Another Falco won't start thread

[wayofthedarkhand]

Rode back from work Tuesday, parked up as normal. The bike was running fine, no issues whatsoever.

Went to start the bike this morning, and it turns over and over with nothing happening.

Last time this Americans beat you guys to it, correctly diagnosing the internal fuel hose. That was sorted.

No idea what it is this time and it's far to cold to stand around investigating.

[D-Rider]

Not giving us much to go on here so really it's down to lucky guesses.

Kill switches, in gear, any other interlocks?
Have you got sparks?
Has someone fitted the standard cans, it has started but you can't hear it running?

[Falcopops]

Go with the fuel and spark check as usual. I'd suspct electrical since you've done the fuel thing, although the filter might blocked or the hose could have come off.

connect a low wattage bulb (5W, or a dash bulb) across the injector connector and see if it tries to glow a bit intermittently (bodge version of a noid light, but it works) to check you're getting pulses to the injectors.

Check connections to the ECU.

Make sure the coils are connected and working all the way to the plug.

[blinkey501]

Can you hear the fuel pump?
Can you smell petrol?

[Aladinsaneuk]

as above

check the sidestand switch, and the nuetral switch

I would also check the tip over..... they can be dislodged very easily......

[wayofthedarkhand]

There is spark. There is fuel in the tank, and the pump primes fine.

The internal fuel hose is connected, so that's all good.

Cranking for about 5 seconds, and it wants to start there a few little pops of combustion and a little exhaust gas, but it never really catches.

Injectors can't freeze or anything like that can they?

[Aladinsaneuk]

It's not flooded is it? Try starting with throttle wide open....

[wayofthedarkhand]

It's not flooded is it? Try starting with throttle wide open....

Looked that way when I took the plug out.

Problem is I can't crank it over enough as in this cold weather the battery (a YTZ14) is only good enough for about 5 solid attempts.

Going to try using my old Lucas battery as a sacrifice then, put the YTZ14s in.

Might short the starter relay too. That should help.

[blinkey501]

It's not flooded is it? Try starting with throttle wide open....

Looked that way when I took the plug out.

Problem is I can't crank it over enough as in this cold weather the battery (a YTZ14) is only good enough for about 5 solid attempts.

Going to try using my old Lucas battery as a sacrifice then, put the YTZ14s in.

Might short the starter relay too. That should help.

Mmmm FFS don't break the sprag clutch dude

[fatboy]

Sounds similar to my non running falco. was stood up for a while, had fuel supply issue,re did earth to pump,ran like a dream then stopped when I went for MOT.. still dead
Check you have voltage to both injector relays,the relays can be tested by wiring them up indipendantly to a power supply (silver terminals) then measure the output with a meter on the other (copper coloured ) terminals,you should get full voltage instantly on the outputside instantly.
A NOID light is best for testing injector pulses, low voltage so difficult to see with standard bulb,maybe use LED tester,cost £5ish
I have Bosch Noid light I will happily lend you, I bought a set of 5 car test lamps for £12 ( Alfa,Ford, Chrysler,Audi ect ect
Also try the quick disconnect on the return fuel line (LHS),with the ignition on and the QD undone fuel should fly out ot that pipe

[wayofthedarkhand]

Wired two batteries in parallel to give me more attempts.

Throttle wide open, cranked it over. There is a good strong crank, I know there is spark, and there is fuel in the tank.

The voltage stayed above 11v whilst cranking (with the batteries in parallel)

It want's to start it just can't quite seem to manage it.

Here is what it sounds like:

https://docs.google.com/open?id=0B0THYk ... VZCTUVKTGc

[blinkey501]

Right the bike has a spark and you can hear the fuel pump running. Can you smell petrol when cranking the bike over?
I would be tempted to remove the fuel pipe at the throttle body end and turn on the ignition and see if the fuel flows freely.
I seem to think that maybe the fuel filter may be blocked and doing the above test would prove this.

[wayofthedarkhand]

Went out to the bike this morning. Opened the throttle cranker it over, and it started first time.

Must have just flooded, and then with the super cold weather we had, didn't have enough cranking time to clear out.

That or it was protesting about being reverted back to stock for the winter.

[D-Rider]

Went out to the bike this morning. Opened the throttle cranker it over, and it started first time.

Must have just flooded, and then with the super cold weather we had, didn't have enough cranking time to clear out.

That or it was protesting about being reverted back to stock for the winter.

..... so didn't you previously try what Pete said about starting with the throttle wide open in case it was flooded as this almost always works?

[wayofthedarkhand]

Went out to the bike this morning. Opened the throttle cranker it over, and it started first time.

Must have just flooded, and then with the super cold weather we had, didn't have enough cranking time to clear out.

That or it was protesting about being reverted back to stock for the winter.

..... so didn't you previously try what Pete said about starting with the throttle wide open in case it was flooded as this almost always works?

Yep was the first thing I tried.

And I tried it for multiple days.

Really the bike shouldn't flood so easily though, never encountered it on anything else.