28hp EFI code

Discussion in 'Mechanic and Repair' started by cward76, Apr 6, 2006.

  1. cward76

    cward76 LawnSite Member
    Messages: 63

    Check engine light comes on and engine starts runing rough right before it dies.This has happened twice on two consecutive days after I have mowed a hour or so. Both times the engine was idealing because I was off the mower. First in started and ran rough for a second and then leveled out, but the second time was a different story. It would not start, so I check the code and it gave me a 31. I let the engine cool for around 15-20 minutes and tried it again. It started rough and cleared up quickly. Finished mowing with no problems. Any ideas on what may be going on. Engine is new.
  2. Jman

    Jman LawnSite Member
    Messages: 217

    Code 31 is a fuel related trouble code. It may be runing too rich or too lean. To me it sounds lean. I would check fuel pressure while the engine is running under mowing conditions. The fuel pressure should be running 39 p.s.i +/- 1 p.s.i. If it falls low enough the engine can die. What type of equipment is it on??
  3. fixer67

    fixer67 LawnSite Silver Member
    Messages: 2,098

    This is for a Kohler ECU code 31

    Kohler Code 31.JPG

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