OK. New Development
Logistics Pro
Joined: Mar 2007
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From: Claremore, OK
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Elder User
Joined: May 2008
Posts: 550
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From: Sioux City, IA
Ran AE while driving to the airport today. Exhaust back pressure absolute was always 14-18 higher than exhaust back pressure desired. Exhaust back pressure absolute was running the same as SG II (ran SG II before running AE, I know not safe to switch while driving, but OH WELL). Also, exhaust back pressure on AE ran at ~2.5 V while at cruising speed.
FYI - These tests were ran while at 2000 RPMs going down the interstate.
FYI - These tests were ran while at 2000 RPMs going down the interstate.
Hotshot
Joined: Apr 2010
Posts: 19,071
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From: Saratoga Springs,UT
Ran AE while driving to the airport today. Exhaust back pressure absolute was always 14-18 higher than exhaust back pressure desired. Exhaust back pressure absolute was running the same as SG II (ran SG II before running AE, I know not safe to switch while driving, but OH WELL). Also, exhaust back pressure on AE ran at ~2.5 V while at cruising speed.
FYI - These tests were ran while at 2000 RPMs going down the interstate.
FYI - These tests were ran while at 2000 RPMs going down the interstate.
Thats A BIG Diffrence if Im understanding it right thats Huge Diff
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Elder User
Joined: May 2008
Posts: 550
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From: Sioux City, IA
Replaced the oil pressure switch tonight. I noticed while taking apart the intake that EVERY clamp was loose. So loose that I could spin the screws with my fingers. Even the one at the turbo was loose. I really don't know how it hadn't came apart.
Anyhow, changed the oil pressure switch and reinstalled the intake making sure to tighten all the clamps. Truck seemed to run a lot better. Turbo seemed to whistle like it used to and seemed to accelerate and run much smoother. Would the loose clamps cause the shuddering issues I was having?
Anyhow, changed the oil pressure switch and reinstalled the intake making sure to tighten all the clamps. Truck seemed to run a lot better. Turbo seemed to whistle like it used to and seemed to accelerate and run much smoother. Would the loose clamps cause the shuddering issues I was having?
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Elder User
Joined: May 2008
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From: Sioux City, IA
Yeah, seemed BIG to me too. The EBP was in absolute though. Does that mean I should subtract atmospheric pressure from it's reading?
Hotshot
Joined: Dec 2003
Posts: 15,369
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From: Stuttgart, Ar
I guess EBP desired is something new for me. I don't remember seeing that on my previous version of AE but then I wouldn't have looked for it either. EBP, MAP, and BARO should be checked at KOEO and be within .5 psi of each other. EBP running is going to vary with boost. I guess EBP desired is something the PCM is trying to control to maintain a particular boost level.
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