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hey guys, I just installed my LC-1 wideband and the XD-16 gauge.. My question is, how in the heck can I do my readings?? I mean with the truck in idle the gauge reads 14.7 air/fuel ratio, but when I hit the gas, that thing goes crazy and it is just to fast to be able to read it... how does it work? or how can I do my readings to check that everything is doing fine during a race?? cause I will be spraying 75-150hp and I want this thing to do what I bought it for.. to keep me out of trouble..
Hey, i answered your other post, hope that helps.
but here is something to go off.
the wideband sensor has to be hot/warmed before it will start reading correctly, so the best way is to turn the key on and let it get nice and hot before you start trying to read the a/f ratio.
when you start the truck, the pcm is in OPEN loop, so the a/f ratio is going to be on the rich side when cold and below 140degs or so, and for the first 30secs or so. that is completely normal and it's like choking a carb engine, it has to run on the rich side until you get going.
once it's warm, the pcm will enter CLOSED loop, the ltrims will start working and the o2's will start giving feedback to the pcm for a/f ratio adjustment.
you will then notice that a/f ratio is going to try and reach 14.7 or so. this is normal. also, a wideband reads better with a constant stream of exhaust going across it, so at idle, don't be bothered that the reading is bouncing all over the place from 13 to 16, that is normal.
once you're cruising, the a/f ratio will be a little more consistent.
there is a thing called DFCO, the pcm will cut fuel under decel and the wb will read LEAN or off the chart, that is normal.
under wot, a/f ratio will read around 12.5 to 13.0, this is normal and acceptable.
also, don't be fooled by one reading and expect it to be the same the next, nothing against what you bought, but i hate the lc-1, i have several laying around here and hate them, they are always all over the place and a pita to use, well sometimes, and i hate calibrating them, hahaha, that is just me though.
later,
allen
well what wideband do u suggest Alan?
im already not liking my LC-1...it isnt consistent at all!
I used to like the AEM, cause they were cheap but the sensor isn't replaceable according to AEM.Quote:
Originally Posted by banker099
so, we've been using the PLX for some time now, and they work great.
plus, no calibration and sensor are replaceable.
i use this for local tunes, it's my portable wb, it's a nice piece!
PLX Devices Inc. - Multi Gauges, Single Gauges, Sensor Modules, Wideband Air Fuel Ratio, Data Logging, Fuel Saving / Scan Tools
and of course the FAST wb unit, with dual inputs if i need it.
do u sell those??
im gonna recalibrate mine this afternoon, its bouncing all over the place right now, between 13-16, and is reading real high, under normal driving, this all started when it rained real hard the other day, still drives fine tho...ill recalibrate it and go from there i guess
ya, we have them, the a/f ratio module is on back order though.
ya, that's why i quite using the lc1, mine started to do the same thing.
i have barley 1000 miles, if that on this gauge/sensor, thats really depressing, haha, i hope the recalibration works...
What sensors do the autometer analog afr gauge use?
one of these days i should probably buy an A/F gauge :lol:
can you use the innovate db gauge, or say auto meter cobalt air fuel gauge with another wide band controller?
i finally got mine lined out i think, i cant believe u dont have a wideband G!!!
Might be a good idea there ginger. I think I may want to get one one of these days too.Quote:
Originally Posted by LamboDoNoMo
:lol: thats what i always hear, let em hang man :lol:Quote:
Originally Posted by banker099
Mine use to read all over the place until I adjusted the output rate to 1/6th of a second. Now it stays fairly steady. The LC-1's can read fast enough to pick up individual exhaust pulses and show lean and rich spikes.
Another issue you might be seeing is the o2 sensors cross counting. The factory sensors only read around 14.7 so the factory ecm makes the afr go rich to lean at a fast rate. This allows it to cross the 14.7 point several times a second in order to adjust fuel trims. Your LC-1 may be picking up on this also.
how do u adjust how fast it takes its readings?Quote:
Originally Posted by country_3030
It comes with a serial cable and the LM Programmer on the CD for it. The instructions for the procedure are also on the CD.