Recent content by jjreds01

No it was running everything plugged in. Cyl #2 firing light on +&- Cyl #1 not firing light on + only

Ok when I put a 12v test light on the running cylinder #2 it lights up both sides primary+ & -. On the dead cylinder no light on -. Swapping the coils no change. That's why I checked continuity cyl 1 coil - to pin 22. I'm admittedly lost rn.

Thanks I should have mentioned the coil trigger wire is getting zero volts. It's not even trying to make a spark. I'm going to try to probe pin 22 at the ecu connector

No spark on cyl 1. Have power to coil and continuity from pin 22 on the ECU connector to coil connection/trigger wire. ECU is bad? And it's discontinued. Spark was intermittent before it finally died.

Found it. Stupid mistake. Had "I" plugged into "A" on the key switch. Thanks for hanging in there.

My mower has a separate fuel pump relay and I couldn't find a wiring diagram that shows 2 relays. Before I start grounding ECU pins I'd like to understand how those circuits affect the start circuit. Your comment about pump coils and start on the same pin got me thinking thanks

Thanks

24 pin plastic case ECU Anyone have a wiring diagram, the one in the service manual I downloaded is illegible. Particularly interested in the wire color to Pin 3 safety Cross posting see https://www.lawnmowerforum.com/threads/need-a-guru-kohler-26hp-efi.74951/

Yes PTO works with the key switch in the on position. I'll have to see if I can open up the ECU connector to figure out which wire feeds pin 3. The start relay just clicks. I can put a jumper across it and the starter will work with the key switch so switch to relay is good, relay to solenoid is...

That was the first thing I checked. As stated in my OP. All three switches are working. In the run position I've got power to the start relay, fuel pump relay, pin 2 on the ECU switched power. No power to coils. Fuel pump runs on key on for 1-2 sec.

928 ohms @ ECU pin 9 & 10 928 ohms @ 3 pin sensor connector Relay mounted to chassis clicks when turning key to start position. No starter signal, no juice to coils. Starter is ok - works by energizing signal wire.

Thanks I'll check the resistance between pin 9 and 10 on the ECU in the morning and report back

Thank you. Is there a test I can do to check it? There is no power to the coils. Pin 3 safety is open is that permission to start? And pin 10 speed sensor ground - should I see a ground there with ECU unplugged?

Hi all bought a Lazer Z used has some issues I'm trying to figure out. Made a post about it thanks