I have 2003 blazer with a 4.3l that I have done some upgrade on. I have added a cam (Comp Cams 56-450-8), valve springs, marine intake manifold, injectors (bosch 0280158165), cat delete, and straight exhaust. I have roughed in the maf and ve table tunes along with updating the injector data. I have a problem with excessive popping coming from the exhaust when at idle or deceleration, but not as frequently. I tried initially swapping the injectors thinking they were the problem, but that didn?t fix it. I found a hole in the y-pipe upstream of the passenger side O2 sensor and fixed that, but same thing. I have attached my current tune and a log file. I am unsure if there is a tune problem or a mechanical issue at this point. Any feedback from someone more experienced with tuning would be greatly appreciated.
200927-24lb-inj.hpl
200927-24lb-inj.hpt