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Missing off idle issues

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16 views 8 replies 3 participants last post by  Missing Link  
C
#1 ·
Hello let me start off with the history of all the money Ive spent trying to get a a solid running bike. I really thought the issues ive been having were my lack of skills and knowledge but now im wondering maybe this thing is curesed. I have a 03SV1k with 12k. Mods are PC6, K&N, TRE, Dominator Cans, Pair delete, stock gearing. I have a miss off idle that is beyond irratating. Had the Suzuki dealer adjust the valves which were dead on according to them. Fuel pump, reg and filter all new. At time of valve service mechanic stated reg. was dislodged and an o-ring on the rear injector had a slice in it. The fuel reg. had been popping out numerous times prior to the dealer service enough times that I followed a thread on here to use a stainless band to secure it in place. When I was fed up with this issue is when i took it in to make sure the valves were good to illiminate maintenence issue for the cause of the miss. When I picked up the bike the mechanic informed me the off the issues I mentioned before. I asked if the banding on the reg. was still in place because he had stated the the reg was dislodged causing fuel to dump un-regulated. An answer I didnt get a clear answer t3o.... Listen people I am not a mechanic but im not an idiot ether. Would someone for the love of God help me out with this im frustrated and going broke. I recently bought the PC6 had it installed and software tuned. NOT DYNO tuned. The mechanic at the Dyno-Jet factory outlet informed me that A dyno tune wasnt needed. Being at my witts end and being close to home I allowed him to install and use a mods only Map for the tuning. I have never been so frustrated with a motorcycle in my life and ive jetted many in-line 4's with 4 into-one exhuast systems with far less agravation. If anyone has any input to help me out I would greatly
appreciate any exspert advice. I pulled cash out of my retirement to buy this thing and its been noting but grief.... Thanks
 
#2 ·
Firstly, get a beer, or, if it was me, a large ice filled glass of straight Jack Daniels.....

I know its frustrating as hell when this crap happens, i sympthise with you and understand where you are.

The reg thing is an arse, and if is still happening, my next question is, have rreplaced the main filter, or, have you done the fuel filter bypass mod ?
I suggest this, because if the filter is blocked, there will be all hell happening.
Its so damn expensive to replace the OEM filter, but, the bypass costs pennies.

So, thats one question, next is.....

Have you ever renewed the end of the plug leads ? Meaning, you can screw the plug caps off, and then trim 5mm (1/4") off the lead, then flush the end with contact or brake clean, and also
wash out the spark plug boot, then screw it back on to the lead. And wash out the spark plug wells....they get crap in the front one especially.
Both leads, but, the front is usually the worst, they get old and create resistance. It is surprising how much better things are after this, not saying its a definite, but, leave no stone unturned.
Time is the only cost one this one
 
C
#3 ·
Missing Link said:
Firstly, get a beer, or, if it was me, a large ice filled glass of straight Jack Daniels.....

I know its frustrating as hell when this crap happens, i sympthise with you and understand where you are.

The reg thing is an arse, and if is still happening, my next question is, have rreplaced the main filter, or, have you done the fuel filter bypass mod ?
I suggest this, because if the filter is blocked, there will be all hell happening.
Its so damn expensive to replace the OEM filter, but, the bypass costs pennies.

So, thats one question, next is.....

Have you ever renewed the end of the plug leads ? Meaning, you can screw the plug caps off, and then trim 5mm (1/4") off the lead, then flush the end with contact or brake clean, and also
wash out the spark plug boot, then screw it back on to the lead. And wash out the spark plug wells....they get crap in the front one especially.
Both leads, but, the front is usually the worst, they get old and create resistance. It is surprising how much better things are after this, not saying its a definite, but, leave no stone unturned.
Time is the only cost one this one
Click to expand...
Hello, both fuel filters are new and I did trim the spark plug wires but did not rinse the spark plug wells and I will do anyhing suggested here. The dealer solved part of the issue .... I guess. I tried the by_pass mod at one point and the issue still was there so I bought an aftermarket H/P fuel filter and reg. with new O-rings and FF and went back to the stock configuration. One thing noticable is the warmer it gets the worse the miss is...... I really dont want to give up on this bike plus im not one to sell a problem but somethings not adding up and im not sure if im being told correct info by the dealer or the tune guy and dont want to insullt anyone but the problem is not going away.. If anyone on this forum were to crack the throttle off idle they would immediately notice the problem..... Anyway thanks for offering up suggestions. I will give them shot and get back on here with results.....
 
#4 ·
The bypass filter, and properly bypassing the internal one by drilling would cure anything filter related. Going back to internal and new is ok.

The coils or coil may be failed with heat, or ar not earthing... take them off, clean the terminals and clean the mounting points on the chassis and coils.

Have you pulled the cam position sensor out of the rear cylinder head cover and cleaned that ?

Sidestand switch can be an issue, but, usually at revs. Vibes cause it to breakdown and its horrible. Bypass it to test
 
#5 ·
It's a longshot but have you looked into the throttle position sensor? Although rare, these can go bad. A smooth running SV1000 has to have an accurately adjusted one and if the adjustment can't be achieved, the possibility exists that it is bad. Sorry to hear of your continued woes.
 
C
#7 ·
Will do on the coils this weekend. I did pull the cam position sensor about 4 weeks ago and cleaned it off..... I noticed the miss if I'm at a stop light and blip the throttle it almost always will miss. Or if I gear down aggressively then to idle, the first blip will miss also. I was just double checking the tps in dealer mode so it had just got up to temp reached over and hit the gas and big stumble miss, blipped it again and no miss... I have not check coil values? But I'm hoping that's what it is. Guess it doesn't matter much that BLR Tuning was just there installing the PC6. The miss was there before so I don't think he's to blame. I just talked to him about looking at it again as he offers free tunes for the life of the bike.... so he tells me that the SV1000s have an issue with missing off idle, but I'll still look at it...... hes setting me up for failure bit I grinned and asked him to make me an appointment...... stay tuned for more hair pulling, hope it gets fixed soon my old a** is going bald.
Thank you guys
 
C
#8 ·
One more thing on the tps. At idle which is at 1400 to help the miss. When throttling up the line stays in the middle to around 2800 to 3000 before it moves up. Is that right or acceptable?
 
#9 ·
No....its not right... and old mate saying that about the SV's..... i call boolsheet....if they are working as intended, no.....
Stock the line should be 1250rpm, but, i found it was best at 1400, as you have set it.... and if working sweet, i would get the top line at around 1850.
Now, setting it at 1400 was a fine balance of getting that upper rev line movement.

So, it does sound like things are not well.

Have you used a multimeter to check the voltage and ohms ?

I have previously removed it and used contact cleaner in the TPS, not meant too, but, when push comes too.... and just work it back and forward to cleaner the resistive band.

Make sure its bone dry before powering up again. It may not fix it, but it may improve things. Only do this after you have looked at resistance and voltage readings as per the service manual
suggestions and wire choices


As far as testing coils, you need what is called a peak meter.... its a slightly specialised job to do.
 
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