92 K75S Fuel injectors are wide open...
I hope someone has seen this problem before and can help.
The bike was not running. Fuel coming from the exhaust. I pulled the fuel rail and the injectors are flowing wide open continuously when the start button is pressed and until the fuel pressure stops. I've seen these injectors working before so I do know that these are running continuously not just looking like they are. Massive fuel coming out of all injectors.
Injectors were sent in and cleaned and tested. Injectors are good. Computer, Air Flow sensor, Temp sensor and fuel pressure regulator replaced. Problem still persists.:banghead
I disconnected one plug from one fuel injector and that one is not squirting. So the injectors are getting a solid power signal... Kill switch shuts them off instantly. Also disconnected the TPS with no effect.
Could it be a short in the fuel injectors wiring harness .? Or the fuel filter is causing a back pressure?
Please help if you can,
L-Jetronic box was BAD (both of them)
Just doing a long overdue followup here....
I have been spending much more time out of town working lately then fixing bikes.
Everyone that told me that it was the L-Jetronic box (computer) was right..!!!
I finally took both of my computers to a friends place and tested them on his running K75 and it turns out both computers that I had were bad.
Got a new computer and it runs....
I think I now have a blown head gasket because # 3 plug is coming out black and oily and the bike won't idle or rev over 6K.
Thank for all the good and correct advise. I had no idea that the replacement computer I bought was bad.
I changed the oil after...
I re-installed the plugs (cleaned and gaped) and the injectors then the computer and after a lot of revolutions it started.
It ran as if only on 2 cylinders. I tried revving the motor and 6K was max.
I shut it down then changed the oil and filter.
It still ran the same. I pulled the plugs. One and two looked good number three was oily and black. I replaced the plugs with another set with the same results.
Compression test came next with all 3 cylinders equal.
I then bought a leak down tester and read how to use it on the internet but I couldn't say anything definite about it.
When it runs I should mention that it does smoke a lot also. I bet you want to know the color of the smoke .... I have to say gray with some darker puffs here and there.
Thanks very much for your continued input. I really don't want to pull the head and find it wasn't necessary.