05 OBW Ej2.0 Engine Swap Now Check Engine Light

[steve56]

On 2005 OBW, swapped in a Jdm ej2.0 engne and used the original 2005 OBW ej25  intake. Get check engine light with p0340 dtc for (camshaft positionin sensor a circuit bank one).When I erase  the code with car running it will immediatel shut off, then stumble for a minute on restart,then run apparently smoothly with the same p0340 check engine light comming back on. The Actron meters Freq Reported Fixes are: 1) Replace the crankshaft positioning sensor reluctor and 2) Replace timing belt tensioner.

 

I did have to splice in the camshaft positioning sensor connector from the 2005 OBW because the JDMs cps connector was crushed. It was a two wire connector so I dont think it matters wich wire on the connector goes to which wire on the wiring harness.

 

Looking for trouble shooting steps to get the p0340 dtc resolved.

Edited September 17, 2016 by steve56

[AdventureSubaru]

Swap the crank sprocket and drivers side cam pulley from the original motor over to the JDM. USDM have different teeth on the back side than JDM. It's sending incorrect signals to your USDM computer. Swap those and everything should be good to go.

[steve56]

Swap the crank sprocket and drivers side cam pulley from the original motor over to the JDM. USDM have different teeth on the back side than JDM. It's sending incorrect signals to your USDM computer. Swap those and everything should be good to go.

Thanks, Appreciate your insight. This was my first Jdm swap. Ive done other Subaru engine swaps where the crank and drivers cam pulley needed to be swapped. Should have taken more time and compaired the two engines pulleys.Slow down to work fast. Didn't do it one this one.

[Buckstopper]

Did all or most of the other sensors match up from the old harness / Intake to the new EJ20 JDM motor?  I am right in the middle of the very same thing you did and having a little trouble with the sensors matching the old Wiring harness.  Also having to swap the oil pan to the old one so the exhaust will bolt up.

 

 

2006 Outback  EJ25 no turbo to a 02-05 EJ20 no turbo.

[steve56]

Did all or most of the other sensors match up from the old harness / Intake to the new EJ20 JDM motor?  I am right in the middle of the very same thing you did and having a little trouble with the sensors matching the old Wiring harness.  Also having to swap the oil pan to the old one so the exhaust will bolt up.

 

 

2006 Outback  EJ25 no turbo to a 02-05 EJ20 no turbo.

Yes as Adventure Subaru suggested it was the crank pulley. I had already swapped in the drivers side cam pulley from the Ej25, but got in a hurry and forgot to check to see if the crank sprockets were the same.I believe the 2006 ej25 has variable valve timing, so that would be programed into your ecm. If your ej20 doesn't have variable valve timing your going to have a compatability problem. The 2005 jdm ej 20 was a direct swap into my 2005 OBW. You always need to use your original intake with its wiring harness.

Edited September 28, 2016 by steve56

[Buckstopper]

So I guess it goes without say that I will have to swap the actual sensors to all three pulleys as well.  Yes the EJ 20 I have does not have the variable oil valve.  I was told to leave those unplugged and have them flashed out of the ECM.  Are there any other hurdles you can think of that we should swap before getting the intake bolted back to the block, ie sensors, water lines, etc.?

 

Items I have swapped already include.

 

Flex plate

oil pan

a couple of sensors that did not match the old harness (knock being one i think) 

intake of course

soon to be all three crank, and two cam pulleys along with their respective sensors.

 

Thanks you so much for any help on this.  I need to get it completed.

[steve56]

So I guess it goes without say that I will have to swap the actual sensors to all three pulleys as well.  Yes the EJ 20 I have does not have the variable oil valve.  I was told to leave those unplugged and have them flashed out of the ECM.  Are there any other hurdles you can think of that we should swap before getting the intake bolted back to the block, ie sensors, water lines, etc.?

 

Items I have swapped already include.

 

Flex plate

oil pan

a couple of sensors that did not match the old harness (knock being one i think) 

intake of course

soon to be all three crank, and two cam pulleys along with their respective sensors.

 

Thanks you so much for any help on this.  I need to get it completed.

All I can speak to is my ej25 to ej20 swap on the 2005 OBW. That was my first jdm 2.0 swap. The company that sold me the jdm ej20 has been importing jdm engines for many years and knows what is a direct swap and what is more trouble. I recall them saying one of the reasons an 2006 jdm 2.0 wouldn't work for me was because it had variable valve timing and my 05 OBWs ej25 didnt. They didnt go any further in explaining the differences like oil pan size,knock sensor ect. I have seen other disscusions that say if you swap in jdm 2.0 engine with variablle valve timing into a Subaru that doesn't have it you would also have to swap the heads.

To know for sure whats going on, Google Foreign Engines Inc. in Lynwood Wa. and give them a call. They can tell you exactly about the compatability of the jdm engine you are installing.

[steve56]

Heres a Wikipedia  article on Subarus variable valve timing system.

 

Active valve control system

From Wikipedia, the free encyclopedia

 

 

The active valve control system (AVCS) is an automobile variable valve timing technology used by Subaru. It varies the timing of the intake valves by using hydraulic oil pressure to rotate the camshaft in order to provide optimal air flow in and out of the engine. The system is closed loop using camshaft sensors, crankshaft sensors, air flow meter, throttle position as well as oxygen sensors and/or Air-Fuel ratio sensors in order to calculate engine load. The ECU is programmed to operate control valves that adjust the delivery of the hydraulic pressure in order to move the camshaft into the position that will provide the engine with the best performance while minding emissions standards.

AVCS is used on the Version 7 and up EJ207 engines, the EJ255 and EJ257, the second generation EZ30D (2005+ in the USA Market) found in the Legacy Outback, Legacy 3.0R and the B9 Tribeca. A Dual AVCS system utilizes both the intake and exhaust camshafts on the EZ36 found in the 2008 Tribeca and on the 2008+ STi EJ257 (W25 heads). Dual AVCS is present on the new FA20 engines in the 2015+ WRX and BRZ, though they actuate with a different method than those of the older engines. Dual AVCS is also found on Japanese Spec engines, although a complete list of the engines with Dual AVCS has yet to be compiled.

AVCS[edit]

The implementation of AVCS is quite different from AVLS. The latter just changes which cam is operating one of the two valves.

In AVCS, the engine computer (ECU) can command a solenoid which advances or retards the camshaft rotation by up to 35 degrees.

By retarding the cams at idle or very low engine loads, you achieve a smoother, easier idle. From idle through medium engine loads, AVCS advances the intake valves to begin opening during the last part of the exhaust stroke, when the exhaust valves are still slightly open. Some of the pressure created during the exhaust stroke flows into the intake manifold, having the effect of exhaust gas recirculation (EGR). The intake valves also close earlier during the intake stroke. This helps with engine efficiency and fuel economy.

At very high engine loads, AVCS advances the intake valves further to open even sooner during the exhaust stroke. This produces a scavenging effect – that is, intake airflow helps clear the cylinder of exhaust gas. It also closes the intake valves sooner on the compression stroke. This results in improved volumetric efficiency and helps to generate higher power output