Stock 5.3 swap?
06-09-2018, 06:01 PM
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Stock 5.3 swap? I just did a 5.3 swap into a 1980 c10 for a buddy and something seems off with the tune. I've honestly never done a stock swap so I'm used to having to tune whatever swap I do for major changes. The truck fires up and runs off of the stock tune but the fuel trims were at +25 and it was running shitty. I put my wideband in and it was running lean. I added a bunch of fuel to the stock 've table and it got much better. Now I'm having to auto 've tune it as if it has mods done to it. I would have thought that a stock swap would have been good with the stock tune. The only things that have really been changed are no cats, different intake pipe, electric fan and egr/evap delete. Why would the stock tune be off by 25%? What are guys experiencing tune wise on stock swaps?
06-09-2018, 11:15 PM
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I just did a 5.3 swap into a 1980 c10 for a buddy and something seems off with the tune. I've honestly never done a stock swap so I'm used to having to tune whatever swap I do for major changes. The truck fires up and runs off of the stock tune but the fuel trims were at +25 and it was running shitty. I put my wideband in and it was running lean. I added a bunch of fuel to the stock 've table and it got much better. Now I'm having to auto 've tune it as if it has mods done to it. I would have thought that a stock swap would have been good with the stock tune. The only things that have really been changed are no cats, different intake pipe, electric fan and egr/evap delete. Why would the stock tune be off by 25%? What are guys experiencing tune wise on stock swaps?
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