hi , everyone
mt 26 efi walker ch735 s -spec 3012 horizontal engine twin
kohler engine in walker mt26 hp efi with bosch 32 pin ecu , unit runs hot ,takes about 3/4 of and hour under load - has to stop to let cool down a little then can continue- cycle repeats oil temp light comes on and sometimes head temp as well ----stats on engine fuel pressure 39 psi, leak down test front cyl 12 % leak and rear cyl 20 % leak ,both in the green acceptable range, , oil pressure 48-50 psi revving, cyl head gaskets dont appear to be blown ( as from leak test result), o2 sensor seems to be going from open loop to closed loop at correct temp and providing feed back control, no exhaust leaks , oil temp sensor was working as seen from kohler efi diagnostic computer screen , intake manifold gaskets were ok, , both cyls firing correctly - timming point at idle 10 degrees and revving is 34 degrees advance-plugs correct heat range - customer had replaced efi ( metal can fuel filter) and noted quite a bit of crappy / brown fuel came out - is it possible that blocked - restricted injector filters are causing lean fuel problem,? even though fuel pressure is @ correct operating pressure , and efi unit is trying to compensate by lengthening pulse with ? or am i missing something by the way temp unit got to was 103 Degree C according to diagnostic ,and had a set a code 42 oil temp code , think normal temp about 80 -86 degrees C? correct me if wrong unit did have a ht lead cap insulation breakdown- causing it to run on 1 cyl replaced it it ran better but still hot
can someone give me any other ideas on this one
pauly50
mt 26 efi walker ch735 s -spec 3012 horizontal engine twin
kohler engine in walker mt26 hp efi with bosch 32 pin ecu , unit runs hot ,takes about 3/4 of and hour under load - has to stop to let cool down a little then can continue- cycle repeats oil temp light comes on and sometimes head temp as well ----stats on engine fuel pressure 39 psi, leak down test front cyl 12 % leak and rear cyl 20 % leak ,both in the green acceptable range, , oil pressure 48-50 psi revving, cyl head gaskets dont appear to be blown ( as from leak test result), o2 sensor seems to be going from open loop to closed loop at correct temp and providing feed back control, no exhaust leaks , oil temp sensor was working as seen from kohler efi diagnostic computer screen , intake manifold gaskets were ok, , both cyls firing correctly - timming point at idle 10 degrees and revving is 34 degrees advance-plugs correct heat range - customer had replaced efi ( metal can fuel filter) and noted quite a bit of crappy / brown fuel came out - is it possible that blocked - restricted injector filters are causing lean fuel problem,? even though fuel pressure is @ correct operating pressure , and efi unit is trying to compensate by lengthening pulse with ? or am i missing something by the way temp unit got to was 103 Degree C according to diagnostic ,and had a set a code 42 oil temp code , think normal temp about 80 -86 degrees C? correct me if wrong unit did have a ht lead cap insulation breakdown- causing it to run on 1 cyl replaced it it ran better but still hot
can someone give me any other ideas on this one
pauly50
