straight piped. I appreciate your help, you've put me more at ease about this.
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post #5 of 6 Old 03-03-2009, 11:06 AM Thread Starter
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Is there a way to eliminate this and just let the truck warm up without it? This is incredibly loud and annoying.
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post #6 of 6 Old 03-03-2009, 03:36 PM
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Yes, you can unplug the connector going to the EBPV solenoid valve. It is located under the turbo on the driver's side in the turbo pedestal down in the engine valley. It is a pain to find and get at, but the plug has a wire retainer, and when it's pulled out of the way, the plug pulls towards front of engine. There are pics of it on here somewhere, just do a search or look in the mods section. With this unplugged the hi-idle mode will still function normally.

Russ
Late '99 F-350 7.3l 6sp 2wd aftermarket dually kit 255,000mi STOCK
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