5.3 to 6.0 Swap

[DMC10140]

I just got my 6.0L engine to swap into my 04' that had a 5.3 engine. The engine I got has the 3 bolt throttle body, and has 9k miles on it. If I want to keep the 6.0L intake and throttle body, what do i need to do. I have been lookingat post and haven't found a good answer. everything looks the same right down to the fuel rails.

[molitor]

Install it, if it all looks the same, that means it will work the same and everything hooks up the same. Hurry up and stab that thing!

[DMC10140]

Going to start tommorow. We have been trying to figure out wht cam we want to use.

[DMC10140]

Ok the motor is in and starts right up. I'm trying to figure out why the motor is stumbling. It is comming up with a random/multiple misfire code. Any ideas.

[flattopwill]

Could be a lot of things but is probably something simple. Check to make sure your plug wires are on all the way, check health of plugs. If it continues test your coils.

[DMC10140]

That is what I am hoping for. The plugs and wires are all new. The one header is leaking where the downpipe attaches to, hopefully that is the major issue.

[DMC10140]

No go, still won't idle. Runs great at 1000rpms and higher. I think the tune needs to be adjusted. I'm going to call Nelson tommorow.

[ecld_07]

5.3 tune limits the 6.0. tune will do wonders

[msl85]

5.3 tune limits the 6.0. tune will do wonders

ya, after we swapped out my 4.8 for a 6.0 i got murdered by a v6 5speed single cab gmc, but after i got my nelson tune i smoked him, a programmed titan, and a programmed 05 5.3 single. there beast with just a tune

[flattopwill]

OH! Well ya if you still have the 5.3 tune then of course its not gonna run right.