What dose the EGR Value do?
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Joined: Sep 2000
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From: KY
What dose the EGR Value do?
I have a 1989 Ford F-150 with a in-line six. What does the egr value really do? Will it give me better performance if I disconect the green vacuum line and leave the erg value on?
Elder User
Joined: Jan 2000
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From: Villa Ridge, MO
What dose the EGR Value do?
EGR stands for Exhaust Gas Recirulation. It only works on higher RPMs to add an inert gas to the combustion chamber to lean out the mix some what to prevent knocking (predetonation) and to reburn some of the gasses that might have not entirely burned the first time around to lower emissions. I talked to my boss about this the other day and i might have some of it a little bit off but for the most part i think its right. As for disconecting the EGR from the vacume....i believe if it is there, use it....because if you just elimiate one aspect of the emission system you partially disable it. Maybe messing up some of the readings of the O2 sensor. I would leave it be. You will not notice anything beneficial. If i have mis informed anything, anyone feel free to fix me! haha!
Dan "Mudinford" MacDonald
Dan "Mudinford" MacDonald
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Joined: Jun 2000
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What dose the EGR Value do?
As Mudinford stated EGR stands for Exhaust Gas Recirculation. Its purpose is to obviously recirculate exhaust gases and the reason is this. By inserting small amounts of exhaust gases into the fresh gas/air charge of an engine, lowers the internal combustion temperature and therefore reduces the amount of NO or nitrous oxide the engine produces. On some engines the EGR system drastically reduces internal combustion temperatures. There is an example in a book named "The Ford Owner's Bible" by Moses Ludel in which an engine had an i.c. of 4600F was reduced to 2600F thru the EGR system. This is the only emissions reduction system that actual as no power robbing side effects. Every literary source I have read indicates the EGR system DOES NOT rob the engine of horsepower or fuel economy. So leave it intact and make sure to keep it in good shape. It was installed on most vehicles starting around the late 70s.
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