misfire help

[1 bad blazer]

well i had so much trouble with the blazer this week that i'am ready to burn it to the ground. replaced the fuel pump twice . this morning i fired it up and it had a misfire. as i drove to work it got worse . do bad injectors sound the same as a burnt valve . i did replace the plugs fuel rail and with some spare injectors that i had in storage . now the p.o.s won't even start. since the fuel rails are off i might just drop a match. thanx in advance

[GasGuzzler]

Need to know more about what the vehicle is.