Sparking Issues / Rough Idle on GV125-S Aquila [SOLVED]
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Bike Model = : GV125-S Aquila EFi Bobber
Does anyone know if the ISCV plunger should be free to move by hand? I’m troubleshooting rough idle and loss of power when setting off, so I dismantled the ISCV hoping the O-ring would be the fault. It wasn’t at fault so now I am questioning whether the plunger has seized as it doesn’t seem to be able to move when I put pressure on it.
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upload a picture here to see what has happened to the plunger ?
It should normally be straight so it goes in and out easily , otherwise if it was jamming inside, it would have worn the circuitry inside the unit, it should only move when the ECU operates it.
Check your inlet manifold o-rings, air can leak through there if the small O Rings have given up.
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seems to be OK, doesn’t look burnt or even bent , so i would also next time check the intake system any splits in the air lines , and the intake manifold o-rings themselves if issue continues, a dead iscv wont even allow the bike to start and idle. I had to replace an ISCV from someone’s older 2015 GV which is totally different from yours but the bike screams for 1 second, then dies right away. As soon as a new one was fitted, it idled OK. I found out the ISCV unit was soaked in water, bike was left to rot outside without a cover, that poor thing but i digress!
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If its the Spark Plug Leads rubber sleeves , you may need to check the coils are not “arc-ing” (sparks leaking out of them or out of the plug) which i would be careful touching the cylinder heads as you will get shocked! (I found out the hard way many many times fixing customer bikes)
If the “inlet manifolds” which hold the injector bodies to the engine have split, i can’t tell, you will have to remove them and inspect their o-rings to show us if possible.
It looks like the electrical side and intake side where you’re looking at is now the issues , i don’t think the ISCV is the issue yet. (It wont work or fails early if its over-working to try maintain a stable idle where the bike is leaking air in other places or dropping sparks for a split second thats your caps and coils (hence every GV owner we know replaces the coils and caps as the 1st priority, then worry about making sure there is no air leaks before closing the bike back up)
Strip her down and investigate deeper on those intake pipes.
Regards
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