Low boost, high EGT.
Thread Starter
|
Elder User
Joined: Mar 2003
Posts: 588
Likes: 0
From: AZ.
Low boost, high EGT.
1997 F-350, E4OD, 4:10s, 60,000+ miles, 6637 intake filter, 3" DP, gutted cat, Edge Evolution programmer set on tow mode. I can't get boost over 6-7 # and it's hard to keep the EGT under 1000* post turbo.They begin to climb over that on every little grade. The programmer shows a code of "PO236-Turbo boost sensor- A circuit- performance." I get no CEL and no truck codes. No exhaust smoke unless floored and that can only be done when empty because of rising EGTs.
It's a pain to drive because I can't get a run for hills or keep the pedal down to pick up speed. It seems like I can't use over a third pedal. I had to pull over on a long hill in second gear when temps hit 1200 and I got a 1/4 second squeal, I guess from the turbo, just as I got stopped. I pull a 26' toy hauler with a gross weight of about 8-9000# and get 10 mpg.
I don't know what the temps were before installing the Edge because I didn't have the gauges installed. I called Edge and the guy said my problem wasn't the fault of their programmer. Any ideas what's wrong? ......Thanks for any help..
It's a pain to drive because I can't get a run for hills or keep the pedal down to pick up speed. It seems like I can't use over a third pedal. I had to pull over on a long hill in second gear when temps hit 1200 and I got a 1/4 second squeal, I guess from the turbo, just as I got stopped. I pull a 26' toy hauler with a gross weight of about 8-9000# and get 10 mpg.
I don't know what the temps were before installing the Edge because I didn't have the gauges installed. I called Edge and the guy said my problem wasn't the fault of their programmer. Any ideas what's wrong? ......Thanks for any help..
Postmaster
Joined: Feb 2004
Posts: 3,266
Likes: 0
From: Levittown
Really would like to see a realtime scann under the conditions.
Addition to above.
A WAG is check mapp pressure line for leaks and preturbo exhaust leaks.
Bill
Addition to above.
A WAG is check mapp pressure line for leaks and preturbo exhaust leaks.
Bill
Last edited by MADVAN; Nov 14, 2007 at 05:04 PM.
Elder User
Joined: Feb 2005
Posts: 712
Likes: 0
From: Marietta, OH/Weirton, WV
Deffinitely check for any boost leaks and the line that goes to the map sensor for leaks. With EGTs that high post turbo is very bad. I think its like 200 degrees cooler than pre turbo.
-------------Jeremy
-------------Jeremy
Trending Topics
Thread Starter
|
Elder User
Joined: Mar 2003
Posts: 588
Likes: 0
From: AZ.
Originally Posted by powerstrokeddiesel
check the ebpv
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Elder User
Joined: Mar 2003
Posts: 588
Likes: 0
From: AZ.
Originally Posted by jboard
Deffinitely check for any boost leaks and the line that goes to the map sensor for leaks. With EGTs that high post turbo is very bad. I think its like 200 degrees cooler than pre turbo.
-------------Jeremy
-------------Jeremy
Thanks.
Postmaster
Joined: Feb 2004
Posts: 3,266
Likes: 0
From: Levittown
Originally Posted by Jerrybo66
I have 13# back pressure at an idle that seems not right
At sea level your in the low 14.+ psi pressure. Most forget that we live in pressure.
Depends on sensors. Some read 0 at 14 psi.
Bill
Posting Guru
Joined: Mar 2007
Posts: 1,842
Likes: 2
From: hillsborough nj
i'd say either a huge boost leak (check the uppipes for cracks or maybe some bolts missing) or ebpv stuck.... but i'd give it a 55% chance of huge boost leak, 40% chance of ebpv and 5% chance of something else
Elder User
Joined: Feb 2005
Posts: 712
Likes: 0
From: Marietta, OH/Weirton, WV
No probs...has me stumped tho why the low boost...the low boost is directly related to high EGT, because when your boost goes up normally the EGT should goes down. Something is restrictive. Its a long shot but does anyone possibly think that maybe the EBPV could have hung up and when the rod pulled back i it snapped inside and the valve is now wedged in there some way.
------------------Jeremy
------------------Jeremy
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Originally Posted by jboard
No probs...has me stumped tho why the low boost...the low boost is directly related to high EGT, because when your boost goes up normally the EGT should goes down. Something is restrictive. Its a long shot but does anyone possibly think that maybe the EBPV could have hung up and when the rod pulled back i it snapped inside and the valve is now wedged in there some way.
------------------Jeremy
------------------Jeremy
Posting Guru
Joined: Mar 2007
Posts: 1,842
Likes: 2
From: hillsborough nj
Originally Posted by jboard
No probs...has me stumped tho why the low boost...the low boost is directly related to high EGT, because when your boost goes up normally the EGT should goes down. Something is restrictive. Its a long shot but does anyone possibly think that maybe the EBPV could have hung up and when the rod pulled back i it snapped inside and the valve is now wedged in there some way.
------------------Jeremy
------------------Jeremy
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
Check for loose clamps, exhuast leaks pre turbo, air filter restriction, MAP sensor line/sensor, also try unpluggin the MAP electical connector, if it runs better you need a MAP sensor. If all that checks out check fuel filter and fuel pressure.