engine misfire at speeds between 45 and 55,fluctuating rpms on 2001 Chevrolet Blazer

truck runs fine except between this speed

by in Slatington, PA on January 14, 2013
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , January 14, 2013
Do you have any check engine codes? If so, get read and post. It sounds like either a misfire condition or or an intake/exhaust flow issue. Need to get comp. read to see if any codes are present.