EGR missing from 95 3.0
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Junior User
Joined: Jun 2003
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EGR missing from 95 3.0
While changing out the PCV on my van I noticed that my EGR is not there. in its place is a plate. Should it have an EGR valve?, and with it missing will it cause any problems?
Former ******
Joined: Nov 2004
Posts: 4,901
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From: Salt Lake City, Utah
I do not believe the 3.0L had an EGR on any year, so my guess is there is not supposed to be one there, and I don't think the plate should be their either. Perhaps parts have been swapped in from another vehicle.
Post Fiend
Joined: Oct 2005
Posts: 5,242
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From: Kiev, Ukraine
I see many aeros w/o EGR. Aero easily pass emission test for NxOx without EGR. But Taurus with the same 3.0 has EGR.
I dont really concider EGR to be an effective way to reduse emissions. I compared Volvo truck (w/o EGR) and Scania (w. EGR) and difference is difficult to detect. The real way to reduce NxOx emissions is to use AD-Blue technology also known as SCR. But I think these emissions are not so harmful as we are imformed. Cars and trucks cause about 5-7% of harmful emissions in Europe, there is only one argument I agree with, that emissiones are close to drivers and passangers, especially it gridstops. But new expencive solutions are less effective then designed before and can not radically change the situation.
I dont really concider EGR to be an effective way to reduse emissions. I compared Volvo truck (w/o EGR) and Scania (w. EGR) and difference is difficult to detect. The real way to reduce NxOx emissions is to use AD-Blue technology also known as SCR. But I think these emissions are not so harmful as we are imformed. Cars and trucks cause about 5-7% of harmful emissions in Europe, there is only one argument I agree with, that emissiones are close to drivers and passangers, especially it gridstops. But new expencive solutions are less effective then designed before and can not radically change the situation.
Lead Driver
Joined: Sep 2003
Posts: 7,015
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From: SoCal
My older Aeros do not have EGR either. I'm thinking it's the low performance nature of the 4.0 heads that do not produce significant amounts of NOx that the catalyst can't handle.
NOx is responsible for the most visible and irritating forms of smog. It combines with water to form nitric acid, and encourages formation of sulfuric acid with the high sulfur fuels we still have in many places. Something we used to see in SoCal, in addition to the smoggy days that burns your eyes and lungs, is "acid fog". It's astounding to see surfaces of marble structures turn into powder and flake away from this.
NOx is responsible for the most visible and irritating forms of smog. It combines with water to form nitric acid, and encourages formation of sulfuric acid with the high sulfur fuels we still have in many places. Something we used to see in SoCal, in addition to the smoggy days that burns your eyes and lungs, is "acid fog". It's astounding to see surfaces of marble structures turn into powder and flake away from this.
Former ******
Joined: Nov 2004
Posts: 4,901
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From: Salt Lake City, Utah
That and the EEC-IV system in the Aero uses oxygen cycling to control NOX, which is more effective than ERG anyway. The vehicles size scores it some exemptions as well versus a Taurus, which is a much lighter car. The EPA ratings are based upon GVW and not engine size, so the Aerostar is much cleaner on a basis of its weight than the Taurus. The Aerostar also uses 2 inline catalysts and one of the 2 is designed for NOX, while the Taurus uses on on each bank, and they both have to handle NOX and HC/CO.
