FE570 Hard Starting

I've put up a similar thread in the past but I have now just replaced the piston and rings, shimmed the valves, fitted a new plug and adjusted the TPS and I am still having a hard time starting the engine.

It cranks over fine....nice and fast but takes a long time before it starts to fire and run. Once it is running it runs fine.

Could the problem be a faulty injector and is there any way of testing and cleaning it??

Any thoughts??

Thanks

Testing probably yes, I don’t know. Spray pattern and volume are tested, but idk how exactly.

What fuel filters do you have? I’m with forum member Jon Andersson here: No filters after the fuel pump except a high-quality add-on inline filter (e.g. Golan super-mini filter). No filter in the injector housing. They plug up.

Injector can be cleaned in an ultrasonic cleaner I believe. That is a quite thorough method. but rather involved if you don’t have a cleaner. Another useful way is to open the injector by connecting a 9v battery to it to open it and then blow compressed air into it (“in reverse”). This method is also courtesy of Jon.

Anyone nearby that can lend you an injector? I would if you were close

btw - Is it easier to start when it’s hot?

Or is restarting always slow?

(They should fire up very quick btw.)

Tourist, I have a 570 that is very hard to start when cold, but starts immediately when hot. What are your thoughts on it? Thanks!

I wish I knew The stuff that Lancer has checked is stuff that makes sense to check. TPS is subtly important!

There’s also a choke button and idle speed adjuster btw! And these bikes are supposed to have a rather high idle - 1800-1900rpm as per the 2012 manual updates. which feels high before you get used to it.

When I had a weak battery I had to give mine a liiiittle throttle to cold start. Slight throttle and then release it. People here theorized it might be a slight combo of fuel delivery and the open throttle allowing for slightly more compression.

Jroble, it sounds like a TPS adjustment. If it’s not, you should start by checking it’s setting. If not done to eliminate this, it can cause confusion determining other issues. It’s not a difficult process.

Lancer, it sounds like TPS. Should be 0.64V.

Buy an ultrasonic cleaner off eBay. Do a full clean. I get fuel injection cleaner from Supercheap and use that. Once it’s been through it’s process I open the injector with 12v. I made a connector to attach the injector then blow out with compressed air.

I run a fuel sock in the tank neck and a ZipTy Golan at the quick disconnect. Remove and DONT replace the thimble filter at the fuel rail ONLY if you have the ZipTy filter fitted. It’s fuel injected. Fuel injection is temperamental. You need to upgrade this by those suggestions mentioned. It will help prevent any issues that you don’t want to experience out on the trail.

Is your idle at 1,800 rpm? Set this before you do your TPS.

Thanks Alan! for bringing clarity!; I had mostly guesses & hunches

Would you recommend any particular type or brand or price range of ultrasonic cleaner?

(like impact drivers, torque wrenches, OBDII readers, tubes of threadlocker, Husabergs, and Nintendo consoles, every home should have one)

Thanks Alan! I'll check it.

Hey Guys, thanks for the input and suggestions. The only thing I haven't done is replace the fuel filters which I am about to order now. I hadn't replaced them up until now because it runs fine once it's running. The only time it will start straight away is when it's stopped and started within a couple of secs......wait a minute and it'll take 15 - 20 secs to start again

TPS is set to 0.638v which is as close as I could get it to 0.64 and it made absolutely no difference to the original 0.38v it was set to before I adjusted it.

Anyhow I'm going to replace the filters and clean the injector and will let you know how it goes once it's done.

Thanks

Lance

tourist said:

Thanks Alan! for bringing clarity!; I had mostly guesses & hunches

Would you recommend any particular type or brand or price range of ultrasonic cleaner?

(like impact drivers, torque wrenches, OBDII readers, tubes of threadlocker, Husabergs, and Nintendo consoles, every home should have one)

Click to expand...

Mate, I run one of these. I find it brilliant. I can soak for hours at 70*c then run it for the ultrasonic clean.

This is my unit. They have gone up in price. I only paid $60 but these are so well made.

https://www.ebay.com.au/itm/Digital...57.m570.l1311.R1.TR12.TRC2.A0.H0.Xultras.TRS0

Oh, and mate, you are spot on....every Fuel injected bike owner should own one. But I tell you what, it has been brilliant cleaning carby parts. I have a 2T that sits here for quite some time that refuses to start unless I clean the carb parts in the cleaner.

Lancer, it may be a faulty TPS if the adjustment makes no difference

Guys, AliExpress have ultrasonic cleaners pretty cheap.

https://www.aliexpress.com/item/Fre...65ae-42dd-b0c8-4c0ee81400bc&priceBeautifyAB=0

Alan said:

Lancer, it may be a faulty TPS if the adjustment makes no difference

Click to expand...

Hey Alan......I can adjust the position of the TPS and the voltage changes which tells me the TPS is working. I am fairly sure the problem is fuel related as it'll fire straight up after the engine is shut down and started again within a few secs...Wait a minute and it'll take 15 - 20 secs to get it going. Whilst cranking the engine tries to start and it seems like it's building up fuel pressure before it'll start.

Once it's running it runs fine and doesn't miss a beat nor is it lacking...anywhere!!

We have a guy here with a 390 and he just blips the starter and it starts right up so there is something not right with mine

I have the filter kit on order and am waiting for it to arrive then I'll get to work and see what I can find and I'll post the results when I have it sorted

Sounds like it could be a pressure issue. I’d have a look at the spray from the injector.

Could be that your fuel pump is getting weak or lost its seal/prime

Try just tapping starter button for a 1/2 second. Do this multiple times. Then try to start. If pump has cycled enough to warm up then bike should start easy.This will tell you if pump is dying. Running low on fuel makes the pump heat up too much which shortens its lifespan.

Thanks for the input....When I tap the starter the pump runs as it's supposed to. I'll pull the pump out and check it when I get the filter kit and I'll check and clean the injector

I'll let you know what I find

The filter kit finally arrived today so I got to work and pulled the fuel pump, filter and screen out. I never really had to pull the filter all the way out before I could see what the problem was. The fuel filter was black and discoloured and was chockers with fine black silt. The date on the filter was 2012 so it had been in there a while!!!

I looked for the small inline filter which sits inside the fuel hose quick disconnect or the fuel rail inlet but wasn't in there......It must have choked up and had been removed and not replaced so I also ultrasonically cleaned the injector and back-blew a heap of black crap out of it also.

Now it starts straight up like it's supposed to and I am looking forward to seeing how it runs on a ride.

Anyhow I have ordered a spare filter on ebay at a fraction of the cost and will change it on a regular basis now

You are in for a pleasant chock now when the engine is not starved anymore

I thought I'd put up a quick update to let you know what I found after a few hours riding......

After replacing the filthy filter with the genuine filter/screen kit and ultrasonic cleaning the injector the engine was a lot easier to start until I took it out and gave it a decent ride and the hard starting was back almost as soon as I went to start it again....

I had a few guys tell me to clean the injector with it open (energized) which I hadn't done when I did it before. So this time when I removed the injector I thought I'd make an adapter to energize it with a 9v battery to open it whilst it was cleaning. To my surprise I already had one which I had made to test small LCD displays. This time I took a closer look at the injector and found it had a small filter screen pressed into the injector inlet which I had seen but not paid any attention to what it really was.

BINGO.......I had cleaned the injector previously and the dirt was then trapped inside the injector and had no way of blowing it out. I did a bit of searching online and found the filter was quite easily pulled out which I did. Upon close inspection I found the screen was full of fine particles trapped in the mesh.

I bought a liter of injector cleaner, energized the injector and ultrasonic cleaned it for 30 mins. I then reverse blew it out whilst energized and then blew brake clean through it to check the spray pattern and was surprised how much better the fuel atomized compared to previously

My bike, a 2011 FE570, didn't have the inline filter in the quick disconnect so I bought the fittings and replaced them and fitted the filter and now carry a spare in my bum bag.

Starting it now is a breeze and it starts in a fraction of the time it did previously and pulls much stronger than before so I'm happy to say it's now fixed.

I thought I'd share this as I have read other guys having similar hard starting and I have not seen anywhere mention of an injector inlet filter.