Hey fellas, could any DFI gurus please chime in on this
Say you had a late model fuel injected fly by wire v-twin 1700 stock bike, with stock exhaust, no oxygen sensors from the factory, evap canister equipped with separator, secondary air injection crap, with a TPS, MAP sensor - so basically the usual late model stuff. And then one day you find that the avg gas consumption started to suck royally with the proper tire pressure, good spark plugs, clean air filter and no error codes from ECU whatsoever (sensor related). The spark plug audible clicking test has been performed and they audibly click indicating open/close. Fuel pressure has been checked and while the OEM recommendation is 43 psi at idle, it shows 44 psi at idle, so pretty close, could be the old gauge. The bike has no black, brown, or white smoke coming out the pipes neither at idle nor at applied throttle, but the fumes do somewhat smell different, it pops on deceleration and clearly consumes much more gas then it used to. So if it took 150-160 miles to empty almost a 5 gallon tank before, it now does so within 40 miles. If it was either of the sensors, the ECU wouldef thrown a code. IS this assumption incorrect in general? I went on randomly disconnecting various sensors and the error codes started popping up. Could 1-1.5 psi of this possible extra fuel pressure push more fuel through injectors then required and thus use up so much gas? I don't see how, but could the damaged evap canister with a separator somehow affect this kind of undesirable behavior? Is it evaoprating somewhere? There no fuel smell and no leaks anywhere. The spark plugs have brownish shade to them. This is quite a dilemma ::010::
Say you had a late model fuel injected fly by wire v-twin 1700 stock bike, with stock exhaust, no oxygen sensors from the factory, evap canister equipped with separator, secondary air injection crap, with a TPS, MAP sensor - so basically the usual late model stuff. And then one day you find that the avg gas consumption started to suck royally with the proper tire pressure, good spark plugs, clean air filter and no error codes from ECU whatsoever (sensor related). The spark plug audible clicking test has been performed and they audibly click indicating open/close. Fuel pressure has been checked and while the OEM recommendation is 43 psi at idle, it shows 44 psi at idle, so pretty close, could be the old gauge. The bike has no black, brown, or white smoke coming out the pipes neither at idle nor at applied throttle, but the fumes do somewhat smell different, it pops on deceleration and clearly consumes much more gas then it used to. So if it took 150-160 miles to empty almost a 5 gallon tank before, it now does so within 40 miles. If it was either of the sensors, the ECU wouldef thrown a code. IS this assumption incorrect in general? I went on randomly disconnecting various sensors and the error codes started popping up. Could 1-1.5 psi of this possible extra fuel pressure push more fuel through injectors then required and thus use up so much gas? I don't see how, but could the damaged evap canister with a separator somehow affect this kind of undesirable behavior? Is it evaoprating somewhere? There no fuel smell and no leaks anywhere. The spark plugs have brownish shade to them. This is quite a dilemma ::010::