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2011 FX 450 No Start.

E

EvDaniels

Joined Oct 2019
4 Posts | 0+
Canada
Having issues getting this bike running. Turning over but just pops once in a while.

ive put a V/O meter and tested just about everything.
-injector was taken out sent in cleaned and flow tested

-fuel pump meters out at around 50psi and can also see fuel spray while cranking

-pulser coil reads 102 ohms, and puts out around 2 volts while cranking.

the Throttle body was ultrasonic cleaned, and TPS set to 6.01 volts.

the one thing I did notice is that when I checked for spark it would only do so for about 2 seconds. Once you let it sit for 10 seconds it would spark again for another 2 seconds.


I did put a meter on the coil but it seems to be in spec.

Out of options and Im wondering if it could be the EFI.


any ideas would be a huge help



Ev
 
There are 4 different fuel filters check them all. maybe bad crank sensor. Other thing coil wire at spark plug cap try cutting off an 1/8” of wire putting spark plug back on. just guessing
 
i did take it all apart, cleaned it with contact cleaner, cut about half an inch off the lead and tested it. its says its a 5k but it was more like 6 k ohms. As far as filters I've changed most and like i said i can see the injector firing a decent cone.

Cheers
EV
 
Last edited:
I tried everything when I had a phantom dying issue with my 2010FX450...it would die, then re-fire on its own a second or two later. Without bump-starting or hitting the magic button...none of which was good in the middle of a race!

I sold the bike to a co-worker (full disclosure) who put a dual-sport kit on it. Seems that running new/additional grounds may have solved the mystery?

Check your ground wires. I was going to replace the main one from the battery, but ended up selling the bike before I did, so I'll never know for sure.

FWIW...I had the bike put on a factory scanner immediately after it had done it little dying/restart act and NOTHING was stored in the ECU. This lead me to believe it was not an FI problem.
 
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Not sure if you made a typo on your TPS setting, but the spec is .61 vdc. If in fact it’s set to 6+ volts, it’s definitely not going to start!
 
Sorry my error, it was set to .601 or as close to it as I could.

The popping started to bug me so I put a camera down the intake side and seen some corrosion on one intake valve. This lead to Pulling the head off, as I pulled the jug out the compression ring fell into my hands in two pieces.. I’m assuming a broken ring and corroded valve would be the culprit but stranger things have happened in the past.

As of now the head and jug are at the machine shop and I have a Vertex piston kit on the way.

I’ll Keep informing on the progress.
 
Thanks for the info, I’ll have time to do some wiring now it’ll be down for a bit.
Also what dual sport kit did your coworker use, I intend to do the same.

Cheers
 
Funny enough, he pulled the lights/indicators, etc. off a beat down scooter and made them work. DOT and basically free.
 
My 450 FX does not get used much I start it let it run to just keep the fuel moving through the system . Doing this may have wrecked the spark plug

- cleaned the injector same stalling problem
- swapped the spark plug cap nothing
- I was going to change the fuel pump but had an old spark plug from KTM 530 non iridium but it was the same model

that solved the problem it was a bad spark plug

it would start run for 40 seconds make a slight stumble then stall out shortly after . If the throttle was applied slowly it would rev up , but if it was opened from idle like normal riding it would stall and backfire
 
Update the spark plug was not the fix it started doing the same thing since the spark plug seemed to fix it I checked the coil wire. What I noticed was the sheeting covering the wire had a split and looked like it was being pinched by the fan kit and the frame . The sheathing is an additional piece not part of the spark plug wire. I slipped some heat shrink tube over it and rerouted the coil wire up higher then down to the plug. It seems to be working
 
Update I swapped the spark plug cap with a used one checked it get sporadic ohm Reading but not an open circuit the flameout problem returned and was progressively worse as the bike heated up . The new plug cap came in it it reads 4.8k ohms so far the bike runs great . After probing the spark plug cap I realized the part that the coil wire threads onto was slightly loose and would sometimes read correctly . It’s a cheap part to change
 

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