[aggie8387]

I have a 95 blazer with 159k miles that has repeated problems with the EGR valve. It has been replaced several times, but it doesn't stay "fixed" for long. The SES comes on an goes off after a day or so. I have low power off a start and it makes a low, hollow, thumping sound when accellerating after a stop. It runs fine above 25mph. I have very limited knowledge of engine repair, but am willing to learn.