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GreginDenver last won the day on March 16

GreginDenver had the most liked content!

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About GreginDenver

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  • In My Garage:
    '99 VFR800 49-state, '01 VFR800 49-state, (5th Gens rule!)
  1. No, there would be no FI light indication for a malfunctioning injector. The ECU doesn't get any "feedback" from the injectors, all it does is provide a path-to-ground (negative) for the 12 volt power that is continuously supplied to the injectors for the period of time (in milliseconds) that it (the ECU) has determined for correct fueling of an individual cylinder at any given moment in time. Actually there are FI light "blink codes" for if the ECU completely loses contact with one of the fuel injectors (a failed injector situation due to a loose plug or broken wiring for example), but there's nothing beyond that. If the ECU loses contact with a fuel injector (a failed injector) the FI light will blink a code and the engine will "fail safe" and will not start. But the ECU will continue to allow the engine to run with a malfunctioning injector. This is what makes diagnosing a failed injector or clogged injector so difficult. Because the ECU thinks it's doing the job properly. Same goes for a failed (or failing) fuel pressure regulator. In both of these cases there is no internal ECU fault indication. Your only indication is external, like your sudden drop in fuel economy and the smell of unburned fuel that shows the engine (or an individual cylinder) is running over-rich.
  2. You didn't mention the FI Light on the bike's instrument panel. If there's no FI Light illuminated the bike's ECU (and the various sensors that it monitors) are not compromised in any way. Just a thought (pure speculation on my part): fuel flowing through the injectors cools them as it goes through, remember that injectors are actually just as much a part of your bike's electrical system as they are part of the bike's fuel system. In a running-out-of-gas scenario one of your injectors may have overheated as electricity flowed through it without any fuel flowing an is now damaged (the injector's electrically controlled solenoid coil part). Your drop in mileage and the smell of unburned fuel could be caused by one (out of your four total injectors) sticking open. You can hand test the solenoids of injectors individually using a 9-volt battery and a couple bits of wire. Just making contact with the 9-volt battery will cause the solenoid of a healthy injector to move, and you will hear it make a little "ping!" noise.
  3. I guess it doesn't like the cold...

    Sounds like your 5th Gen's battery is about done, was it already weak before the cold weather arrived? All of the symptoms you listed are battery related. While the 5th Gen's PGM-FI ECU was pretty advanced for its time, I don't think they (Honda) included system voltage compensation for the coil dwell time (that sort of ignition control feature is a relatively recent development in both cars and motorcycles). So if your 5th Gen has a weak battery that's causing lower than normal system voltage the standard coil dwell time commanded by the ECU will not charge the coils well enough to get a good spark at the plugs.
  4. Normal Engine Coolant Temp

    Unfortunately the thermostat is buried deep in the "V" of the engine, under the Fuel Tank, Air Box and Throttle Body. Not an easy job but it has to be done, the bike will run so much better afterwards. 5th Gen thermostats always fail (eventually), but they don't all fail the same way. Some stick open, some stick closed, some develop a sticking (stopping) point short of either full open or full closed (or in between both). The resulting symptoms are sometimes hard to diagnose as thermostat related. You've got the most obvious case, and it's the worst case also. The VFR engine hates running cold. Good luck the the replacement. My advice (while you've got things disassembled) is to also replace the two short hoses that connect from the thermostat housing to the cylinder heads and replace the O-rings for the cylinder head connections. I refurbished a '99 a year ago (January-February of 2017), here's a forum thread of my work (with lots of pics and explanations) http://vfrworld.com/threads/refurbishing-my-99-5th-gen.52488/
  5. Newbie from north Alabama!

    Welcome to the forum. That's an interesting '92 you have there. Am I seeing a full Two Brothers exhaust system, or is it just the silencer can? I spend a lot of time in Huntsville, AL. I have two 5th Gen VFRs and I keep one of them in Huntsville (lots of family live there). If you decide to keep this VFR long-term the next time I'm in Huntsville I'd love to ride out to see it and visit with you and talk VFRs for a while. Greg
  6. Another possible cause of over-fueling is a failed fuel pressure regulator. If you don't have an FI light but you have an over-fueling situation it means the problem is not one of the sensors that the bike's ECU uses to make up its fueling computation. No FI light + over-fueling means that the fuel injector pulse width (the fuel squirt) being commanded by a perfectly healthy ECU is somehow being messed up somewhere down the line inside the fuel system. If your Fuel Pressure Regulator goes bad here's what happens: The bike's fuel pump is designed to produce pressure well in excess of the system's needs and the fuel pressure regulator takes care of the necessary reduction. All FI systems (both car and motorcycle) are designed this way because it means there's "overhead" available in the system for when the fuel pump gets older and weaker as its factory tolerances slowly get exceeded by long term wear. If the fuel pressure regulator fails it will allow the full pressure provided by the fuel pump to reach the fuel rail and injectors. This causes over-fueling because the ECU will still be commanding a fuel pulse-width that is (by design) perfectly matched with the proper fuel pressure (usually about 43psi, or 3 bar). So in the failed fuel pressure regulator scenario the higher fuel pressure (as high as 50+ psi) will push more fuel out of the injectors each time the ECU commands what would have been the proper fuel pulse width (for a properly regulated fuel system). Injector Pulse Width = a pre-determined base time period of Injector "open" command (part of the ECU's firmware load from the manufacturer) + dead time (the time it takes for the 12 volt electrical power to drive the injector to reach full open) + or - various fuel "trim" corrections (for things like altitude, rapid throttle movement, coolant temperature, intake air temperature, and etc.)
  7. Need coolant troubleshooting advice

    Based on my experience with the 5th Gen I'm surprised that you could be having problems with "air pockets". I have purchased and refurbished two 5th Gens in the last year and a half (bought my '99 in October 2016 and my '01 in October 2017). As I mentioned I did a thorough refurbishment on both of these bikes and I remember being pleasantly surprised at how easy it was to completely refill the coolant. I barely even had to "top off" the system on either of the two bikes after the first run of the engine up to full operating temperature (when the thermostat opened for the first time after the coolant change). Your problem (or at least one of the contributing factors) sounds like a failed or failing radiator cap (not sealing properly so the cooling system can't run at its normal pressure). That's what's causing all of your venting and bubbling and boiling problems, and it also contributes to running hot.
  8. New VFR ideas

    Here's what I did to both of my 5th Gens when I got them: http://vfrworld.com/threads/refurbishing-my-99-5th-gen.52488/ I got the '99 5th Gen in December of 2016, it was the first of my two 5th Gen bikes (I keep one here in Denver Colorado and the other one is in Huntsville Alabama where I spend a lot of time). The thread I linked you to covers my refurbishment efforts on the '99 5th Gen. A year later, in the fall of 2017, I found an '01 5th Gen and did most of the same things to it. In the "refurbishing" thread you'll see pictures of the coolant O-rings.
  9. New VFR ideas

    That's a good list of preventive maintenance items, I guess. My recent experience with two low-miles 5th Gen bikes was that the long-term maintenance items hadn't been done either, things like the fork oil and the fork seals were original to the bike, and the valves had never been checked/adjusted. And when a bike gets to being 17+ years old at some point you need to do more than just flushing/filling the brakes. Instead you need to clean out the sludge that builds up in the brake reservoirs and inside the brakes themselves. Also inside the clutch master and slave. Yes, do the VFRness. And what's the status of the bike's thermostat? Is it original to the bike? The 5th Gen thermostat doesn't last forever, and when it fails it can do it in any mode: stuck full closed, stuck full open, only moving a little bit between to sticking points. And if you go for the thermostat, you might as well replace the O-rings in the coolant connections to the front and rear cylinder heads, and replace the short hoses that connect to them, if you don't they tend to start slow-leaking when you try to go cheap by reinstalling the old ones after you replace the thermostat.
  10. New to 5th GEN

    Isn't it great that there are low-miles, garaged, well taken care of bikes out there. In 2 years in Denver I found my '99 5th Gen with less than 19,000 miles and my '01 5th Gen with less than 12,000 miles.
  11. Changing Theromstat

    Here's what the O-rings looked like when I did a thermostat replacement on my '99 VFR800. They were very flat and crusty. They really didn't even look like O-rings at all as you can see in the second picture, sitting next to the new replacement O-rings. Lots of people seem to want to engage in the "wishful thinking" that says the rubber parts of an older motorcycle or car don't eventually have to be replaced. But these parts have a limited lifetime and the manufacturer (Honda in this case) sees them as "consumable items".
  12. Tires!

    Yes, that's what I'm going to do. Remember, I didn't bend Revzilla's arm up behind its back and force it to offer a price match program. (not related to your particular post, but to the overall situation: Revzilla just now got back to me again by email, this time the email was directly from the same guy who approved the price match for wee06, and he was offering to give me the price match on the tire. That's nice but that wasn't all the email said and a lot of the extra verbiage was so sad and corporate-whiner-ish I just can't bring myself to date-rape them with their own policy. So I'll be shopping elsewhere. Moving on, no long term hard feelings, that's just life in America, I wouldn't be where I am today if I was a stay-mad type of bro.)
  13. Tires!

    In my line of work I stand back and watch the business-my employer take losses on individual customers on a very regular basis. (I'm an airline pilot with a major U.S. airline, 20 years military and 18 years airline)
  14. Tires!

    You're kinda/maybe a bit delicate? What did I do to offend you? Did I make Revzilla implement a price match program?
  15. Tires!

    I followed Revzilla's price match request procedure exactly. In that request I included this copy link to the Rocky Mountain ATV-MC website: https://www.rockymountainatvmc.com/p/4607/54969/Bridgestone-Battlax-Sport-Touring-T30-EVO-Rear-Motorcycle-Tire Here's a copy of the email reply I got back from Revzilla (to clarify the name difference, Walter is my real first name but I've always gone by Greg because my father was also named Walter): Hi Walter, Thank you for submitting a Price Match request. At this point, Rocky Mountain ATV & MC is selling that Bridgestone Battlax Sport Touring T30 EVO Tire at far below our cost, so we cannot match the price on that. It may be best to take them up on their current pricing, as I think that is as low as you will ever see those units sold! Sorry for the letdown. If there is anything else we can help with please feel free to reach out. Safe riding, Taylor -- Taylor R. RevZilla.com 877-792-9455 Follow us @RevZilla! But isn't it great that after telling me to F-off "Taylor R." includes his obviously deeply felt concern that I should engage in "safe riding"? That makes it all better, right? (If you want to email him directly Taylor R.'s email address at Revzilla is taylorr@revzilla.com)

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