EBPV leaking air?
Thread Starter
|
Freshman User
Joined: Mar 2006
Posts: 32
Likes: 0
EBPV leaking air?
Hey fellas, this is my first post. I couldn't find anything on this issue searching the forums so here we go. 15 psi. is the max reading I get on my edge evo display, empty or pulling a trailer 3000lbs - 10000lbs. And honestly my 03 f150 w/5.4l pulled stronger. I tried disconnecting red line going to the wastegate, still only 15 psi. WOT., programmer on race and extreme settings still only 15psi. with no real increase in power so I did the leak test with a homemade tester @25lbs of air, heard air leaking behind the turbo. With a mirror, flashlight and soapy water I found that it was leaking at the EBPV diaphragm where the rod enters. I've read that oil can leak from here, but air?? Any ideas or thoughts would be much appreciated.
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
It's because you've pressurized the crankcase too. You may have a small oil leak at the pedistal, and when you pressurized the crankcase, you heard air from there too. If the oil leak gets bad enough, you'll have to fix it. Otherwise don't worry about it.
If you are positive that there are no other boost leaks, then look behind the turbo at the up-pipes. Check for soot around the collector, since that is a very common spot for an exhaust leak. An exhaust leak at the up-pipes will also cause performance issues similar to a boost leak.
If you are positive that there are no other boost leaks, then look behind the turbo at the up-pipes. Check for soot around the collector, since that is a very common spot for an exhaust leak. An exhaust leak at the up-pipes will also cause performance issues similar to a boost leak.
Thread Starter
|
Freshman User
Joined: Mar 2006
Posts: 32
Likes: 0
Up pipes are not leaking I fixed them 2k ago and are still holding up. I checked the turbo wheel it's a little dusted but not rounded and zero play in and out, or up and down. Could it be a fueling problem? Thanks.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
You've got some kind of issue going on. What if you just pressurize it to 20 PSI and hold it there? Can you find any leaks that way? I assume you left most of the IC plumbing hooked up for your pressure test? Up pipes would have been my guess too. I trust you have verified they are not leaking, not just assuming their good since they're new.
Where does the edge get the boost reading from? Do you have an actual probe, or are you hooked into the wire on the MAP? Any type of boost fooler that may be affecting the reading?
I guess fuel restriction could be a possibility. You'd need to get a gauge on the fuel bowl port with a long hose to monitor while driving under load.
Where does the edge get the boost reading from? Do you have an actual probe, or are you hooked into the wire on the MAP? Any type of boost fooler that may be affecting the reading?
I guess fuel restriction could be a possibility. You'd need to get a gauge on the fuel bowl port with a long hose to monitor while driving under load.
