EFI flooding

[Frundsberg]

After a Wires Plus install I am having a seemingly unrelated problem of EFI flooding when gassing up. On the days I ride and don't gas up, no problem. On the days I gas up, I go to start it ('08 K9)and she cranks good and strong(Braille battery) but won't kick in. A strong smell of gas ensues and the only way to restart is to let her sit for 30 min. and then she fires right up. Twisting the throttle full open does not seem to clear the gas. Only that 30 min. rest seems to do it. I looked around on the site and didn't see any forum talk about this. Any ideas?
Frundsberg

 

[pknowles]

I had a similar problem on my 08 efi Bulldog if I use the run button after turning on the key. With the wire plus install all You have to do is turn the key on and you should hear the fuel pump charging the system, if so, then hit the start button and it should start up. always use the off button to kill the bike then turn the key off. You shouldn't ever have to twist the throttle to start the efi bikes, as I said berfore, just turn the key on and hit the start button. On mine when you hit run after turning the key on, it will charge the system again. Also check where the fuel line from the tank goes into the motor and see if you have any gas leaking by.Unlike the carburated bike this system operates under pressure. Not meaning to ramble, hope this helps.

 

[Frundsberg]

I have used both the off switch and the key-off methods to shut the bike off. I will be running some errands on the bike this week and I will remember to use just the off switch and see if that does it. Thanks pknowles.
Frundsberg

 

[pknowles]

don't twist the throttle and as soon as th pump stops running, hit the start button and enjoy the ride, good luck

 

[BigDogBro1]

Pat......question, I have an EFI Wolf (EHC) that "occasionally" will not start after hitting the start, it just turns over very quickly. I do not touch the throttle....the pump pressurizes the system and shuts off, hit the start button and the only way it will start is to open the throttle a little, after it starts black smoke when opening the throttle. There are not codes in the ECU. I replaced the Idle control motor several months ago because it would not idle unless the throttle was open just a little. This would not happen all the time and most times it starts right up and idles perfectly.

Any suggestions on what's next...again most times it starts right up and idles perfect. I've checked all connections at the ECU, all are tight. Any ideas......?

Disconnect the + battery wires and let sit for 5-10 minutes then reconnect all the wires again. Install the MAIN largest cable first then the smaller wires. Turn on the key and press the RUN button then TURN OFF the key an let sit for no less than 2 minutes.

This is the EFI reset proceedure or close to it as read from the LABEL under the seat. This needs to be done to reset TPS and other EFI sensors.

If not done the engine may not properly idle or have other problems.

As an added note: When you press the RUN button the fuel pump will run and charge the fuel rail to around 60psi (its pressure regulator) and then shut OFF. The reason the fuel pump shuts OFF is NOT because it reached its 60psi pressure. It's because the EHC or ECM (don't recall without the EFI wiring diagram) only runs the fuel pump for a few seconds and shuts it OFF along with other EFI and coil power via a control relay. When you press the START button this relay kicks in AGAIN and sends 12v power to EFI stuff, pump and coil for as long as the engine is told to RUN. Meaning, the fuel pump runs continuously while the engine is running.

When you press the OFF button the relay opens (de-energizes) and the engine is killed.

 

[pknowles]

thanks for adding that Rob, I had forgot a bout this procedure.

 

[BigDogBro1]

Thanks.....I have done the reset procedures as indicated under the seat many times over the last several weeks but have not waited 5-10 minutes before reconnecting the battery. Also, I always disconnect and reconnect only the negative cable to prevent sparks when reconnecting. Is the waiting period of 5-10 minutes critical to resetting the sensors or will waitiing 15 seconds as indicated on the label suffice?

Dumb question but does it really matter which cable is disconnected and reconnected?

I would wait 5 minutes before reconnecting the battery. The reason is the ECM may need time to totally discharge the circuitry inside (just a personal preferrence). The re-connect of no sooner than 15 seconds is the most important. You know that when you disconnect the constant power feed to the ECM you will loose your ECM learned adaptive mapping data. This is not a big problem as it will relearn it again within a few hundred miles or less depending on the environment variations.

Either + or - cable is fine.

If you are running a Wire+ unit install, check that the ECM is getting constant battery power and switched RELAY controlled power. Get a BDM wire diagram and check it out. On the first EFI Wire+ instructions it failed to document running constant fused 5A or so 12v power to the ECM.

Do your Service engine and Low fuel LEDs work properly? Does your Low fuel LED ever come ON?