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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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  #1  
Old 03-22-2007
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Egr?

is it possible to remove this without any probems? is it a good thing to remove it?
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Old 03-22-2007
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the rangers that don't have an egr have the same intake. there's a cover plate blocking it off. based on that I would say no problem except for breaking an emmissions law.
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Old 03-22-2007
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eh if you dont have inspections like MI there isnt a problem. on my 1986 f-150 i made a block off plate and took the EGR off but well that was an old carb vehical
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Old 03-22-2007
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we don't have inspections...........hummmm i wonder if i can find a '97 without 1 for the plate


will it help anything?
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Old 03-22-2007
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i just mechined a flat plate out of alum i think or maybe it was steel gosh that was 5 years ago maybe more.. made up a gasket from gasket material. i only removed it cause my computer was throwing a code that the ERG was dead, and well its an old carb truck it really didnt need that **** so ya... nothing changed...
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Old 03-22-2007
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Quote:
Originally Posted by lifted97ranger
will it help anything?
EGR does not hurt performance, it does reduce NOx emissions, and it may slightly improve fuel economy. There is no benefit to removing it. OBDII will set a CEL and a DTC for a missing EGR valve.
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Old 03-22-2007
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I was under the impression that the only time the PCM opens the EGR it is at idle and under cruise conditions, when any performance loss would be negligable and unnoticable by the driver any ways. So I personally don't really see a point to removing it either, IMHO.
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Old 03-23-2007
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Quote:
Originally Posted by ViperSpec
I was under the impression that the only time the PCM opens the EGR it is at idle and under cruise conditions, when any performance loss would be negligable and unnoticable by the driver any ways. So I personally don't really see a point to removing it either, IMHO.
EGR is active only at part throttle under moderate load. It is turned off both at idle and at high load conditions.

You are correct. Properly calibrated, EGR is nearly or completely undetectable. It has no affect on performance driving because it is turned off at anything near WOT.
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Old 03-23-2007
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I say keep it Maurice.
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Old 03-23-2007
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i am gonna.......just thought i would ask.....i saw on another forum were someone got rid of it.......just curious...
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Old 03-23-2007
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Bob, if the CEL comes on b/c of a missing EGR shouldn't ALL newer rangers have an egr?

I've been halted in my header purchase by the damn thing. Why is it that some rangers have them on the drivers side and some on the passenger side. Then, there's the option of no egr at all. What gives??
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Old 03-23-2007
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if there isn't one from the factory, it is not written in the PCM program.......

the designers of the 4.0 were drunk when they were designed.....
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Old 03-23-2007
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Quote:
Originally Posted by l2en
Bob, if the CEL comes on b/c of a missing EGR shouldn't ALL newer rangers have an egr?

I've been halted in my header purchase by the damn thing. Why is it that some rangers have them on the drivers side and some on the passenger side. Then, there's the option of no egr at all. What gives??
I'm reasonably sure that all Ranger 4.0 SOHC that have EGR are on the driver side. If I'm not mistaken, it is some of the Explorers that have it on the PS.

A stock 2003 4.0 Ranger doesn't have EGR at all. So you can buy the headers made for no EGR or you can buy them for EGR and cap the port on the collector.

Manufacturers install EGR when it's needed to pass emissions and leave it off when it isn't. I don't know how to explain the lack of EGR on 2003 4.0's when the 02 and 04 have it. The cats or something else may be different. Lots of stuff in the engine/exhaust hardware and in the calibration can be juggled to meet emission requirements. There is not just one unique "formula" that gets it there.

The calibration strategy allows the EGR and its OBDII monitor to be turned off when the hardware isn't present. Each year/engine/trans/etc has a unique calibration burned in the PCM so it isn't a problem to turn it on or off in any particular year or powertrain combo.
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Old 03-23-2007
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Old 03-24-2007
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Quote:
Originally Posted by rwenzing
EGR is active only at part throttle under moderate load. It is turned off both at idle and at high load conditions.

You are correct. Properly calibrated, EGR is nearly or completely undetectable. It has no affect on performance driving because it is turned off at anything near WOT.
Yeah, where I got my idea from was the general use of EGR systems, not vehicle specific to the Ranger, so thank you for clearing that up for me. I understand that in older vehicles, where the system was controlled more by vacuum and not by the computer there were often issues with it sticking open or being slow to close, causing issues from pinging to misfireing in a specific cylinder. Perhaps it's from these old systems that people get their distrust of EGR. On newer vehicles, removing the EGR theoretically should show no gains in performance. Yet you always get people claiming the opposite. I think this is a debate that shall continue on for a long time to come. :P
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