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Misfire. Replace ecu. What do you think?

  • 27-05-2014 1:18am
    #1
    goz83
    Registered Users, Registered Users 2 Posts: 8,035 ✭✭✭


    My friend bought a 2003 mondeo a couple of weeks ago. It had the EML on and engine didn't sound right. I hooked up the md801 diagnostic scan tool and it was reading misfire primary 1 and 2. He changed the leads but problem still existed. Car wouldn't start after a couple of days. A mechanic he knows rang another guy who specialises in ecu reprogramming said a replacement ecu would be needed. Seems a bit suspect. Could the ecu have given false readings to the scan tool? It worked fine on my brothers mondeo that had an EGR code showing, which i cleared and has been fine since, so i think the tool works fine.


Comments

  • #2
    Interslice
    Registered Users, Registered Users 2 Posts: 3,506 ✭✭✭Interslice


    Could be the coil packs or even the spark plugs. I'd try the plugs first and then the coil pack. A new ECU normally is a last resort when you've checked everything else.


  • #3
    goz83
    Registered Users, Registered Users 2 Posts: 8,035 ✭✭✭goz83


    Interslice wrote: »
    Could be the coil packs or even the spark plugs. I'd try the plugs first and then the coil pack. A new ECU normally is a last resort when you've checked everything else.

    Said he changed the coil packs. I asked if he changed the leads and he said he did.


  • #4
    George Dalton
    Registered Users, Registered Users 2 Posts: 5,728 ✭✭✭George Dalton


    A bad coil can fry an ECU. Have seen it a good few times on those Fords.


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