Took the EGR valve off the intake last night. The inside was all full of black carbon crud. The little plunger still goes up and down. Can somene share some thoughts on the way to tell if this is functional. I see new ones listed for $100 plus. See used ones that say they were tested on ebay.
The quick way to tell if it's working is to apply vacuum to it while the car is running. The car should die. Don't buy a new one until you've tried cleaning yours. Also check the channels to see if there is a lot of build up in them too. Is there a problem or are we just pulling off random parts to see how they work?
Dr_Snooz
"I like to take hammers, and just break stuff, just break stuff." - Beavis
1989 Honda Accord LX-i Coupe, 240k miles, MT swap, rear disc swap
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Well, the car ran terrible months ago before I started to tear it down for a rebuild. This is a learning process for me and trying to eliminate potential future problems that can be resolved while it is still out of the car and intake and carb are apart and off the block. The egr was all full of carbon. Guess thats not unusual for a 200K carbed 3g? Thanks for the suggestions.
Last edited by parkersnine; 10-17-2009 at 07:23 AM. Reason: punctuation
EGR (Exhaust Gas Recirculation) the soot is carbon from the combustion chamber builds up over twenty years. If the diaphram is intact replace vacuum hoses, clean the ports. Worst case you'll have to pull the intake off for a through cleaning.
Some use Sea foam for this purpose. Just had to help my son with his EGR. It was a broken vacuum line.
Phil
Is that the Deep Creep? Thanks for the tip...
suck on the hose make sure it holds vaccum.
1988 Honda Accord LX-i Coupe 123k miles.
I knew you sucked hose! Ha ha ha haOriginally Posted by Civic Accord Honda
Phil
100% agree; If the car is carbed then that's all the functional checking.
If it is EFI then you need to check the electrical circuit (plunger position) too, but yours is carb. right? (I would expect a code 12 with a malfunctioning EGR valve)
For better cleaning I would submerge the lower part of the valve on carb cleaner to soak up the carbon and loosen it.
ONLY SUBMERGE THE LOW PART OF THE VALVE, MAKE SURE CLEANER DOES NOT TOUCH THE DIAPHRAGM.
Last edited by ecogabriel; 10-17-2009 at 03:54 PM.
If it ain't broke... I fix it!
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