Low boost, high EGT.
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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..
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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.
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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
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From: AZ.
Originally Posted by powerstrokeddiesel
check the ebpv
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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.
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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
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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
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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
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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
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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
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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.