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power and ground are ground are good. I ended up getting the Kohler diagnostic software and I am seeing that the engine wont stay in closed loop at high rpm. could this be causing the issue? also seeing on the software that when the engine goes into "power enrichment" is when the engine starts...

new map sensor replaced. I ended up getting the Kohler diagnostic software for the live data views. looks like when the engine goes into "power enrichment" in the ecu, the issues start to happen until the throttle is dropped down and "power enrichment" becomes disabled.

the procedure from the manual. 1. Check that the batt ery voltage is above 11 volts. 2. Start with the key switch OFF. 3. Turn the key switch to the ON and OFF, then ON and OFF, then ON, leaving it on in the third sequence. Do not start the engine. The time between sequences must be less than...

There aren't any codes unless I unplug a sensor. At that point, I read the flash codes from cycling the key to get them to flash. After I know those codes aren't causing an issue, I do an ECU reset and a TPS relearn

It will blink codes if I unplug a sensor but there are currently no codes flashing on the MIL or CEL as I was calling it. I changed the broken map sensor with new and still has same issue. I'm not sure what else to do.

Thanks for the info. Iv'e been going through it as well and have done the following: - installed air filter, changed oil and filter to proper level, checked compression, new spark plugs, new coils, reset the governor adjustment, charged and load tested battery, changed fuel, fuel filter, fuel...

Ok the hose is before the butterfly valve so it doesn't see vacuum really. I did find a chewed up oring on the map sensor. Attempted repair with slightly bigger oring and now I have a map sensor on order ?‍♂️

I checked the vent hose and it appeared damp but no fuel running out. I ran the engine with the vent hose removed and it acted exactly the same. Could this indicate there is a vacuum leak somewhere in the vent line to throttle body? I did replace this hose due to it breaking upon disassembly...

Checked all grounds with none looking corroded or loose. O2 wires wiggled while running well and while running poorly with no change in either circumstance. No coolant but it does have an external oil cooler.

Ok so I replaced the O2 sensor and no change, installed the new injectors, no change, coils came in so those as well, no change. Did an ether test to find vacuum leaks with no indication of a leak.

Hello! I just picked up a "new to me" Lazer Z 60" with Kohler EFI engine. This is my first time into the EFI world for mowers so bare with me. It was only running on one cylinder. Found a coil pack arcing at the boot to the block. I put some heat shrink on the boot and it stopped the arcing...