DTSFab.com (Desert, Trail and Sand)
UTV's Off Road ( RZR, YXZ, Mini Buggy, Carts,etc.) => UTV Controls and Electrical => Topic started by: fastcorvairs on May 11, 2019, 08:47:30 PM
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Ok, guys. I have talked to Brian about this but still, haven't got any sparky. Drowning
Doing a front end on this busa car and the owner has been trying to start it and it doesn't fire. Ran when parked so it should run now. It has been a few years since it ran. He put new fuel in it and still no sparky. You can spray ether in the intake and it will fire right off. We have twelve volts at the injectors but really don't know how to check if the ECU is signaling a ground so it can open. When they wired the car originally they installed resistors in all the kickstand and other bull poop stuff so there is no doubt that stuff is right, So throw me some idea's as to what's wrong. Forty psi of fuel pressure. injector light is on, on the dash, have not idea what that means.
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What codes are showing? If it fires with ether it has spark. The issue has to be injectors not being triggered. You should be able to put a test light across the injector connector to check for ground signal. Check all the resistors. Check ALL grounds.
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What codes are showing? If it fires with ether it has spark. The issue has to be injectors not being triggered. You should be able to put a test light across the injector connector to check for ground signal. Check all the resistors. Check ALL grounds.
Where do you read codes?
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https://www.youtube.com/watch?v=MDOZdG_uSmI
(https://www.youtube.com/watch?v=MDOZdG_uSmI)
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+1 Lance!!
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i was at work when they called so didn't have a lot of time to talk. they did check and the inj's have batt voltage when key is turned on. not getting the ground signal from ecu. said all fuses good but the part that worried me is the own didn't disconnect the batt before welding on it and now it has no signal from ecu.
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now finding out what code it has will help for sure. if the fuel pump is wired through the ecu then the resistor in the factory switch ( if used) must be good or it wouldn't turn the fuel pump on either. some had a theft system but i believe that was a separate box. there is one common 12 volt wire with batt voltage and the ecu controls the grounds. i still have the suzuki manual some where. if you need it i can ship it to you.
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http://www.suzukihayabusa.org/forum/index.php?topic=146791.0
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talked to the owner fast.....didn't know he has a power commander III piggy backed in the system. need to unplug that and try and start.
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talked to the owner fast.....didn't know he has a power commander III piggy backed in the system. need to unplug that and try and start.
^^^^^^^^^^^^^^^^^^This
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The welding could have fried either controller. Just passing on "bad" info,I weld on my stuff all the time with ecu's connected but I pay attention to putting ground clamp very close to weld area. Voltage follows the path of least resistance.Never place any electronics in the path to ground from electrode. So far it has always worked for me.
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The welding could have fried either controller. Just passing on "bad" info,I weld on my stuff all the time with ecu's connected but I pay attention to putting ground clamp very close to weld area. Voltage follows the path of least resistance.Never place any electronics in the path to ground from electrode. So far it has always worked for me.
i have heard many state that and plenty of people don't have issues. i have seen that not work personally twice, so i always disconnect my batt. that's me though.
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now in carls case i am pretty sure he lost his bazzaz from a bad rec/reg.
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The welding could have fried either controller. Just passing on "bad" info,I weld on my stuff all the time with ecu's connected but I pay attention to putting ground clamp very close to weld area. Voltage follows the path of least resistance.Never place any electronics in the path to ground from electrode. So far it has always worked for me.
i have heard many state that and plenty of people don't have issues. i have seen that not work personally twice, so i always disconnect my batt. that's me though.
Disconnecting the battery makes no difference unless you mean you remove both + and - from the ecu itself.
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nope just the batt. i have personally seen two vehicles now that have had blown main fuses just from welding on the exh. after that i have always disconnected the batt and have never had an issue. now in my case my ecu has a direct ground wire to the batt not through the chassis.
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;D ;D
https://outbackjoe.com/macho-divertissement/macho-articles/car-welding-circuit/
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That doesn't protect the ecu.
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keeping the ground clamp close is always best. i have never seen damage from disconnecting the batt and i always have the extra 60 secs to disconnect. i have seen 2 cars lose the main fuse from not disconnecting.
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Welding current can travel just about anywhere. I had a braided brake line melt in two once at the rear of the car even though I was welding on the front and the ground clamp was just a few inches away. Never did figure that one out.
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RD came out yesterday and we run some test. fuel injectors were receiving a signal from the ECU and fuel was getting to the injectors. So RD pulled the injectors and fuel rail to have cleaned. We think the injectors have corroded shut. RD has a place up close to him in Valley Center KS where he lives that can clean and rebuild the injectors. More on this when we get them back.
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How long had it sat since running?
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well that's good to hear i guess. so he made sure he does have fuel getting to the injectors?i ask because if he's using the factory fuel pump and housing there's a fuel reg in that head that can go bad.
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How long had it sat since running?
I know for sure 10 years if not more.
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well that's good to hear i guess. so he made sure he does have fuel getting to the injectors?i ask because if he's using the factory fuel pump and housing there's a fuel reg in that head that can go bad.
All after market fuel pump and regulater.
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fuel pump relay effects inj's as well as a couple other systems btw so might still want to check that too.
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interesting read
If this code c41 comes on the problem is not your fuel pump, the FI light will not flash if the pump goes bad. The computer does not know if the fuel pump is on or off. generally the problem is in the fuel pump relay, the ecm, or a blown fuse. the hayabusa is good for some corroding on some of the connectors. check the fuel pump relay connector located under the front seat of the bike right behind where the tail section starts. You may have to take the tail section off to do so. Also check the connecter on the ecm for corrosion. If corrosion is there use CRC electrical connection cleaner and a small pick to clean it out. And then there is the fuse box located directly under the clutch lever, you will have to pull the left fairing for this. the box is under the black ram air cover. check the fuse it is a 10 amp mini fuse. the fuse in the box is at the bottom right second one up. most times it is either the fuse or the relay being bad. MAKE SURE YOU DISCONNECT THE BATTERY BEFORE YOU DO ANY OF THIS!
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C41 is always showing on mine. Doesn't keep it from running.
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the owner of the rail said he never noticed the fi light on before. his ecu had a diff code stored but it was fuel pump relay. he doesnt use it either like fabr and many others. he got his inj's back yesterday.....all 4 were fine and extremely!! close if flow rates! it wasnt the injns that are causing the no start.
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Yet it fires right off with ether. That means,to me,only one thing. They are not being triggered. Now,why. I'm leaning to fried ecu.
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Yet it fires right off with ether. That means,to me,only one thing. They are not being triggered. Now,why. I'm leaning to fried ecu.
kind of my thoughts too. i told him to pick up a set of noid lights and plug them to see. cheap and easy to test. his is an 2001 busa so 2001 only on the ecu. there are a few on ebay......i checked lol i did explain how to swap out to 02-07 ecu for the faster processor along with flywheel. that would set him up for newer controllers like bazzaz and the latest power commander if he wanted to. the unique aspect of the 2001 is the harness is already wired correct for 02-07 ecu just need the newer flywheel for the additional teeth. the 2001 crank sensor still works. i did this on my 2001 as bazzaz doesnt support 99 -01 ecu's. he did tell me this has happened one other time a while back. wouldn't fire off most of the day, sat over night, then fired right off the next morning. that what some time back so who knows but ecu controls the ground side so either its fried or not getting the signal to fire off.
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if the noid lights light up while cranking and the inj's are good then maybe it's possible the fuel reg is bypassing all the fuel back to the tank?
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I suppose anything is possible but I'd not think it likely.
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just a shot in the dark ;D
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Speaking of a shot in the dark,has it been checked for any obstructions in the fuel line/log? Maybe a collapsed line or something preventing fuel reaching the injectors? Bang bang
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It runs Yayyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
RD put the cleaned injectors in today and it fired right off. :nw Time to move on to finish welding this car back together now.
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and it was?????????
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and it was?????????
put the cleaned injectors in
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that is interesting. he said the inj's all passed when he sent them for cleaning.