| Author | Message | ||
     Glitch |
When the air and bike are hot. Over normal operating temp. Does the FI make the mixture richer? | ||
| Signguyxb12 |
is this a trick question? If the exiting gases are hotter then wouldn't the increased tempurature cause less 02 in the exhaust causing the FI to richen the mixture But if that is true then the motor would never ping in hot weather? | ||
| Ingemar |
I would think hot air means less oxygen in a volume of air. This will cause LESS fuel injected, all other thigs being equal. | ||
| Glitch |
is this a trick question? Not at all. Just trying to figure out what the FI does when the air temp sensor reads hot air is in the air box. | ||
| Fullpower |
hot= leaner mixture required. | ||
| Wyckedflesh |
Glitch when the ambiant temp is high, the bike tends to run lean. That is when the ambiant temp is 90F and up. | ||
| Fullpower |
that is why they run so good when hot. | ||
| Glitch |
I'm just trying to figure out why Jens puts the air temp sensor on the engine (hot) side of his heat shield. I was thinking cooler air is more gas, no air box is more air, why would you want it to run lean? | ||
| Ingemar |
that is why they run so good when hot. Everytime it's cold and preferably a tad misty, I think the bike runs noticably better than on a dry and hot day. Just my perception of things. No rocket science involved. | ||
| Dale |
Aircraft piston engines use an extra rich mixture at full power to help cool the motor. | ||
| Glitch |
Everytime it's cold and preferably a tad misty, I think the bike runs noticably better than on a dry and hot day. I have the same feeling. Maybe I'll put the sensor under my heat shield and see what happens. | ||
| Hogs |
okay guys help me out with this with regards to the air temp sensor, fuel boosters, and that FAMOUS pinging.. Now for the last week or so temps been say average 5 degs. cels. NOW NO PInging whatsoever.. none can load 4 or 5th gear down low rpms. just for a second of course not good BUT torques away and NO pinging before lately would ping from 3 rd. at 3200 etc.and at 4th well no GO throw it in fourth or 5 th at those rpms NOW cold and bike goes with out pinging.. sure seems to me even that the air is nice, cool and dense now and I am at sea level (same fuel etc. )its all due to temp. your thoughts??? | ||
| Hogs |
I also might add with these weather conditions now yes it may be a tad cool BUT this XB Rocks just like ya gave it a shot of NOS.. sorry for you guys down southhhhhhhhhh :-) | ||
| Fed |
Glitch i have the F.A.S.T. system . in mid summer (in connecticut) i had the sensor above the thermal blanket thinking it should get cooler air. it ran great but as temps got cooler i switched back to below the blanket.i think it's going to stay there . | ||
| Crashm1 |
Glitch, As air temp increases it gets thinner meaning less oxygen for a given volume of air, the IAT sensor relays this to the ECU which then decreases injector pulse width a wee bit. I have a X1 and haven't looked at the way a XB is laid out fuel system wise but on the automotive fuel systems I work on the manufacturers without fail put the IAT sensor in the intake stream as close to the air filter box as possible. I would move the IAT sensor as close to the air filter as I could and on the cool side of the heat blanket. The O2 sensor voltage drops as it gets hotter indicating a lean mixture and increases when it drops indicating a rich mix. | ||
| Ingemar |
Thanx for that explanation Crash. I wasn't sure about the effect the iat sensor had either below or above a heat blanket. But it makes sense though. Cooler air has more oxygen per volume so the ecm should compensate with a slighty richer mixture. Putting the sensor on the hot side would lean out the mixture, causing the engine to run even hotter. | ||
| Hogs |
So are there any electronic Wizzards out here that could throw a resister, or whatever one wd. do if possible to make the air sensor send a singal on the little cooler side or be adjustable just a thought maybe i`m way out in left field on this...??? | ||
| Glitch |
Well I went to SMHD&B this morning and got the TPS, timing, and the AFV checked and set. I figured it was time at almost 28thousand miles. New NGK plugs. Cleaned the K&N. Changed the oil. The timing was a bit off is all. Went for a ride. The IAT is in the same place as stock. It'll stay there. I still wonder why Jens says to put it under. Never was too clear as why. Thanks for spelling it out for me Crash. | ||
| Joele |
I read, in the owner's manual, that the engine skips a spark when the temperature gets to a certain point - the fuel then serves to cool the pistons more and help lower temp. Everyone uses at least 91 octane right? |
