engine bog with easy throttle
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engine bog with easy throttle
'97 7.3 173k mi
in neutral the engine will bog (looses rpm) as the throttle is gently applied, or while cruising and gently adding a wee bit of peddle,
you can "punch it" no bog, or just push the go peddle some more and go right thru the bog
in "bog" mod the fuel mileage is atrocious...
never any tail pipe smoke...
this only happens when the ambient temp is below 40f
climbed in there with it runnin and found the bog to happen as the waste gate is "swingin"
no codes...
is this enough info tto start with?
thanx MSJ
in neutral the engine will bog (looses rpm) as the throttle is gently applied, or while cruising and gently adding a wee bit of peddle,
you can "punch it" no bog, or just push the go peddle some more and go right thru the bog
in "bog" mod the fuel mileage is atrocious...
never any tail pipe smoke...
this only happens when the ambient temp is below 40f
climbed in there with it runnin and found the bog to happen as the waste gate is "swingin"
no codes...
is this enough info tto start with?
thanx MSJ
Playing in the Dirt
Joined: Oct 2005
Posts: 2,302
Likes: 1
From: Southwest Georgia
Our trucks do not have a waste gated turbo. What it sounds like is that your EBPV (Exhaust Back Pressure Valve) is closing and staying closed. The purpose of the EBPV is to restrict the exhaust flow causing the engine to warm up faster. Most people just unplug it. It's a two wire connector under the intake side of the turbo, with a metal strap holding it in place.
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thanx plowhand
tween your statement and the fact that the wind chill is bout -10f, put a slab of cardboard over 1/2 of the radiator to test a theory, bad t-stat, or just dam_cold.
t-stat is flaky, jerking open. slamming shut. per infra red thermometer and ebpv action. will change it this weekend for an oem t-stat. the card board made a big difference in driveability.
and thanx for the correction on what i called a wastegate. lookin at your tuner list, impressive but greek to me can you refer me to a reading list?
MSJ
tween your statement and the fact that the wind chill is bout -10f, put a slab of cardboard over 1/2 of the radiator to test a theory, bad t-stat, or just dam_cold.
t-stat is flaky, jerking open. slamming shut. per infra red thermometer and ebpv action. will change it this weekend for an oem t-stat. the card board made a big difference in driveability.
and thanx for the correction on what i called a wastegate. lookin at your tuner list, impressive but greek to me can you refer me to a reading list?
MSJ
Senior User
Joined: Apr 2004
Posts: 185
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From: Taylorsville, KY
I am having troubles with the ebpv on my truck now too. I am getting ready to put a new exhaust system on it in a week or two and was wandering what it would take to gut the ebpv while I have the down pipe off?
Franklin
Franklin
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Joined: Oct 2003
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From: MICHIGAN
Originally Posted by frnkln2003
I am having troubles with the ebpv on my truck now too. I am getting ready to put a new exhaust system on it in a week or two and was wandering what it would take to gut the ebpv while I have the down pipe off?
Franklin
Franklin
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Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
No problem, if unplugging the ebpv doesn't solve your problem you may want to check your AP (accelerator Pedal). It's a potentiometer and may worn or broken that will cause dead spot.
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Playing in the Dirt
Joined: Oct 2005
Posts: 2,302
Likes: 1
From: Southwest Georgia
MSJ, try this for lots of info on our trucks: http://pages.prodigy.net/stevebaz/_i...az/index3.html
This site has alot of info on stock engine, how injector system works, coolant additives, etc. : http://www.intellidog.com/dieselmann/home.html
If you have any more questions just ask. This is the best help forum that I have found for our trucks. And welcome aboard.
This site has alot of info on stock engine, how injector system works, coolant additives, etc. : http://www.intellidog.com/dieselmann/home.html
If you have any more questions just ask. This is the best help forum that I have found for our trucks. And welcome aboard.
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