Engine running rich and missing

Discussion in 'Mechanic and Repair' started by lawnguy 2, Feb 5, 2013.

  1. lawnguy 2

    lawnguy 2 LawnSite Member
    Posts: 11

    Hi,

    I have a 2010 Scag Turf Tiger 29 Kawasaki fuel injection with 329 hours. It tends to run rich with a mis. It has new air filters. I checked the fuel line for clogs and all is fine. I also drained the gas and put in some new supper unleaded. Before I run to the Scag dealer and run up a bill I thought it would be a good idea to see if anyone on here has any sugestions?

    Lee
     
  2. Landrus2

    Landrus2 LawnSite Platinum Member
    Posts: 4,812

    I would start by checking fuel pressure:waving:
     
  3. Oldtimer

    Oldtimer LawnSite Bronze Member
    Posts: 1,455

    Run to the Scag dealer.

    Oldtimer
     
  4. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    What do your sparkplugs look like...??? If you replace them...use the correct. NGK plug..
    I had a customer that had a Kaw DFI...we changed the plugs...BPR2ES I think..anyway it would run perfect for 3 hours ..then start fouling plugs ....changed the plugs and it ran good for another 3 hours...again the same thing..
    The problem ended up being the DFI connector was not sealing good and got moisture in the connection..
    I believe there is dilectric grease in the connector ...but moisture finds a way in...
    Check the connection at the black box...
     
  5. Landrus2

    Landrus2 LawnSite Platinum Member
    Posts: 4,812

    I like the new look:waving:
     
  6. lawnguy 2

    lawnguy 2 LawnSite Member
    Posts: 11

    They are very black and when I removed the threads are wet with gas. They are the correct NGK plugs. I talked to the Scag dealer about my problem a couple weeks ago and he mentioned I may have a bad sensor. Where are these and what do they look like?
     
  7. Landrus2

    Landrus2 LawnSite Platinum Member
    Posts: 4,812

    OK replace your oxygen sensor.:waving:
     
  8. Landrus2

    Landrus2 LawnSite Platinum Member
    Posts: 4,812

    Sorry look for it on your exhaust manifold looks like a spark plug with wire on top:waving:
     
  9. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Kawasaki DFI...Digital Fuel Injection...does not have an O2 sensor...
    Spend a little time in the school before you try to be an instructor...
     
  10. lawnguy 2

    lawnguy 2 LawnSite Member
    Posts: 11

    Yes, I looked everywhere on the manifold and couldn't find one. :hammerhead:


     

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