Hey guys,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
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Could you please help me understand how to disconnect the EGR valve connection to the pipe coming from the exhaust (not the 2 mounting bolts) on a 2.5L engine? I see two “connectors or couplings” with hexagonal shape immediately near the point of connection between the EGR valve housing and the pipe, but I don’t know which one to loosen first, and I don’t want to damage anything.<o></o>
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Please help.<o></o>
Thanks,<o></o>
Infante<o></o>

 

Disabling the EGR valve - Getting the most out of the Ford 2.3L Engine Website

 

Says someone who seemingly thinks that cheap CAI mod will improve economy too.

The EGR functions to lower combustion temperatures under conditions that would otherwise cause knocking and pinging. By preventing pinging, the fuel economy works out to be the same or better than a non-EGR vehicle because the computer can use more timing advance.

The recirculated exhaust gas contrary to that article does not alter the fuel to air mixture for two reasons. One, exhaust gas is mostly neutral as its oxygen content has been depleted. Therefore the fuel to air ratio (specifically the fuel to oxygen ratio) would be relatively unchanged. Secondly, the computer monitors the oxygen level in the exhaust, so if there is significant amounts of oxygen left over, that is taken into account. Therefore, contrary to the above article, the fuel to air ratio remains completely unchanged.

Now a malfunctioning EGR valve can penalize the economy.

 

just posted it because it had detail about how to remove, the guy also says that a compression ratio of 9.7 is way to high to add turbo induction, when ideally it's about 9.6.

The guy isn't too bright I think, but he definitely wrote a good portion about how to remove that part.

 

Well as far as removal instructions, it is an ok guide. I do also disagree with his ideas on the compression for forced induction. The main thins to deal with on Forced induction is tuning and making sure your engine parts can take it i.e. forged pistons, maybe stronger rods, heat resistant valves, etc. A higher compression can be dealt with by higher octane and maybe boost limiters. The rest is all tuning.

 

Wow, Guys, thanks for your responses, I really appreciate the help.
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>However, although I am a somewhat experienced Saturday mechanic, I still don’t understand with certainty what is the correct method of disconnecting the exhaust valve for the pipe coming from the exhaust (with intentions of replacing the valve), the article in the link does not explain this. Basically, when looking the pipe immediately next to the body of the EGR valve, there are two “coupling nuts” of hexagonal shape next to each other. Which one should I attempt to loosen first? Please help me understand if possible.
<o></o>Thanks, Infante

 

You can try to loosen them. Soak them in PB blaster overnight, soak a rag in the stuff and leave it wrapped on there. From there you need a hefty wrench to break those nuts loose. You should only need to do the one on the bottom of the valve itself.