I have a 2007 Chevy 1500 hd with a 6.0 that I had a truck Norris cam in.I took the truck Norris cam out and put it in a 5.3 to drop the 5.3 in the 2007 Chevy 1500 hd kept the same wiring harness and computer just swapped intakes becase the 5.3 had an intake with drive by wire and not sensor for the throttle body at the gas pedal as well as the fuel rail.Im having an issue of a crank no start with fuel coming out of my exhaust?I pulled fuel rail to check for any stuck fuel injectors and I see none I checked for spark and I do have spark. I’m thinking Maybe spark and fuel timing is off.How should I go about this.im new to this site Anything helps

 

Take the whole Intake setup that was on that 6.0l, and put it on the 5.3l you put in. The only thing in this case you needed to change was the Long Block, everything else that was factory with the 6.0l needs to go on that 5.3l.

Throttle Body, Injectors, Fuel Rail, whatever else are not Engine specific, they are more specific to the computer and tuning.

 

Correct I swapped everything from the 6.0 block over to the 5.3 except the heads.The computer was tuned for the truck Norris that I took from the 6.0 and put into the 5.3 again same cam same computer.i have spark and fuel injectors are firing making me believe this is no ground issue nor crank shaft sensor being both cranks are the same in the 5.3 and the 6.0.Again I’m having gas leak out the exhaust making me believe the gas is not being ignited correct?

 

Two ways to read what you typed.

So you have all the stuff that the truck originally had on the new 5.3l setup?

You check to make sure the Crank Sensor is plugged in?

 

I took a 6.0 out of a 07 Chevy 1500hd and replaced it with a 5.3.i swapped everything from the 6.0 over to the 5.3 except the heads,crank shaft and pistons.when I go to crank the 5.3 I now get a crank no start.i noticed fuel leaking out the exhaust manifold.To help problem solve I’ve checked for any stuck open fuel injectors by⚠️unplugging the coil packs⚠️ and removing fuel the fuel rail then proceeding to crank the engine.Ive checked for spark and I do have spark.
my thought process is seeing I have fuel and I have spark but no combustion because the gas is coming out the exhaust as a liquid not fumes.
i apologize for the complication I’m a student to the game trying to learn I’m all ears
ps.could maybe air intake be the problem?I do not have my air box and front all fully plugged in I wanted to make sure I got everything running before putting the radiator and everything on the front back on.i do have the electric throttle bottle plugged in

 

Well, no MAF plugged in it won't get the Air Intake Temp reading and be super rich as a default.

Put it all together with everything on it then try to start it.

 

What year truck did the 5.3 come out of?
you said it had a drive by cable TB originally?
(Sorry, this was a hard tread to read)
Could you be dealing with a mismatch due to crank reluctor wheels?

 

The 5.3 came out of a 2003 Chevy Tahoe I believe,which was then placed into a 1999 Chevy 2500hd

 

I’ll finish putting all the front peace’s on and see from there,thank you

 

All Gen III stuff from what I gather but yea hard to read is an understatement..

So we have a 1999 and a 2007 truck this 5.3l is in now?

What's going on here.........

 

Long block shh.