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Old 09-10-2019, 12:26 PM   #1
Zombie_Doctor112
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Default Engine swap now car wonít start!

I had to do an engine swap on my 2008 Impreza 2.5i, I got the engine from a 2013 Impreza 2.5, I just put the new engine in and threw everything back together and it cranks over but wonít start. I checked fuel, spark, and thereís no codes coming up. It just keeps cranking over like itís missing something. I donít know much about mapping an ECU but could it be becuase thereís a different engine and the ecu doesnít agree? Any help would be appreciated!
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Old 09-10-2019, 12:47 PM   #2
shagfagon
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...the 2013 impreza never got a 2.5 liter...
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Old 09-10-2019, 12:48 PM   #3
shagfagon
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its a completely different engine than the ej253 that originally came out of your 2008...what did you actually do?
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Old 09-10-2019, 12:49 PM   #4
shagfagon
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unless you dropped a whole ej255 in there?
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Old 09-10-2019, 12:54 PM   #5
Zombie_Doctor112
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itís a rebuilt ej25 Iím not sure what car itís from I thought it said 2013 on it but I suppose that means something else.
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Old 09-10-2019, 01:16 PM   #6
Zombie_Doctor112
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I tried the ecu reset where you disconnect battery and hold the brake pedal but that didnít seem to have any affect. It just keeps cranking with no combustion at all.
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Old 09-10-2019, 03:21 PM   #7
yarrgh
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put the cam and crank pulleys from the original engine on the new one.
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Old 09-10-2019, 05:40 PM   #8
shagfagon
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Yeah dude, we do NOT have enough information at all to help you.

You need to find out what engine you actually put in there. Did you do just the shortblock? The longblock?

We cant begin to help unless we know at least that.
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Old 09-10-2019, 05:42 PM   #9
shagfagon
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How did you verify you are getting fuel? Can you hear the fuel pump prime? Do you have fuel pressure? Did you reverse the lines and put the fuel return on the fuel feed? Did you reverse some of your coil packs?
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Old 09-10-2019, 06:42 PM   #10
Zombie_Doctor112
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I fixed the issue, reversed the ignition wires. However there is a new issue, oil pressure is low after the vehicle warms up. And itís a short block, 9mm oil pump
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