348 - Misfire question. Exhaust 5-8 flows steady. 1-4 has some chop. | FerrariChat
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348 Misfire question. Exhaust 5-8 flows steady. 1-4 has some chop.

Discussion in '348/355' started by FloridaIsland348, Oct 3, 2022.

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  1. FloridaIsland348

    FloridaIsland348 Karting

    Aug 5, 2022
    118
    Pensacola Beach
    Full Name:
    Scott Wheatley
    #1 FloridaIsland348, Oct 3, 2022
    I just switched my spark plugs and took the 348 for a nice fast ride. Sounds great, and smooth at high rpm, but when I walked behind the car while idling I could feel a difference in the exhaust flow. 1-4 had some chop to the gasses while 5-8 had a very steady flow. Is this evidence of a misfire?

    Any pointers on how to track down the issue?
    Pull the plugs?
    Check for spark at the coil?

    Thanks


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  2. Ferrarium

    Ferrarium F1 Veteran
    Sponsor Rossa Subscribed

    Jul 28, 2018
    5,728
    Central NJ
    Full Name:
    Eric
    #2 Ferrarium, Oct 3, 2022
    Wait.. doesn't both header banks flow into one shared can? Not sure exhaust tips on either side are from that sides exhaust exclusively.
     
    FloridaIsland348 likes this.
  3. RoadRacer414

    RoadRacer414 Rookie

    Dec 27, 2013
    2
    #3 RoadRacer414, Oct 3, 2022
    Replace spark plug cables and plugs. Specialy the plugs on the spark plug side.
    I made mines, since the OEM are way too expensive.
    Also, I have a problem with 2 fuel inyectors on idle. Had to take all of them to a fuel inyector cleaner shop. After that the car runs much better, and at Idle it is really nice. Smooth.
     
    FloridaIsland348 likes this.
  4. FloridaIsland348

    FloridaIsland348 Karting

    Aug 5, 2022
    118
    Pensacola Beach
    Full Name:
    Scott Wheatley
    #4 FloridaIsland348, Oct 3, 2022
    You are right. They mix at the muffler. Maybe it is just evidence of me being an idiot.


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