1 My mojo don't go Thu Oct 13, 2022 2:21 pm
Bluebeemer
active member
A classic tale, "it ran when I parked it!" That was last spring; it endured the summer heat, 100 deg Fahrenheit at times, evaporated almost an entire tank of gas. Now it starts and idles but will not take any throttle, it just dies when I try.
I'm not very familiar with fuel injection, I can tune a set of webers within an inch of their lives, but what the hell is fuel injection.? I did have a euro spec BMW car, 635 which had in fact the same version injection as my bike, ran like a top. I do have some manuals to help me. Anyway, prelim inspection suggests the fuel pump is not pumping adequately. Ignition on, voltage at the fuel pump plugin, four wires: two show 10.3 volts, one, maybe .1 volt and one no voltage. The pump is new. First step I'm taking is to check all the electrical connections related to running, clean and lube. As a new owner, it gives me a chance to see how everything is put together hands on, as it were.
I've just about finished step one. I just removed the injection unit to clean and dielectric grease the contacts, put it all together. Next I plan to get into the tank and check out in there, in particular fuel filter and pump connections. If it all checks out, reinstall the tank and give it a test. If still not right, check fuel injection pressure at the fuel rail and furthermore test injectors.
I am open to any and all suggestions about what may be wrong. I remember reading a post some months ago about the fact that the K motor will run without a functioning fuel pump using just gravity feed from the tank; is that what's going on in my case?
I'm not very familiar with fuel injection, I can tune a set of webers within an inch of their lives, but what the hell is fuel injection.? I did have a euro spec BMW car, 635 which had in fact the same version injection as my bike, ran like a top. I do have some manuals to help me. Anyway, prelim inspection suggests the fuel pump is not pumping adequately. Ignition on, voltage at the fuel pump plugin, four wires: two show 10.3 volts, one, maybe .1 volt and one no voltage. The pump is new. First step I'm taking is to check all the electrical connections related to running, clean and lube. As a new owner, it gives me a chance to see how everything is put together hands on, as it were.
I've just about finished step one. I just removed the injection unit to clean and dielectric grease the contacts, put it all together. Next I plan to get into the tank and check out in there, in particular fuel filter and pump connections. If it all checks out, reinstall the tank and give it a test. If still not right, check fuel injection pressure at the fuel rail and furthermore test injectors.
I am open to any and all suggestions about what may be wrong. I remember reading a post some months ago about the fact that the K motor will run without a functioning fuel pump using just gravity feed from the tank; is that what's going on in my case?