Boost question on 02
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Junior User
Joined: Jun 2008
Posts: 67
Likes: 0
From: Marble Falls, TX
Boost question on 02
Ok guys I just bought an 02 crew cab 4x4 with auto tranny a few months ago. So far I have put the 6637 filter in it and put gauges in it, so here is my question...When the truck shifts into overdrive it sounds like it has a boost leak, but the boost numbers are running at 6-10 psi. It doesnt do it until it shifts to overdrive and is more noticable when I am pulling a trailer. Is this normal??
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
What does a boost leak sound like? If it's just the sucking, vacuum cleaner type sound, then it's just the 6637 talking to you.
If you're a death row diesel guy, have one of them ride with you and take a listen. Cody and those guys have plenty of experience. Travis even has a super duty now.
If you're a death row diesel guy, have one of them ride with you and take a listen. Cody and those guys have plenty of experience. Travis even has a super duty now.
Logistics Pro
Joined: Dec 2010
Posts: 4,738
Likes: 15
From: Temperance, MI
If you're talking 6-10 psi at wot... You have a problem. Though boost leaks are usually not auditable because everything else is so loud going on under the hood.
Stock tuned you should be around 15-17 depending on who you ask... Some will say 17-19, I only seen 15 with the factory turbo.
Stock tuned you should be around 15-17 depending on who you ask... Some will say 17-19, I only seen 15 with the factory turbo.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
Many things can cause this, including a bad connection to a boost gauge. Is yours mechanical, electronic, or are you seeing it through an OBDII gauge?
Do you know what your exhaust backpressure is?
If you are confident in your boost readings, you can always do a search on the forum for "Boost Leak Detector".
Do you know what your exhaust backpressure is?
If you are confident in your boost readings, you can always do a search on the forum for "Boost Leak Detector".
Thread Starter
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Junior User
Joined: Jun 2008
Posts: 67
Likes: 0
From: Marble Falls, TX
It almost sounds like the waste gate is dumping the boost off as I am running down the road in OD, can get 20psi at WOT but when pulling the trailer and it shifts into OD cant get much over 10-12 psi.......Thinking I might have a waste gate problem. Havent had a chance to have Cody ride with me yet.
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Junior User
Joined: Jun 2008
Posts: 67
Likes: 0
From: Marble Falls, TX
Already did that.....Tugly just installed EV2 gauges, and had this problem before I installed the gauges, so not related to that.
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Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
You can check the EBPV control arm to see if it move freely without the linkage attached, then see if the control is keeping it in the open position.
The hissing could be a loose boot clamp or damaged boot. That Boost Leak Detector would be really helpful right now.
The hissing could be a loose boot clamp or damaged boot. That Boost Leak Detector would be really helpful right now.
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