EGR valve
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From: Dallas Ga.
EGR valve
I wonder if I get a set of headers for my 2000 California v-10 now in Ga. that does not have the egr valve bung, if I can make a block off plate for the intake and run without it? I do not see a transmitter on the valve , so the computer may not know its gone? Anyone?
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Joined: Jul 2002
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From: Long Island USA
Curiouser and curiouser, I just posted that 00 and up didn't have EGR's, I guess I was wrong 
But then, it's an Excursion...
If there is no DPFE, I guess you can just block it, but I'm sure that the PCM is assuming it's going to be there and adjust the mix/timing to counteract the effects of the EGR.
So you might have a light-throttle lean condition... or rich? Sheesh...
But then, it's an Excursion...
If there is no DPFE, I guess you can just block it, but I'm sure that the PCM is assuming it's going to be there and adjust the mix/timing to counteract the effects of the EGR.
So you might have a light-throttle lean condition... or rich? Sheesh...
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Joined: Oct 2006
Posts: 4,171
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From: SE Texas
Curiouser and curiouser, I just posted that 00 and up didn't have EGR's, I guess I was wrong
But then, it's an Excursion...
If there is no DPFE, I guess you can just block it, but I'm sure that the PCM is assuming it's going to be there and adjust the mix/timing to counteract the effects of the EGR.
So you might have a light-throttle lean condition... or rich? Sheesh...
But then, it's an Excursion...
If there is no DPFE, I guess you can just block it, but I'm sure that the PCM is assuming it's going to be there and adjust the mix/timing to counteract the effects of the EGR.
So you might have a light-throttle lean condition... or rich? Sheesh...
JL
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Posts: 4,171
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From: SE Texas
JL
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From: Dallas Ga.
I thought the egr valves purpose was to inert the combution chamber with exhaust gas [ less oxygen ] , to cool it down somewhat to reduce oxides of nitrogen. how would that effect mpg?
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From: SE Texas
Exhaust gas that takes the place of fresh air in the combustion chamber effectively reduces displacement.
Less fresh airflow into the engine=less fuel required to meet the target air/fuel ratio.
JL
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From: SE Texas
Low-load (cruising,etc) is when EGR is used. This because you have less available power due to the extra exhaust gas in the combustion chamber. When cruising,your truck needs very little power to maintain speed-the rest is
pumping loss in unnecessary displacement. When you tip into the throttle(and need more displacement/power),the PCM sees the load change,and decreases or shuts off all EGR flow to allow full power.
JL
pumping loss in unnecessary displacement. When you tip into the throttle(and need more displacement/power),the PCM sees the load change,and decreases or shuts off all EGR flow to allow full power.
JL
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