Ok I have a 99 Tahoe. Misfire on cylinder 5. Did new injector update. No fix. Redid it thinking maybe bad part. Still a no go. Compression is a little over 150. New plugs and wires. It's getting spark as I can see the new plug looks to have a burnt tinge and pulled the wire off the plug and watched it popping. No air leaks anywhere. Also traced the wire from computer to inlet plug and it's getting the pulse to open fuel injector. Has anyone ever had this problem? I don't know what else to check.