Good morning,

  I am doing an engine swap. I need to know what sensors are required to make in run reliably. I picked up an engine and it has most of the wiring harness still attatched. I a plan to get an ecu but not sure if any particular year is better then other. Then i will find the wiring pin out for that computer and start making my harness. I just want to say thank you for the help in advance. 

What year is the engine?

And for curiosities sake, what are you planning to put it in?

All of them.

 

GD

The engine is an early 90s legacy engine.   Building a vw baja beetle.    

Good morning,

  I am doing an engine swap. I need to know what sensors are required to make in run reliably. I picked up an engine and it has most of the wiring harness still attatched. I a plan to get an ecu but not sure if any particular year is better then other. Then i will find the wiring pin out for that computer and start making my harness. I just want to say thank you for the help in advance. 

don't make a harness.

 

Strip one down complete from a compatible car.

 

Do you have the intake?  how many large connectors to the body harness does it have?

 

If you don't have an intake get one.  Preferaby from complete harness donor car to make sure the connectors match.  Legacy 90,91 is 3 connector, 92-94 is 2 connector.  Or you could run it with any Impreza 2.2 or 95-98 OBD-ii 2.2 or 2.5 computer from Outback or legacy or even 98 Forrester.  You just have to get a matching OBD II 2.2 intake.

 

But for the love of god......search.....there is so much info on harness prep and what works for what.

I have the intire engine minus a coil.  The harnes is mostly there but has been cut. That is why I was thinking i would have to build from the computer I get to the sensors that are essential to make it run.  

As I said - all of them. You can't tune those ECU's so for it to work correctly you will have to hookup everything.

 

As said - get a complete harness and strip it. You can't build one because you can't buy the connectors to do so.

 

GD

ASSuming "early '90s" is 1990-1994

 

and ASSuming you are planning to use the stock ECU

 

and ASSuming you have all the connectors

 

 

GD is pretty much right, those engines don't have much that they don't use. There's a couple emissions solenoids that wouldn't effect the way it runs, but would throw a check engine light. But it's so easy to just hook them up, just do it right. Everything is mounted to the engine except the MAF and ignitor.

You still need alotnof other stuff if all you have is an engine and a cut up harness.

 

Really need to know exactly what year the engine is. 90-91 used different idle control and injectors and they don't interchange and don't work with 92+ ecu.

 

Easiest thing is always to start with a whole dash /engine /ecu harness and cut out what isn't needed for the swap. Much much harder and more expensive to build a harness from scratch. As said earlier there is tons of info on VW swaps and what works and doesn't and what's needed.