I just swapped a 97 2.2 into a 98 outback 2.5. First time doing this, had a few snags but it runs great. My question regards mil light aka check engine light. So far I don't have one. Used the 2.5 Maf and ecu. Who has gotten mil's? And did they come on immediately? From my knowledge of computer controls an eye or Maf code would come on once the computer goes through it's basic checks.

Am I free and clear?

How many miles since swap?

 

You have a code reader?

 

GD

It can take up to 150 miles and numerous drive cycles to set the CEL. At least that's been my experience.

My question regards mil light aka check engine light. So far I don't have one.

you won't get one.

 

Used the 2.5 Maf and ecu. Who has gotten mil's?

doesn't matter, completely interchangeable so it doesn't matter which MAF or ECU you use.

 

the only CEL will be if you used a non-EGR engine in an EGR equipped vehicle.

 

From my knowledge of computer controls an eye or Maf code would come on once the computer goes through it's basic checks.

nope.

 

Am I free and clear?

yes

There's always a possibility of an evap purge flow code. That pertains to differences in the evap routing and purge flow detection but 97 and 98 should be the same. Though I have seen '97s with front evap cans and a '98 absolutely would have a rear can.....

 

GD

Though I have seen '97s with front evap cans and a '98 absolutely would have a rear can.....

 

GD

 

This can be dealt with by looping the 2 lines that would go to the front can, to each other. (front can manifold in rear can car)

 

A rear can manifold in a front can car???? IDK.....but that doesn't seem to be the common way it worksout. Ussually the other way.

I've done both depending on what I had access to. It's not always as simple as that though. Sometimes the evap purge system has to re-created to match what the ecu wants. There are differences from year to year in how the ecu expects the MAP to react on a purge signal that require different hose routing.

 

GD