I have a 1997 Acura Cl 2.2. The check engine light is on for the last six months. I changed the egr valve and did a full tune up. Still no luck. Please let me know if I can do anything else.

 

Take it to autozone and have them pull the code... they'll tell you what you need to fix

 

it say insufficient egr flow...this was the same code before changing the egr valve and cleaning the egr passage.

 

did you reset the code after you cleaned the egr valve and pipes?

 

i have reset the code several times..comes back on after driving an hour

 

Have you checked if any hoses going to the egr are leaking(air) or dameged?

 

nope..can I do it on my own?

 

yeah you can follow the hoses and try feel for any air escaping

 

Was the EGR manifold removed and the intake manifold openings under the EGR manifold cleaned and opened? If not, this is your problem. It's also possible that a blockage has occured in the EGR passage from the EGR valve to the EGR manifold. Rod that out also.

When engine is fully warm, raise idle speed to ~1500 rpm, and remove the vacuum line to the EGR valve. There should be vacuum available and you should see valve bellows move when you remove the vacuum source. If vacuum is available and valve is moving, then EGR flow is blocked somewhere; EGR valve, EGR passages, EGR manifold, EGR manifold ports to intake manifold.

good luck