MERX2006 Posted November 15, 2011 Report Share Posted November 15, 2011 (edited) 1st be aware a friend power washed engine without covering certain parts. Upon 1st crank the SES lights and stay on 99.9%. Scanner show a EGR Valve Code Solenoid error 2 & 3. It has been brought to my attention that carbon build-up causing same code with the 1994 Century 3.1. ( I changed EGR VALVE - SES remains on ) My next step is to start complete carbon build-up cleaning. ( EGR PORT, THROTTLE BODY & MAYBE MANIFOLD )>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> experienced knowledge wanted <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Edited November 15, 2011 by MERX2006 Quote Link to comment Share on other sites More sharing options...
AL Posted November 15, 2011 Report Share Posted November 15, 2011 (edited) Heres a walk through Edited November 15, 2011 by AL posted a different link Quote Link to comment Share on other sites More sharing options...
alec_b Posted November 16, 2011 Report Share Posted November 16, 2011 Just had to do this on a '02 Impala with the 3.4, recurring EGR low flow code. The intake ports were completely plugged with carbon. Took a good hour to clean it out. I had to remove the throttle body as well, there was no way to get in there with it in place. Quote Link to comment Share on other sites More sharing options...
MERX2006 Posted November 16, 2011 Author Report Share Posted November 16, 2011 Just had to do this on a '02 Impala with the 3.4, recurring EGR low flow code. The intake ports were completely plugged with carbon. Took a good hour to clean it out. I had to remove the throttle body as well, there was no way to get in there with it in place. Thanks for input. It appears worth rating @ 5 stars. Quote Link to comment Share on other sites More sharing options...
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