Should I replace EGR tube?

SoFloBronco

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The previous owner removed and capped the EGR tube on the bottom of the EGR valve and at the intake. He also did a smog delete. I will be replacing the engine next month (5.8) and was wondering if it makes sense to put the EGR tube back on the new engine. I understand that it may help with gas mileage. Are there any other concerns with replacing it since the other emissions stuff has been removed?
 

miesk5

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Yo,
I suggest installing the new tube
Ford Broncos, F Series, etc.
PCM will not operate the EGR valve when;
engine is cold; engine is at idle; engine is at WOT; At low ambient temps (water vapor from the exhaust can freeze on the throttle plate);
engine warmed up to normal operating temperature. TPS at partial throttle.
TPS not at Wide Open Throttle (WOT).
MAP/MAF must be indicating light or moderate load. A certain amount of computer clock time has to be elapsed.
And the EVR is a "normally closed" solenoid, which means that when it is de-energized, the position of the disc allows for maximum venting to the atmosphere (resulting in negligible vacuum flow to the EGR valve).

Testing;
There shouldn't be any vacuum at the EGR valve at idle or any time your BUTT, (LOL ) is under the hood fiddling with it, to put it plainly, except for perhaps a very light residual vacuum from the EVR. Check al, of your vacuum lines first, and the vacuum reservoir for leaks.

Consider purchasing a new tube from https://www.pciinc.com
Great folks!
 

Skitter302

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If you don't have to pass emissions testing for vehicle registration I would skip the EGR. The EGR allows hot gases and dirt into the intake. Keeping it blocked off removes the heat and soot and reduces the chance for a vacuum leak.
 

kenrh

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BS that it improves mileage. It is the same as starting a nice camp fire them pouring some water on it.
My pipe has been disconnected/ plug inserted. Runs as good or better.
Newer systems are OK
 

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