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250 Error Codes P0313 PO302 Car sounds rough

Discussion in 'Mechanical - Engine, Gearbox, Exhaust etc' started by Scott Lewis Chambers, Jan 30, 2022.

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  1. Jan 30, 2022 #1
    Scott Lewis Chambers

    Scott Lewis Chambers

    On my way home from picking up some bits from screwfix the road was clear and thought id give her a little go, I didnt hear a backfire but she started sounding like ass, Almost like it struggles to accelerate like a cylinder isn't working or something.

    I did a quick scan on my OB and i got two errors.

    PO313 (misfire with low fuel) and PO302 (cylinder 2 misfire detected).
    I have a quarter of a tank so i wouldn't say im super low on fuel and i always use super or w/e

    Is it just injectors or sparkies? Or am i looking at a ballsed cylinder?
     
  3. Jan 30, 2022 #2
    dave77

    dave77

    Could be a spark plug, a coil pack, or an injector, do a compression test also for peace of mind. Does the fuel pump sound strong when it's priming?

    Sent from my CPH2025 using Tapatalk
     
    Scott Lewis Chambers likes this.
  4. Jan 30, 2022 #3
    Scott Lewis Chambers

    Scott Lewis Chambers

    i think so yeh. Okay It needs a full sparks swap tbh. Just a pain in the backside. Might swap out the coil pack and sparks at same time then if it still sounds rough I’ll get new injectors
     
  5. Jan 31, 2022 #4
    ryan197

    ryan197

    If its rough on idle, unplug one thing at a time and see if it get worse or not, if not on one of the items, it will be that or that cylinder.
     
  6. Feb 16, 2022 #5
    Matthewdemin

    Matthewdemin

    I have the same problem
    Idle not stable and p0313 and p0301 but misfires at 1cylinder
    I have new plugs and coils
    I check fuel pressure is fine.
     

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