» » »

Chevrolet Q&A

Ask Your Question

1994 Chevrolet S10 Blazer Question: EGR Vaulve Sticking open



lildude0127, French Gulch, CA, February 02, 2009, 16:30

how do we get this from sticking. it usually only does this when we change elevation.

1 Answer
Flag This
  • Answer #1

    February 02, 2009, 16:53

    The problem may be with the EGR valve or carbon build-up in the engine. Carbon bits can work their way loose when the engine is under heavy load - climbing hills. The carbon can stick in the EGR valve holding it open. The valve may or may not clear itself out. Performing a "top engine decarbonization" procedure may help or correct this condition. Any good repair shop should be able to perform this procedure, It may be a bit complicated if you have never done it before. If the engine decarbonization does not correct the problem you may need to replace the EGR valve.

    Flag This