At the risk of ending up in the NEPRTs, I have a fuel economy question, but with an added twist (I think).
So, as long as I've been riding my '05 I've been getting 200-210 miles before the flashing fuel reserve on the gauge, and then I've run 50 or more miles into reserve and still only put ~ 6 gallons in. Right at 40-42 mpg like clockwork.
After bashing the lil' bambi this past fall, I had the shop do the TPS recall / replacement thing (finally) while the bike was in getting re-beautified. Since that time my fuel economy has dropped noticeably.
For example, on Saturday we took a very leisurely ride-about with the ionbeam's and FJReady doing some real touristing through the Massachusetts north shore (Gloucester, Rockport, etc.), where I expected to get phenomenal mileage, but I only netted ~36 mpg. Hell, that's what I got last year sporting around in West Virginia, by god! I've noticed this to be the case for the past several tanks, and not many have been explainable by heavy use of the right hand. Something seems fishy.
I am hesitant to declare that the observed difference is as a direct result of the TPS replacement. After all, it might just be a coincidental combination of the seasonal change in fuel mixture at the pump added to the bigger, cold weather windshield, etc. (hence the NEPRT risk) But the TPS replacement does seem to be correlated with the change, time wise.
Note that I do have a PCIII USB installed (O2 sensor disconnected) with a fairly aggressive fuel map to cure the "lean surging at steady cruise" problems that I had. I'm considering reconnecting the O2 sensor and running a zero map for a while as a test just to see if the old surging issue has been effected at all by the new TPS. Wouldn't that be a kick in the ***? If my original surging complaints were partly due to the TPS that I hesitated to get recalled? I would love if I could go back to closed loop mode and ditch the PCIII, but I'm betting the best I'll be able to do is to maybe switch to a less aggressive fuel map.
I'm just wondering:
1) if anyone else happened to notice any change in fueling / fuel economy when they had their TPS recall done. I know, for most it was a long time ago...
and
2) if it even makes sense that changing the TPS would/could cause the bike to run richer.
Clearly this would only be possible with the fuel injection in open loop mode. I know it goes in and out of closed loop mode (if/when the O2 is connected) depending on certain conditions, but my understanding of which exact conditions is not entirely clear. If anyone has a reference or cite that shows this in some detail it would be most appreciated. FWIW - I can not find this info in either the FSM or FJR Orientation guide.
So, as long as I've been riding my '05 I've been getting 200-210 miles before the flashing fuel reserve on the gauge, and then I've run 50 or more miles into reserve and still only put ~ 6 gallons in. Right at 40-42 mpg like clockwork.
After bashing the lil' bambi this past fall, I had the shop do the TPS recall / replacement thing (finally) while the bike was in getting re-beautified. Since that time my fuel economy has dropped noticeably.
For example, on Saturday we took a very leisurely ride-about with the ionbeam's and FJReady doing some real touristing through the Massachusetts north shore (Gloucester, Rockport, etc.), where I expected to get phenomenal mileage, but I only netted ~36 mpg. Hell, that's what I got last year sporting around in West Virginia, by god! I've noticed this to be the case for the past several tanks, and not many have been explainable by heavy use of the right hand. Something seems fishy.
I am hesitant to declare that the observed difference is as a direct result of the TPS replacement. After all, it might just be a coincidental combination of the seasonal change in fuel mixture at the pump added to the bigger, cold weather windshield, etc. (hence the NEPRT risk) But the TPS replacement does seem to be correlated with the change, time wise.
Note that I do have a PCIII USB installed (O2 sensor disconnected) with a fairly aggressive fuel map to cure the "lean surging at steady cruise" problems that I had. I'm considering reconnecting the O2 sensor and running a zero map for a while as a test just to see if the old surging issue has been effected at all by the new TPS. Wouldn't that be a kick in the ***? If my original surging complaints were partly due to the TPS that I hesitated to get recalled? I would love if I could go back to closed loop mode and ditch the PCIII, but I'm betting the best I'll be able to do is to maybe switch to a less aggressive fuel map.
I'm just wondering:
1) if anyone else happened to notice any change in fueling / fuel economy when they had their TPS recall done. I know, for most it was a long time ago...
and
2) if it even makes sense that changing the TPS would/could cause the bike to run richer.
Clearly this would only be possible with the fuel injection in open loop mode. I know it goes in and out of closed loop mode (if/when the O2 is connected) depending on certain conditions, but my understanding of which exact conditions is not entirely clear. If anyone has a reference or cite that shows this in some detail it would be most appreciated. FWIW - I can not find this info in either the FSM or FJR Orientation guide.
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