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1999 Acura CL EGR vavle

Tiny
RMOERY
  • MEMBER
  • 1999 ACURA CL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 162,000 MILES
I replaced my EGR valve about 12 months ago per the check engine light code. However, I did not do it timely. The check engine light had been on for several months. My problem is even with a new EGR valve the check engine light continues to come on. I take it in and they clean it but it comes back on within a day or two. The mechanic says the valve is operating properly but something is wrong. Could carbon continue to build up for months after replacement? I need help!

Thank you.
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Friday, June 18th, 2010 AT 6:51 AM

4 Replies

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Yes, the problem is most likely a build up of carbon, in the tube, the vacuum hose or definitely in the intake manifold where the egr hose connects at. It will have to come off to be cleaned, or you may be able to do a top engine cleaning with some sea foam, but have some one do it that knows how, you may even need a couple bottles. Because its gonna be gunked up.
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Friday, June 18th, 2010 AT 9:22 AM
Tiny
RMOERY
  • MEMBER
  • 2 POSTS
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Friday, June 18th, 2010 AT 11:00 AM
Tiny
JEREMIAH
  • MECHANIC
  • 217 POSTS
The passage from the egr valve to the intake manifold is clogged with carbon. You will have to remove the intake manifold and open the passage, usually with a drill and 10mm bit. It's at the underside and start of the manifold. Careful not to drill through the other end of the manilfold.
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Sunday, June 20th, 2010 AT 2:06 AM
Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Yes, thanx for backing me up
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Sunday, June 20th, 2010 AT 8:36 AM

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