In need of 4G Eclipse EGR valve info

[Blinkyblinx9]

What do we know about the 4th gen EGR valve. I did some rough looking around online but wasn't able to find any definitive specs. The info I'm interested in specifically is whether or not the bolt holes and ports line up and how does the solenoid operate. From what I could find the mounting pattern looks really close and it appears that the valve is actuated by a stepper motor similar to our IAC. If it's as it appears then I'm fairly positive that when I switch to TBW that I can finangle my aftermarket ECU into operating it but I dont know what its maximum switching frequency is or anything.

The idea is to eliminate the EGR hoses and see if I can fine tune EGR control to improve part throttle efficiency. I also want to play with antilag a little. Nothing serious just some timing retard and enrichment then crack the valve open for a moment when I let off the break to allow a shot of that miniscule 5lb of boost I'm generating into the exhaust. I don't necessarily want more than 5lb when break boosting because that gets difficult to hold back even if I pull timing during a launch but a bump response as I let go would be nice. Any in depth details as to the fit and operation would be much appriciated.

 

[chrysler kid]

You are incorrect in your assumption about the valve itself and what it looks like.

The egr valve is separate from the solenoid, and the solenoid is mounted on the firewall connected by vacuum tubing. The egr valve itself is on the intake manifold and vacuum operated by the solenoid to open. The manifold differential sensor on the intake manifold monitors the egr vacuum to determine if it is open or closed during the correct conditions.

 

[Blinkyblinx9]

You are incorrect in your assumption about the valve itself and what it looks like.

The egr valve is separate from the solenoid, and the solenoid is mounted on the firewall connected by vacuum tubing. The egr valve itself is on the intake manifold and vacuum operated by the solenoid to open. The manifold differential sensor on the intake manifold monitors the egr vacuum to determine if it is open or closed during the correct conditions.

The rest of what you are asking isn’t relevant, the egr valve being open would reduce exhaust pressure

I tried to make my post as clear as possible. Its even right in the title. I am looking for information on the 4G EGR valve. Not the 2G EGR valve.

In hindsight it looks as if you didn't even bother to read ANY of what I wrote.

 

[Stapl3]

Every brand of EGR gasket I look at on rockauto is a different part number from dsm to 4g. Looking at pictures of them, it looks like the difference is the two ports on the 4g are larger diameter. Assuming the 2 bolt holes are the same, I'd think it would work, heck you could even port out the manifold a little for more flow to the larger 4g EGR.

Interesting idea.

 

[Blinkyblinx9]

Every brand of EGR gasket I look at on rockauto is a different part number from dsm to 4g. Looking at pictures of them, it looks like the difference is the two ports on the 4g are larger diameter. Assuming the 2 bolt holes are the same, I'd think it would work, heck you could even port out the manifold a little for more flow to the larger 4g EGR.

Interesting idea.

Yeah, if nobody knew anything I was thinking about hitting up some scrap yards in my area to see if I can get a hold of one cheap. Even if it doesn't work I can at least collect some data. Port and bolt hole distances and diameters, resistance specs. If everything checks out I'll hook it up to my ECU to check it's range in steps and see what it's max frequency is. 4g forums don't have much of any info other than a wiring diagram identifying it as a stepper motor that's wired much like our IAC.

 

[chrysler kid]

I tried to make my post as clear as possible. Its even right in the title. I am looking for information on the 4G EGR valve. Not the 2G EGR valve.

In hindsight it looks as if you didn't even bother to read ANY of what I wrote.

So you just wanted me to tell you how to wire in a “4th gen egr valve”. What is a 4th gen? 4th gen eclipse? Your title says “4g egr valve” as in 4g63

Are you asking if anyone here has used a last generation eclipse egr valve and found the pinouts to use the stock ecu to control it? Nah man, no one’s done that. You’re quite clearly the expert on “4th gen eclipses”

 

[Blinkyblinx9]

So you just wanted me to tell you how to wire in a “4th gen egr valve”. What is a 4th gen? 4th gen eclipse? Your title says “4g egr valve” as in 4g63

Are you asking if anyone here has used a last generation eclipse egr valve and found the pinouts to use the stock ecu to control it? Nah man, no one’s done that. You’re quite clearly the expert on “4th gen eclipses”

Are you trolling me or did you reply again without reading it? Lol I'm not quite sure what else a 4G would mean.

I assumed it was well understood by the context of my post as well as within the DSM community that if somebody asks about a 4G (though not a DSM) they are referring to the fourth gen eclipse. I also said I was able to find enough info to assume that it's a stepper motor meaning that I had to have seen some kind of diagram at the least.

I'm pretty sure since it's a Mitsubishi that the pinout would be the same as our idle air control valve. I also said that after I switched to TBW that I could probably trick my AFTERMARKET ECU into making it work.

 

[Ludachris]

Lol I'm not quite sure what else a 4G would mean.

A lot of people refer to the 4G63 as 4G for short. Rarely is anything parts-related on a 4th Gen Eclipse discussed around here since there's so little cross over, so I could see where the confusion might come from. I updated the thread title to clear up any confusion.

 

[Blinkyblinx9]

That doesn't make any sense. 4g by itself If used in that context could refer to any of the engines within the platform. Also the second gen came with the 63 and the 64. Obviously they were different submodels but that sounds way too overgeneralized to be a thing. I suppose if that's the way it's done around here. Also it's not farfetched for somebody who has owned a DSM to have also owned a fourth gen eclipse. Seriously I can't be the first person who's looked at these two parts and thought to themselves "huh, I wonder if that'll bolt on there" even if just for shits and giggles.

 

[Ludachris]

That doesn't make any sense. 4g by itself If used in that context could refer to any of the engines within the platform. Also the second gen came with the 63 and the 64. Obviously they were different submodels but that sounds way too overgeneralized to be a thing. I suppose if that's the way it's done around here. Also it's not farfetched for somebody who has owned a DSM to have also owned a fourth gen eclipse. Seriously I can't be the first person who's looked at these two parts and thought to themselves "huh, I wonder if that'll bolt on there" even if just for shits and giggles.

Not saying it makes sense, just saying I've heard it and read it enough to understand the confusion.

Don't know that it's farfetched for someone who has owned a DSM to also have owned a 4G Eclipse... I doubt it's all that common, at least not nearly as common as the number of DSMers who ended up buying an Evo. But who knows.

I'd venture to guess that you might actually be one of the few people (if not the first) to look at an EGR valve on a 4G Eclipse and consider adapting it to a 4G63 DSM, considering how many DSMers either rip out the EGR valve or just change throttle bodies on these cars. I've never seen anyone trying to adapt a different EGR valve to an OEM throttle body, but that doesn't mean the discussions haven't happened here.

 

[Blinkyblinx9]

Not saying it makes sense, just saying I've heard it and read it enough to understand the confusion.

Don't know that it's farfetched for someone who has owned a DSM to also have owned a 4G Eclipse... I doubt it's all that common, at least not nearly as common as the number of DSMers who ended up buying an Evo. But who knows.

I'd venture to guess that you might actually be one of the few people (if not the first) to look at an EGR valve on a 4G Eclipse and consider adapting it to a 4G63 DSM, considering how many DSMers either rip out the EGR valve or just change throttle bodies on these cars. I've never seen anyone trying to adapt a different EGR valve to an OEM throttle body, but that doesn't mean the discussions haven't happened here.

Yeah, I wasn't able to find anything on it via the search function here. I'm the kind of guy that does things just because I can. The list of stuff is kinda long at this point. Speaking of I should probably update my profile. The car changes so often that it's hard to remember to do it.

I thought this might be a neat addition along side my ecoturd Moostang electronic throttle body project. The idea is to add a bunch of stuff like custom throttle mapping, tuning out the effect of spool up gradually pushing into boost when I don't want it to, ECU managed cruise control, as well as a couple other things that will hopefully provide better feel economy and responsiveness.

Your probably right in that many people wouldn't have much information on this. I seem to always ask one off questions here. Thanks for being cool about it man.

 

[Ludachris]

Innovation is what drives communities like ours. Never let the fact that it hasn't been discussed, or that someone else hasn't tried it or shared info on it deter you.

 

[19Eclipse90]

Take free information for what it’s worth, https://charm.li/ provides the following regarding the 4th generation Eclipse EGR valve:

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I looked up the EGR valve gasket in ASA and it did not match the DSM part number. That doesn’t necessarily mean they aren’t interchangeable - but it doesn’t help build any confidence, either.

 

[Drewpy Dawg]

It may be getting way too complicated for a quick and easy EGR repurposing, but plenty of cars have odd carburetor swaps using an adapter plate. Might be possible to make a relatively simple adapter plate to mate the 4g EGR valve to the DSM manifold. Just a thought.

 

[Blinkyblinx9]

I know it's late for an update but a few salvage yard parts later I can confirm that they are bolt on parts assuming you have an ECU that can use the electric valve. The valve I picked up is off of a 2008 4g64 eclipse and the gasket if from a local parts house listed as compatible with a 95 turbo eclipse.

On a side note I also confirmed that the 2010 Ford focus electronic TB almost bolts right up to our manifold. The holes are a little small and need to be drilled inward a little but they line up with the holes in the gasket.

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