ok, so I'm new on here but I have no where else to turn as I am lost.
So I did a engine swap in my 2004 ford ranger, I took a 1999 3.0 motor and stuck in it and used the 2004 wire harness as I had no choice.
After a few issues I finally got it started but it lugs bad. It has no power and doesn't want to go over 3000 Rpms. I checked MAF and it's fine, fuel pressure is good, cat was a little plugged but I unbolted it and truck still acted the same. My thoughts are the vacuum lines, see the plenum on the 99 is different and it had an egr on it as well and the 2004 does not, so I had to plug the port for egr and plug the vacuum port Where the unburned exhaust gas would cycle back into. So I have to like combine the vacuum diagrams or something idk I'm just so confused.
sombody please help.

 

Welcome to the forum

So your 2004 was a 3.0l which was not Flex Fuel

And the 1999 3.0l was also not flex fuel(they had different fuel injectors)

Your 2004 3.0l upper and lower intake should have been swapped over to the 1999 3.0l engine, direct fit, that way all the wiring, injectors, and no EGR would have been done

You can't use the Engine wiring connector for '99 on an '04, pins were in different order, but you said you used '04 wires?

Best bet at this point would be to connect OBD2 reader to vehicle and see what computer tells you is missing or wrong.

Bluetooth OBD readers are under $40, and work with Free APPS on any smartphone or tablet, $5 APPs have more details but start with the Free ones

 

Hi, ROND thanks for replying, see I wanted to use the 2004 intake but it is a hard plastic and uses 5 small bolts and the 99 has an aluminum with 6 beefier bolts, so you see it wouldn't bolt up so I had to use 99 intake and I just plugged the vacuum port on the intake that went to egr and made my own block off plate to cover where the egr bolted up. And as for wiring I took all necessary sensors and plugs from the blown 2004 engine and put on the 99 engine so the 2004 harness would plug up to everything, and it started and ran but lugs bad and has no power. I have an obd ll code reader and the code it gave me was: P0340 generic camshaft position sensor A circuit (bank 1 or single sensor) can you please explain this? I'm new trying to learn mechanics and am fuzzy on things. Thank you in advance, really appreciate the help!

 

You have to swap whole intake, not just upper intake
That way it's a direct fit and same injectors

1986 to 2008 3.0l Vulcan used same head and block alignment, so complete intake from an 1986 will bolt to a 2008

Any time you have an OBD code you need to look it up on an OBD LIST, NEVER just the one code number, that will just get you mostly the wrong information.

Engines use a large number calculator, which is a "computer" in its original terminology, it computes large numbers, which is all the first "computers" did, they were used to break codes and calculate artillery shell vectors.
Now-a-days Computer meaning is different, but car computer are NOT that, lol, way far from it.

So the code a computer choses to use must be looked at to include the codes it DID NOT chose.

Look here: OBD-II Trouble Codes : The Ranger Station

We have:
P0340 Camshaft Position Sensor Circuit Malfunction
P0341 Camshaft Position Sensor Circuit Range/Performance
P0342 Camshaft Position Sensor Circuit Low Input
P0343 Camshaft Position Sensor Circuit High Input
P0344 Camshaft Position Sensor Circuit Intermittent

Computer did NOT chose, working but out of range, working but low, working but high, working but intermittent, all these mean computer is getting something from the cam sensor, just not what it thinks it should be getting
It choose not connected so not working, 0340 no circuit
This is a wiring issue or the sensor is completely dead no connection inside

So always look at related codes, these 'computers' are not smart, but they are logical

And no cam sensor signal will make a 3.0l run poorly

1999 3.0l should be using the 2-wire VR Cam sensor, same as 2004
If it is a 3-wire(hall effect) sensor it will not work with 2004 computer

 

So do u think I have to swap entire intake or since I have already got it started you think it would be alright to use it? And the cam pos sensor is bolted on top cam sycronizer which is how the engine knows to add or subtract fuel, idle adjustment for cold and warm settings and **** like that so I think it can cause it to run Poorly don't ya think? Plus the cam sycronizer has a gear on it that turns oil pump shaft and when the sycronizer goes the engine no longer pumps oil and that's how the original 2004 3.0l blew up. My dumb brother wasentt watching temp Gage's lol Plus I read these ford rangers are famous for the cam syronizer going bad and only way to tell is when engine light comes on, napa has one and the tool for it in alil kit for $62.99 so I'll probably just buy a new one to be on the safe side. Thanks so much for all the help, it's all really appreciated!