wow, check your fuel pressure regulater. The PCM doesn't care if its a 4.8 or 8.1 if all the settings are correct. A base 4.8 tune when programmed correctly will run any size larger engine.
wow, check your fuel pressure regulater. The PCM doesn't care if its a 4.8 or 8.1 if all the settings are correct. A base 4.8 tune when programmed correctly will run any size larger engine.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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