2001 Blazer flashing SES light

Upon moderate acceleration the SES blinks for a period of time and then stops but stays on when I resume normal driving. Any ideas why it may be blinking? I have to get the codes read and or cleared. Just thought I would post to see if anyone had any ideas or had a similar problem.

A blinking SES light usually indicates multiple misfires detected which would be a PO300 code. Get the computer scanned and post the codes. Have any parts of the ignition system been changed recently (cap, rotor, plugs, wires, coil)?

Well the darn light wont go off. The code is for cylinder 2 misfire. Changed the plug, cap, rotor, and wires with no luck. Any ideas what to look at next?