hello everyone how are all of you doing,
i have a 93 ext cab 2wd 5.0 tbi chevy silverado iam having so issues with it well i took out the original 5.0 engine only replaced with a vortec roller 5.7 liter purchased new manifold from gm that let me keep evrything the same computer, harness, etc. swap is done runs great sometimes but i get alot backfire thru the tbi and exhuast when i get these backfires i lose alot of power from the engine engine light goes off run like crap till engine light turns off runs fine after it is a everyday occurence engine codes i get are 42,35,21,12 check timing replaced o2s
injectores in tbi everything is all new except tbi i cant get backfiring to stop all out of ideas any help would be greatly appreciated thanks in advance
