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Old 05-13-2020, 01:00 PM   #1
Capn-BrownBeard
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Join Date: May 2017
Location: Chickamauga, Ga
Vehicle:
1996 Outback Impreza
Red and Grey mostly..

Default 2.0 swap runs rough. Help!

I recently did the 2.0 n/a swap on my 03 legacy outback 2.5 auto. Swapped crank gear and sensor, also drivers side cam gear and sensor from the 2.5. Used intake from 2.5 also. I missed the ground for the fuel pump shut off when installing so fuel pump kept running and dumped fuel into the cylinders. Sorted out the ground and got the car to start and run but as it warmed up it progressively ran worse ( rough idle, barely rev, engine shaking slightly) and the cat began to glow red. Shut the car off and left it for about 24 hrs. Went back the next day, started the car and it began blowing thick white smoke with a heavy fuel smell out the exhaust that eventually went away. Still runs terrible, won't rev and will barely move with pedal pressed to the floor. Catalytic converter no longer glowing or getting to hot and NO check engine light.. I'm stumped any help, info, advice would be greatly appreciated.
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Old 05-13-2020, 09:48 PM   #2
SubieHondaGuy
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What 2.0 block did you use?
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Old 05-14-2020, 10:10 AM   #3
Capn-BrownBeard
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Red and Grey mostly..

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Not sure what the exact engine code is, have to look at my invoice later. It was listed as a direct replacement for my 03 2.5. It's a N/A 2.0 with egr. Block code is ej20.
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Old 05-14-2020, 12:12 PM   #4
Capn-BrownBeard
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Checked my invoice jdm engine is a ej202.
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Old 05-19-2020, 02:01 PM   #5
Kostamojen
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1993 FWD Base Impreza

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Might need a rebuild.
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Old 05-22-2020, 11:46 PM   #6
Leonardo
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Did you try unplugging the two engine harness connectors and connecting them again. Had some issues when I did the same swap into my 2.2 and was that.

Check all connections again and with some brake cleaner, check for any leaks.

But yeah, timing sensors are the same as I searched through the books. I'm using the JDM ones now. Only had to swam cam and crank gears and your whole intake with sensors (even though water and knock are the same.)
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Old 05-26-2020, 02:27 AM   #7
Wannabe WRX
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WRB (in Progress)

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Your catalytic converter is clogged.

If you can see that cat glow red at any point, it means that it has melted inside and the exhaust gases cannot pass. However, there is no CEL for this. But all of the symptoms you describe are for a clogged cat.

Clogged cats usually happen with misfires that aren't corrected. That's because fuel that isn't burning properly makes its way down to the cat and melts the material inside. In your case, the fuel that dumped into the cylinders had some pass to the cat - and melted the inside stuff.

[And yes, I've had those symptoms happen.]

Replace your catalytic converter. That's the reason why your car is running bad.
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