Don't die like this, DL1000! - Page 2 - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
V-Strom Service and Maintenance Questions and Discussions Share your service and maintenance information-questions. Please include your year and model in the text of your post.

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post #11 of 63 Old 07-09-2018, 12:55 PM Thread Starter
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Quote:
Originally Posted by dmfdmf View Post
What is WFO?

It may be a flaky Fuel Pump Relay which also powers the Fuel Injectors. Throwing parts at a bike that won't run can get expensive real fast so you need to test it but I don't know if there is a test procedure in the service manual for the relay. At the very least pull it and clean the connectors and (gently) bang it around a bit to loosen it up if the latch inside is sticking and not fully engaging. Also, if you examine the wiring diagram maybe there is a way to bypass it to get power to the pump/injectors as a test. Be careful what wires you jump as the relay is controlled by the ECU and you don't want to fry that.
Wide :|:|:|:|in' Open - Max throttle. I tried WFO and cranking to make sure I wasn't just flooded.

Re: the Relay - The Relay's test procedure in service manual is pretty much "Does it close the circuit when you put power through the control circuit?" I've not actually tested yet but poppin' it out for percussive maintenance and connection cleanup won't hurt and is dead easy. It goes audibly "click" and the pump goes for my test (I did perform the scientific "put ear near it and listen" test.)

I assumed that a relay's failure state was NOPE, but if it was intermittently working I suppose that would make sense as a culprit. Tonight is percussive maintenance night.

Given the age and hard livin' of my Strom, and the incredibly small amount of time I have to work on it with three jobs and two young kids, throwing a part vs. doing a bitchy test has a breakeven amount around 40-50 bucks these days.

-RMRR
'05 DL1000 - Dead at 66K miles.
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post #12 of 63 Old 07-09-2018, 12:57 PM Thread Starter
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Found of picture of when I pulled the pump last time to do the filter bypass. My garage is much upgraded (IE: Have one), but there's more grey in my beard now.
Attached Images
File Type: jpg prufeshnul.jpg (26.6 KB, 81 views)
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-RMRR
'05 DL1000 - Dead at 66K miles.
Nerding it up at Wheelnerds.com
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post #13 of 63 Old 07-09-2018, 06:12 PM
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My money is still on a weak fuel pump. A pressure test will tell. (Or if there's a friend with a strom nearby who will let you put his tank on the bike and see if it runs.)

I don't want a pickle, I just want to ride my motorsickle. A. Guthrie.
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post #14 of 63 Old 07-09-2018, 08:37 PM
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Good ole first gen 1000's......never cease to amaze me.

BRIAN "GO Buckeyes, GO Wildcats"!

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post #15 of 63 Old 07-09-2018, 09:36 PM
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I'm not as familiar with the 1st gen's fuel system, but a guy at work that runs a Suzuki (not V-Strom) had a cracked injector once upon a time which could not stop the flow of gas into the cylinder. I didn't get the full details from him on failure presentation, but when you said that the plugs were black and fouled the thought of excessive fuel crossed my mind. I don't know if the Vee has individual injectors or a common throttle body injector, so I'm not sure that it would/could affect both cylinders. And the odds of individual injectors both cracking at the same time are pretty slim.

Did the new plugs turn black?

If it is a lack of fuel, then is it possible that the fuel rail has become obstructed after the filter? Say a small chunk of your extender line caps was ingested by the engine vacuum? Do the throttle body balance ports even lead to some internal critical air or fuel jet/orifice?

Just throwing around ideas... As I mentioned, I am not too familiar with the Vee fuel system.

Most recent changes are typically the first place to look, but you can't rule out an entirely new failure of some sensor or some such nonsense.

Any chance that the new stator/magnets are overcharging? Regulator not holding it down to 14VDC? Maybe a high voltage spike fried something?
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post #16 of 63 Old 07-09-2018, 09:58 PM
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If the plugs are wet with gas in both cylinders then it's an ignition problem. If it was only one cylinder then it would probably be a coil but since it's in both cylinders it's something else. Probably in the wiring. My 2 cents.

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post #17 of 63 Old 07-11-2018, 01:18 AM
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I suspect that an O-ring seal in or on your fuel pressure regulator has failed resulting in inadequate amounts of fuel entering the combustion chambers or otherwise causing the fuel injectors to not function properly.

Take a look at this thread on the VSRI forum. The start then gradually die symptom seems very similar to what you are experiencing. https://www.vstrom.info/Smf/index.ph...c,33105.0.html

If I’m right you will most likely need part #2 on the drawing that shows the exploded view of the fuel pump installed in 2004-2006 DL1000s. On that diagram the fuel pressure regulator is not shown separately. However, if you look at the diagram for the 2003-2003 fuel pumps the fuel pressure regulator is shown as external to the high pressure fuel filter cartridge. I don't know if that is an error on the K4-K6 fuel pump diagram or the fuel pressure regulator is actually inside the high pressure fuel filter cartridge for the K4-K6 year model bikes.

https://www.ronayers.com/oemparts/a/...model-k4-k5-k6

I haven’t looked up the details of the fuel pump that you have ordered but i’m concerned that it may not include the fuel pressure regulator. However, you may only need the O-ring that is installed on the outside of the fuel pressure regulator. Note that on the fuel pressure regulator that failed in the VSRI thread that I've referenced the O-ring that failed was enclosed in a plastic housing.

In the owner's manual for my 2003 DL the fuel pressure test requires several special tools. If your fuel regulator is external to the high pressure filter cartridge you could just replace the O-ring external to the fuel pressure regulator and see if that cures the problem. If it doesn't then you will have to find a dealer or other shop that can test the fuel pressure regulator for proper function before purchasing a replacement.
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Last edited by bikeflyer; 07-11-2018 at 09:08 AM.
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post #18 of 63 Old 07-11-2018, 09:56 AM
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From auto experience, not bike experience. I had most of the same symptoms from a fuel injected car a couple of times. One instance turned out to be fouled fuel injectors. The fuel rather than spray, flowed in a stream onto the intake valve so it didn't atomize. It was fine until the car warmed up.
Another instance involved an enrichment valve where more fuel was sprayed during warm-up. With it not working, too much fuel was being sprayed when the engine warmed resulting in rich mixture and stalling. I don't know what the bikes use but I hope my experiences can help with the diagnosis.
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post #19 of 63 Old 07-25-2018, 01:39 PM Thread Starter
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Quote:
Originally Posted by bikeflyer View Post
I suspect that an O-ring seal in or on your fuel pressure regulator has failed resulting in inadequate amounts of fuel entering the combustion chambers or otherwise causing the fuel injectors to not function properly.

Take a look at this thread on the VSRI forum. The start then gradually die symptom seems very similar to what you are experiencing. https://www.vstrom.info/Smf/index.ph...c,33105.0.html
Nice Find. It does sound right.

Part 2 is all sold as one piece and includes the regulator. The regulator is not included in the Fuel pump kit I ordered. I ordered a different regulator which, like the pump I ordered, isn't gonna work. The Swift Pump is not suitable for my K5 (wrong shape/bottom/wiring.) Pictures of later years make it look like it'd work. (facepalm) I could probably get it in there with some jiggery pokery but I'm not thinking that's a great option.

Now that I can see the pump I've ordered a correct replacement from my friendly fly-by-night ebay seller. The FPR is accessible but they don't seem to sell it separately. It wouldn't surprise me to learn that the O-ring is captive in the Bigass Plastic Filter Contraption. Everything else in that expensive and not-super-servicable abortion of good sense seems to be.

NEXT:
I'm in hurry up and wait mode (again) now while the guy with the donkey shipping the pump gets here. That's gonna go in and we'll see what happens. If the pump doesn't square me away I'm going to pop open the generator cover, verify that the Crank position sensor is still set up right and not covered with mystery gunk or something dumb, then to the FPR and a descision on whether I try to rig a replacement or bite the bullet and shell out for the damn assembly.

-RMRR
'05 DL1000 - Dead at 66K miles.
Nerding it up at Wheelnerds.com
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post #20 of 63 Old 07-25-2018, 02:22 PM Thread Starter
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For fun, I just ambled out the garage (I work out of my basement some days) and gave the old FPR a tug to see if I could check the Oring.

The FPR is accessible but it is in there but good. Reasonably hard pull by hand doesn't dislodge it. The guy in that thread you reference had his FPR blowing off at 10psi, which would certainly create a sucky situation as seen with me. :| Ah well, a 200 Dollar stupid filter housing is less than a new bike, and I can keep my beloved Strom. (my wife observes when I threaten to shitcan it: "You are pissed because it is broken and you love it, not because you actually hate the bike." She's smart.)

-RMRR
'05 DL1000 - Dead at 66K miles.
Nerding it up at Wheelnerds.com
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