So I had my swingarm break on me and it caused my tail to sit on my tire and rub a whole in my relay box it popped the 30amp fuse and rubbed a hole in some wires I got a new relay box and undertail and repaired the wiring and replaced all the fuses but for some reason my fuel pump is not getting power on the red and white wire if I put power to it from the battery the fuel pumps kicks on its not getting power from the ecu and the new relay box do i need a new ecu or is there something else

Check the other fuse at the 30a fuse relay.
Kill switch off?
What's the code number if no joy at the fuel pump.

And get that swingarm pivot torqued if that is an 06-07 ZX-14. They recalled for that.

So I've never heard of a swing arm breaking before, I thought they were some pretty hefty pieces of well engineered metal. The rear shock mount failing would make more sense to me than the swing arm itself (maybe that's what he was referring to?) as if the arm broke I would imagine the rear tire getting pulled towards the chain and all sorts of bad stuff happening after that...

Hey , Could Someone help me with an issue I'm having. I have a 2012 ZX14r and as I am riding it and I give it gas , it ask like it doesn't want to take it. I have change the plugs , Fuel filter and pump , I also change the oil. I put everything back together and it fixed the problem. when I took the filter off it was trash in it ( grey Matter ) it look like the top of the gas cap. So I started my investigation and took the gas cap off and it was nasty inside so I replaced it so I'm thinking problem solved. The bike was running fine for a couple of days now its doing it again.

Please I want to ride and I need some help.

I'm having the same issue I got a fault code 23 camshaft sensor, the fuel gauge flashes back and forth between full and empty. On my fuel pump plug I have one constant 12 volt and the ground has good continuity but one of them is supposed to come on for a few seconds and show voltage and go off and it's not I've replaced everything on this bike including the wiring harness The ECU I bought used and the relay box I bought used I even bought a new camshaft sensor and it still showing the same thing even though I've tested the camshaft sensor it works anybody has any idea what's going on this thing I'm sure appreciate a tip cuz I'm about ready to set this son of a b**** on fire

Maybe it's lit and hazmat scraped it up already. Grn would have hit this post with a 'look and see if the crank sensor disc is loose.'

He'd mention thru the posts back and forth that there were no codes with key on only. I knew right there it was not his cam sensor. Told him not to but he did anyway. The muzzy adjustable advance crank sensor disc was loose. So both are intertwined somewhat. I'd look there, pilot.

hey I've got an 13 zx14r with only 9600 miles. It started with not getting power to fuel pump. I had accidentally connected the short ground from under the seat to the positive on bat.
Well I replaced all wires that got damaged.
But the ground on the inside of tank from fuel pump is fine. But the ground on the outside where the pigtail from pump to wire harness. The ground is not good. And I'm getting a 39 code. Which is the can high wire. Tested the relay box and ECU and purchased both just
Incase but nothing helped.

If you checked and tested all the fuses including the 2 near the starter relay it's probably time for a harness. Most likely hidden damage unless you've removed all the harnesses, tape and shielding. Power to ground circuits are never good, cluster damage is also a possibility.

83, check the ground wire that mates with the battery negative cable from battery. Sometimes that cooks thru the harness. Ask me how I know.

OK update on current problems with my 2013 Zx14. Still no luck. Now I have replaced the wiring harness. I can manually power my fuel pump with a power probe from the pump all the way to the relay box and it seems fine but it won’t turn on through the wiring. Like no signal from ECU. Maybe? I have even added a good ground from the engine by starter to the frame by battery. No shorts in the wiring but I’ve been through 4 relay boxes where all of them has something that doesn’t come on or off. Like the fan staying on constantly. Or starter not turning over. Everybody I’ve had look at it walks away scratching their head. I’ve had people swearing they can fix anything on a bike but can’t figure out what is going on here. Fml Idk I’ve went over this bike from end to end with absolutely no luck. Been working trying to get it going for over a year now. Please anybody with some knowledge on this issue please help.

* Last updated by: Dkelley83 on 1/23/2026 @ 1:07 PM *

New harness, new relay, might be the ECU failed when the swingarm broke and rubbed the wires inducing a backwash to the ECU?

Got a friend with a ZX14 within 2015 and below?

Where are you located? I'm pretty sure these bikes run with the instrument cluster disconnected, you might want to try that. The three wire tipover switch mounted on the cluster support could also be an issue as it cuts power to the fuel pump circuit if the bike goes down. I have a 2012 non-abs cluster if that might help? I'm located in Bossier City LA.

What is the part number on the ECU?
I have a spare with Ivan's latest flash, along with all the relays.
I also have a late model cluster, year unknown, that changes from black to white face...2016 maybe?
Let me know...
Hank

just popping in to express admiration for our loyal members. Thanks Fordtech and HanksZX.

The part number for the ECU is 21175-0839. That number is stamped on the ECU but when I looked them up a while back I only seen the 0838 so not sure why it’s different. I had purchased a flashed one a few months ago but it didn’t help so I returned it thinking it wasn’t my problem. Since then I’ve replaced everything else so idk… I’m located in Anniston, Al

0838 is a 49 state ECU while 0839 is a California ECU.
If you already tried an ECU, it's very doubtful mine would be of any help.
The ECU I have with Ivan's flash will interchange with the 0838 but not with the 0839.

Yes the only difference is the evap. Which not controlled through the ECU. I’ve already deleted it anyways. When I tried an ECU I think it was when I still had other issues going on. Now that I’ve replaced the harness I’m hoping it’s not the ECU maybe ?rectifier?. Even though I checked it and it seemed fine. At this point I’m lost. There’s not much more to it. It has new plugs, new injectors, new fuel pump, harness, and relay box… wtf the only thing would be the rectifier or ECU. Is there something I’m not thinking about?

If I understand your posts. you tried an ecu prior to changing the harness.
It didn't work so you returned the ecu...then you replaced the harness and it still doesn't power up the fuel pump.
You would have to try an ecu again to eliminate that as the source of problems.
Tip over switch is pretty simple to check or bypass, I think...that would cause no power to the pump.

It’s not the tip over sensor. I really think it’s gonna be the ECU. This bike started with fuel pump not getting ground signal. Then started getting ground but the can hi wire wasn’t sending/receiving. Then that started working but injectors not getting ground to pulse. Now that’s working but the fuel pump is doing this again. It has to be the ECU.

Per Ivan, the 2012 ecu #0714 will interchange with the 2013 ecu #0838.
I tried it on my 2013 with ecu #0839 and it started and ran but sounded terrible.
I never even rode it.
If you are interested, I'll sell you the flashed ecu and offer a full refund minus shipping both ways if it doesn't solve your problem or if it doesn't run well.
I had Ivan flash my 2013 ecu #0839 with the same flash and it runs great with much improved throttle response and increased drivability. It makes more power yet increased my fuel mileage, consistently at 46-48 mpg with 50-51 mpg on occasion.It also runs cooler. I also have the rubber mount and the 3 relays...
Let me know if that interests you.
Hank

Yes I am interested. How much you thinking?

I'll give you the flashed ECU for $350.00 shipped/insured.
I'll throw in the mount and the relays at no extra cost.
I paid $250.00 for the stock ECU and $350.00 for the flash.
If it doesn't work for you, return it for a full refund minus shipping.
Hank

OK another question… is that 0714 off a bike with abs or non abs? I’m pretty sure it’s non abs. If I’m not mistaken the Zx1400E is non abs. Where as the zx1400F has abs.

0174 was from a non-abs 2012..
The 2013's were available both non-ABS and with ABS
I think I remember Hub saying the ECU has nothing to do with the ABS, but please check with him to be sure.
I could also give Ivan a call for his take on it.