EGR VALVE - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 05-23-2012, 06:48 PM Thread Starter
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EGR VALVE

What happens when you just unplug the EGR valve and let the gases just run out of the motor ? Will that hurt anything ? Thanks Dave
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post #2 of 15 Old 05-23-2012, 06:52 PM
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Certain years it actually disables the radiator fan when that plug is disconnected and it also give a check engine light...

06 350 CCLB
Edge CTS
Up-Pipes by Cutting Edge
ARP's
Bulletproof EGR Cooler
Coolant filter
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post #3 of 15 Old 05-23-2012, 06:54 PM Thread Starter
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I have a 06 and there isn't any light ?
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post #4 of 15 Old 05-23-2012, 07:14 PM
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You may have 'silent' codes resident in the PCM which do not set the CEL, but may show up on a scan. You can also leave the valve plugged in and just turn it off with an SCT; this may or may not set low egr flow codes depending on year and strategy. Neither will do anything to prevent the excess heat from affecting your coolant, nor prevent coolant from getting into the intake/exhaust and potentially blowing headgaskets, and/or rusting up the VGT vanes.

If you weld up both ends of the cooler or install one of the delete kits the opportunity to ingest coolant is greatly reduced; you may or may not need to have the valve plugged in to keep the various codes from being set. On my '04 some tunes need the valve plugged in, and some do not.
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post #5 of 15 Old 05-23-2012, 07:18 PM Thread Starter
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I have the bulletproof kit installed in a new rebuilt ford motor . I was just told I didn't need it plugged in . That maybe wrong ??
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post #6 of 15 Old 05-23-2012, 07:19 PM
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Unplugging the Valve really won't do anything for you. If your worried about the EGR system failing and leaking to a head gasket issue you should defiantly consider an EGR delete.

This is the kit I put on my truck. It is very high quality (all stainless) and you can't beat the price.

EGR Delete Kit | Ford 6.0 Liter EGR Delete

Its not a bad job to do yourself if you feel like getting to know your engine, their are a few really good write-ups on here for how to do it but if you want to have a mechanic do it expect to pay 6-8 hours of labor

Good luck and if you have any questions ask away, were always here to help!!!

Mike
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post #7 of 15 Old 05-23-2012, 07:21 PM Thread Starter
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by unplugging it the gases just go out of the engine and are not reused right ?
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post #8 of 15 Old 05-23-2012, 07:25 PM
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Quote:
Originally Posted by Dave Warner View Post
by unplugging it the gases just go out of the engine and are not reused right ?
Not as much of the gasses are re-used but thats not the real point of doing an EGR delete. The purpose is to keep the coolant from making contact with the exhaust gas by removing the EGR cooler and replacing it will a tube the directs the coolant back into the engine so it never comes in contact with the EGR cooler which can potentially flash boil the coolant and cause an overheating situation, simply unplugging the EGR Valve doesn't keep that from happening. Not to mention the common failure of the EGR Cooler itself which causes coolant to leak into the exhaust and into the combustion chamber, which can eventually cause a hydro-lock situation and weak havoc on your engine.

Not trying to scare you here, but it is possible and happens all the time. A true Full EGR Delete like the one I posted above it the only way to go

Mike
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post #9 of 15 Old 05-23-2012, 07:48 PM
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Quote:
Originally Posted by Dave Warner View Post
I have the bulletproof kit installed in a new rebuilt ford motor . I was just told I didn't need it plugged in . That maybe wrong ??
If it's not setting a CEL and the fan works, that's correct - unless it's setting silent codes AND you need to pass a smog check which involves a scan (some places do, some don't). Then you can plug it back in, clear the codes, and go back to business as usual after getting your cert.

My '04 never set a CEL, but gave me silent codes when the valve was unplugged on stock tune and one custom. On a different custom tune, as well as the canned SCT strategy tunes, it sets no codes with the valve unplugged.

Did you get the bulletproof egr cooler that is functional, or the welded-shut delete? In either case you probably have little to worry about, I was just curious.
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post #10 of 15 Old 05-24-2012, 04:30 AM
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Unplugging the EGR valve electrically may/may not effect other functions of the motor, depending on the year and ECM strategy.

http://www.ford-trucks.com/forums/97...egr-valve.html


http://www.thedieselgarage.com/forum...d.php?t=102838

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