Wildguzzi.com
General Category => General Discussion => Topic started by: injundave on December 11, 2023, 02:51:19 PM
-
My daughter has a 2007 Nevada Classic 750 ie. One afternoon last week she went to start it after work and it would not turn over and no click from the start relay.
I brought it home on a trailer and spent a lot of time trying to get it to go. Finally and for no apparent reason it fired up BUT it will only run for as few seconds before stopping again.
To get it to start again I have to recycle the fuel pump. I put a new fuel pump in, thinking that may have been the problem but still no change. I have cleaned and lubed every connector I can find but it still won't run. I have also connected GuzziDiag but it says there are no faults. I have also replaced the spark plugs.
Any suggestions. Thanks.
Dave
-
Injun,
So as it is now, will the engine turn over at all, or not even that?
If it won't turn over, do you hear any clicking, when trying to start?
Joe
-
It's old. replace all of the relays and flush the ignition switch out.
-
As it is now the engine will turn over and there is clicking from the starter relay. I have flushed out the ignition switch with WD40.
I have it in mind to clean the injector nozzles also.
-
Is the cam position sensor ok? KiwiRoy posted a great idea regarding this- put an LED across the lead that energizes the coils (he suggested at the fuse). If it doesn't light up when you crank the starter, it could be the sensor. Put another LED across the source for the fuel pump. It will energize for ~3 sec then turn off after you switch the key on. Then it will remain energized when the motor cranks over and starts.
-
Let's start with basics.
- Kill switch. Note that if “off” the engine will turn, but without spark.
- Fuel – Crank engine, remove the spark plugs and smell for gasoline. After cranking, the plugs should smell of fuel and be wet with it. There have been fuel line/filter issues, especially Nevadas.
- Spark – Remove a plug but keep ignition wire attached, ground to engine, and start. If no spark, then the ignition circuit is the issue. Note that attempting to start without grounding the plug is harmful to a modern machine with electronic ignition.
Also, has the bike fallen over recently? That can cause other issues.
Joe
-
As it is now the engine will turn over and there is clicking from the starter relay. I have flushed out the ignition switch with WD40.
I have it in mind to clean the injector nozzles also.
when you turn the ignition switch on, can you hear the fuel pump running until it builds up pressure and then stopping?
-
Thank you all for your replies.
Kill switch is definitely in the "On" position.
As the engine will start albeit only for a few seconds, there must be spark and fuel. I have replaced the fuel pump and filters.
I have checked the wiring diagram and can find no reference to a cam position sensor. Is it known by any other name?
The only thing I have not done is clean the injector nozzles.
GuzziDiag is not helping.
Dave
-
Dave,
So it starts for a few seconds, but then quits. After it stops, can you do the spark and fuel tests again.
Remove a plug, keep wire attached, lay it on the engine to get grounded, and crank, looking for a spark. They also make in-line spark checkers ($5 Harbor Freight) that it this check much easier. If no spark, there's the problem.
If there's spark, then check fuel. The plug prob already smells of fuel from the prior start, but try: When in a no-start condition, give the air cleaner a healthy shot of engine starting spray. It the engine starts after that, then the issue is fuel supply .
Keep me posted please,
Joe
-
SOLVED!!!
Thanks for all your help. Yesterday the problem was solved, confirmed by a ride this morning.
Initially, when the motor would not turn over, I disconnected all the relays, cleaned and lubed the contacts and replaced them in their original positions. There was one that rattled when I moved it. I didn't know what it was but gave it the same treatment as the others.
I then discovered that it was a "Bank Angle Sensor" which is a mechanical device designed to cut the motor if the bike is dropped onto it's side. It is also designed to work only when it is installed the right way up. I think I may have inadvertently installed it upside down so that it would mostly prevent starting or, if it did start, a few seconds of vibration was enough to cut the motor.
As soon as I disconnected it, everything worked fine.
Do I feel stupid? Absolutely. Having said that I have learned something and did some important maintenance.
Thanks again for your interest and help.
Dave
-
I wouldn't feel bad we all have done something like that. I could tell the story of an afternoon wasted trying to get a Mercury outboard magneto to work due to pure stupidity on my part.
kk
-
Did you determine the original reason
-
The original reason must have been dirty contacts on the relay for the starting circuit.