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08-15-2017, 07:37 AM | #1 |
Join Date: Jan 2017
Location: Lahore
Posts: 186
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Zongshen RX3 : Unexpected Dead Engine in a deep forest tour
Hola; fella riders, I hope you guys are doing great,
I jut finished up reading few threads by spud for trouble shooting RX3 as I just came back from a exhaustive long tour, nevertheless it went excellent but I had to manage a serious problem which occurred in My RX3 along whole tour in order to complete it and come back home on it... BACKGROUND # The bike creates a "bzzzzzzz" sound when you "ON" the engine cutoff on right side handle grip... for a while when the needles are moving on speedo meter as well.. and then bike EFI red Icon shows up in order to indicate that bike is ready to fire up the engine.. MY bike does the same every time I urn on that button before starting it as well.. PROBLEM# BUT on 3rd day of tour on a fine morning I turned on same button and noticed that sound did not occurred I ignored and continued to load the camp and sleeping bang and fill up the trunk.. finally I hope on to seet and pressed self start butting.. bike did cranked like trying to start up but nothing happened.. I switched on/off the ignition button again but no sound came again... I asked for push start to fellow rider we pushed it but no success.. then I hopped off checked all electric jacks and wires to fine any losing but every thing was firm and fine, i tried ignition switch on/off several times again.. no success.. then we removed the seat got access to EFI component and checked its jacks they were firm as well.. then we tried more on/Off then I tried 3 cycles on/Off to get any DTC code but no code appeared... indicating EFI is fine.. after half an hour we were sitting and trying to release that the Chinese bike is dead... the bike out of no where created that "BZZZZ" of fuel pump... (no one was fiddling with the bike and bike was assembled and tried to fire up... with no success) the only thing was that bike was switch on and left after hope less attempts... after we noticed the BZZZZ I went and pushed the start button and it started.. for next 3 days I faced the same behavior ... it will die here ever it likes... now I am home but I have no idea what is wrong with it.. I do plan to dissemble its whole tank and all wires and clean all jacks and wire it up again , check fuel filter, as no error codes are shown till now... so I am pretty sure some things lose in wiring... lets see how much success I get after this exercise.. My question to fellows here is that did this happened to any one else... ? If feul pump do not BUZZZZ 'z'z'zzzz on start up check what does that indicates ?
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Prime RX3 from Pakistan - Adventure Touring# RX3 - 2017 - Dirt Machine# FSE-450 - 2022 - Classic# Honda CD175 - 1977 - Daily Runner# 1992 - CG125 (engine swap CB250 Sleeper) - Project#1 : 1995 - Honda C70 w/ 180cc engine swap |
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08-15-2017, 03:07 PM | #4 |
Join Date: Oct 2016
Posts: 347
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I'd check to see if power is present at the fuel pump when it won't start. Bad connectons can cause strange failures but a connection doesn't usually fix itself while knowone is touching it. I suspect the fuel pump was trying to turn but for whatever reason had difficulty and then overcame this resistance eventually making the buzzing. No fault codes will appear from a bad fuel pump either.
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08-16-2017, 05:35 AM | #6 |
Join Date: Jan 2017
Location: Lahore
Posts: 186
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I am trying to recreate the problem as it happneed in forest, right now while standing in workshop it "BXZZZZ" every time the mechnic on/off the ignition button...
even though we today cleaned all jacks of wires with WD40 and tried to trace any lose wire but every wire and jack was firm and tight already and each time we on/off ignotin it will buzz... so we assembled it back and just about to leave shop i turned it on and there was not more BzzzZZZ .... but then after few self start atttempts it did started but not able to ide unless i keep a little throtle pushed... I was already late to work so i came back.. so the problem persists...
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Prime RX3 from Pakistan - Adventure Touring# RX3 - 2017 - Dirt Machine# FSE-450 - 2022 - Classic# Honda CD175 - 1977 - Daily Runner# 1992 - CG125 (engine swap CB250 Sleeper) - Project#1 : 1995 - Honda C70 w/ 180cc engine swap |
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08-16-2017, 05:37 AM | #7 |
Join Date: Jan 2017
Location: Lahore
Posts: 186
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yes we need to do it this way... but we need to first able to recreate it every time to trouble shoot it ...
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Prime RX3 from Pakistan - Adventure Touring# RX3 - 2017 - Dirt Machine# FSE-450 - 2022 - Classic# Honda CD175 - 1977 - Daily Runner# 1992 - CG125 (engine swap CB250 Sleeper) - Project#1 : 1995 - Honda C70 w/ 180cc engine swap |
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08-16-2017, 10:11 AM | #8 |
Join Date: Dec 2016
Location: Western PA
Posts: 363
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Can you run a meter across the fuel pump electrical connections?
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08-16-2017, 02:13 PM | #9 |
Join Date: May 2007
Location: Warshington
Posts: 928
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Could the ignition switch be bad and not connecting all the circuits repeatedly?
rj
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08-18-2017, 07:58 PM | #10 | |
Join Date: Oct 2016
Posts: 347
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Quote:
Check for power at the pump if possible, the RX3 uses a fuel pump relay as seen in picture. |
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08-21-2017, 09:50 AM | #11 | |
Join Date: Jan 2017
Location: Lahore
Posts: 186
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I am just sad my bike now do not start any more and self starts just died the batter too... :( its summer and every body is out there..
i have dismantled the whole tank i noticed while draining fuel there was water contamination as well about a hole glass of water blackish and slimeeeee.. i serviced the fuel pump now i am trying to find professional help.. no idea.. this is 3rd world country almost no efi bikes or technician here.. I have to talk to some car mechanic and make him agree to look into this.. i order odb scanner on aliexpreess i dont know if it will help.. i am getting night mares these days... no sleep.. Quote:
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Prime RX3 from Pakistan - Adventure Touring# RX3 - 2017 - Dirt Machine# FSE-450 - 2022 - Classic# Honda CD175 - 1977 - Daily Runner# 1992 - CG125 (engine swap CB250 Sleeper) - Project#1 : 1995 - Honda C70 w/ 180cc engine swap |
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08-19-2017, 03:23 AM | #12 |
Join Date: Jan 2012
Location: ChCh , NZ
Posts: 2,265
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As said... I would look at the fuel pump relay first...
the buzz when you turn it on is the fuel pump priming the injector/ bringing it up to pressure so it is ready to go when it is triggered once you hit the start button.. (well is on a yamaha.. most bikes work the same way) .
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08-21-2017, 09:58 AM | #13 | |
Join Date: Jan 2017
Location: Lahore
Posts: 186
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ok... I am going to change the relay first now for sure... will post again after checking..
Quote:
__________________
Prime RX3 from Pakistan - Adventure Touring# RX3 - 2017 - Dirt Machine# FSE-450 - 2022 - Classic# Honda CD175 - 1977 - Daily Runner# 1992 - CG125 (engine swap CB250 Sleeper) - Project#1 : 1995 - Honda C70 w/ 180cc engine swap |
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09-12-2017, 06:35 AM | #14 |
Join Date: Jul 2015
Posts: 36
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-Replace / check fuel filter if is not block
- check the full injector if is not block - Test the pressure in the cylinder - check exhous if is not blocked |
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09-13-2017, 06:06 AM | #15 | |
Join Date: Jan 2017
Location: Lahore
Posts: 186
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Quote:
2 - How can I check injector by removing it and seeing it if it sprays ? 3 - Pressure was fine I checked it as a the first thing 4 - exhust is not choked as well its fine.. I just got exhusted that day .. will debug further on comming weekend.. Damn thins EFI thing is complicated, I never worked that long to fire up a carby bike...
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Prime RX3 from Pakistan - Adventure Touring# RX3 - 2017 - Dirt Machine# FSE-450 - 2022 - Classic# Honda CD175 - 1977 - Daily Runner# 1992 - CG125 (engine swap CB250 Sleeper) - Project#1 : 1995 - Honda C70 w/ 180cc engine swap |
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