Took my 06 Nightrain from 88 - 95 cubes and keep getting 'No Combustion' codes any ideas. Thanks, Matt. 

Have you changed the plug leads. Some of them don't like after market leads and they throw those codes..

Hey guys sorry for the slow reply. It does run, heaps better than it did b4 the upgrade and im back to stock coils leads and plugs and still keep gettin codes. Im thinking it has something to do with the canned map i put in it after going from 88 to 95. It runs pretty well but not as good as it could be. Im in the middle of installing O2 sensors so i can 'smart tune' with the SEPST. Im hoping its just the tune coz ive done everything the manual tells u 2 except new ecm, but i thought if it was ecm i would get codes for that too!!