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  1. Troubleshooting
    recently just swapped motors due to old motor not being any good it was a ej251 I have a 2.0 block on 2.5 heads its throwing a misfire on cylinder 3 I swapped plugs plug wires made sure the plug pack was good didn't check 02 sensor yet I doubt that would be what the issue was I checked pcv valve...
  2. Troubleshooting
    I’ve been getting a CEL every once in a while for cylinder 2 misfire (P0302), but it sure doesn’t feel like anything is wrong. I don’t mind clearing the code when it comes on, but still want to get to the bottom of it. My mechanic looked into it extensively and could not find the root of the...
  3. Troubleshooting
    I've been having a misfire in cylinder 1 (Code: P0301) for a bit now and have tried fixing it but still it persists. Here's what I've replaced so far fixing other problems I was having: Spark plugs Spark plug wires Ignition coil pack Fuel injectors Fuel pump Fuel filter Redid idle learning...
  4. Troubleshooting
    Hey everyone, my 2.5 just went from an AT to MT, and I changed the computers, to match the transmission with fuel mapping and whatnot. Basically I've changed spark plugs and coil pack. Idle is horrible. Throws misfire CEL with misfires for all 4 cylinders. Engine codes come up as "P0301 (pd)"...
  5. Troubleshooting
    Hi! i’m new here and i’m new to subies. I baught a 2005 2.5rs about 2 weeks ago. everything was fine with it until the other day. everything was fine with the car, nothing was running wrong or giving any indications of a problem but when i tried to fire it up after a quick drive, the car...
  6. Troubleshooting
    Hello guys, been following several people on here as I was swapping my 2001 Impreza 2.5rs. the swap was with a 2003 WRX harness merge and engine. I followed braydon's swap guide on the harness merge as reference. I'm having two issues. -no check engine light illumination when there is a...
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