Alright fellas I'm at my wits end here. About 2 months ago I added a Dobeck EFI unit to my 2000 Nomad 1500. It ran great for about a month, then it seemed that my gas mileage just dropped off hard. I kept running it, it's my primary means of transportation, intending to look into it later. Last week I'm headed down the road, my FI light comes and the bike dies. I get it running but the FI lights stays on and I've got to keep the throttle in just the right spot, to much it dies, to little it dies. Pulled it apart when I got home and saw that on the brown/black wire on my TPS was severed. Got that fixed and checked resistance per sfair's directions in another thread (sfair appears to be the mountain-top guru here). Everything checked out. Buttoned it up and I get the same symptoms. Won't start without choke and throttle, have to maintain the throttle position to keep it running. It was blowing black smoke and when I pulled my plugs, another sfair tip from a thread I found, all four are soaked with fuel. Sorry for the length of the post guys, I'm really hoping someone can lead me in the right direction here.
Removed the processor and tried again. Everything happened the exact same. Won't start without the choke being on and the throttle being cranked. Only ran for about 8 seconds that way, blowing a small amount of black smoke the entire time.
1. Clean, dry and re-install plugs.
2. Pull fast idle knob. You will notice that it is easy at the start but then gets harder, then stops. Pull about 50% into harder area.
3. Do not touch throttle at any time.
4. Try and start.
Alrighty. Cleaned the plugs and put em back. Pulled and pushed the choke around to gauge the area you were referring too. Got the choke pulled to the "sweet spot", keyed it on, hit the ignition and the bike turned over. It sputtered like it was going to fire up but didn't. Tried again and all I get is engine turn over.
Alright. I work deep nights and didn't see that last part until I got off work. I repeated all the steps, pulling and cleaning the plugs, replacing them and then using the choke. After trying to start it again, I pulled the plugs and yes they are once again fuel soaked.
Remove plugs, pull DFI fuse, crank engine over for 15 seconds or so with throttle wide open and watch for fuel or mist spraying out of plug holes. Dobeck must be completely removed, not just the power or fuse pulled.
Dobek is sitting on the work bench presently. I'm having a hard time with the DFI fuse? Found the relay that sits behind the coolant reservoir but I'm not finding a fuse anywhere.
Searching online and in my manual, I can only find the relay. Pulled it and followed your directions. No spray, can smell fuel but nothing coming out of the plugs. With the relay pulled, I did noticed that the bike didn't go through its little "priming" sequence when I keyed it on.
Is it the 15amp fuse just kind of laying alone around the battery? Just for future knowledge. Buttoned it back up and we get the same results. Pulled a plug and it's got fuel on it again. Is it odd that this would just happen out of the blue or has it possibly been a problem for a while and I just didn't notice?
Could it be my EFI unit is going bad? My brother had a similar, not same, problem with his Yamaha and replaced his EFI box...problem solved...at least in his situation.
Your plug wires fit onto a plug with the screw top off.
What I did is break apart an old plug and used the center section to plug into the wire. I then bent it around to fit the cap and plugged the tester into the cap so that contact was made to the old spark plug core.
One could use a similar sized screw to do the same thing as long as the screw was of the correct diameter as the top of the original spark plug.
Make sure I got this. You separated the ceramic portion of the plug, at the nut (basically the portion that is threaded from the portion that is not) inserted it into the wire. Then fit the tester into the make-shift adapter yes?
Yes. The top of the old plug core fit into the spark plug boot and then bent the core to form to the boot. The boot is flexible enough that you can push the tool into the boot to contact the core.
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