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Old 08-07-2009, 03:39 PM   #1
mlambert77
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1999 SL2
Wrench Which EGR passageway should I clean?

I read on a post here once before, though can't find it now, that you should keep debris out of one of the EGR passageways/tubes.

I've had a lot of rough idle lately and I cleaned the EGR valve, which has helped some, but not a lot so I'm going to clean it again. I haven't cleaned the actual tube yet, and was wondering if I needed to clean out both tubes or just one?

I plan on spraying some carb cleaner down the tubes, letting it sit for awhile, then using a gun cleaner brush to break up the deposits hopefully.

There are some good instructions on here about how to clean the EGR valve itself (especially Richpin's), but haven't been able to find anything good on the passageway/tube.

'99 Saturn, 159000 miles.
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Old 08-07-2009, 03:52 PM   #2
quantumech
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2000 SL1
Default Re: Which EGR passageway should I clean?

Rev the engine with the EGR removed, that should blow anything that is on the exhaust side out, but it'll be kinda loud.

I don't believe the other side gets gummed up...at least, don't think I've seen anyone mention it.

As for the rough idle, when was the last time you looked at/changed your plugs and wires?
...
Sasha: 2000 SL1, Manual, cracked head Sept. 2014. Donated Dec. 2014

I learn from my experiences. If I screw up, I'm sorry.
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Old 08-07-2009, 04:06 PM   #3
mlambert77
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1999 SL2
Default Re: Which EGR passageway should I clean?

Quote:
Originally Posted by quantumech View Post
Rev the engine with the EGR removed, that should blow anything that is on the exhaust side out, but it'll be kinda loud.

I don't believe the other side gets gummed up...at least, don't think I've seen anyone mention it.

As for the rough idle, when was the last time you looked at/changed your plugs and wires?
I changed the plugs this weekend, the wires about a year and a half ago. I do have a worn/stuck compression seal. Don't have the $1500 to fix the heads now so been watching oil consumption. Plan on doing a MMO soak this weekend, see if it helps any.
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