slowcivic

so,OBD1 uberdata + VX WB o2 sensor = cheap wideband setup? or do you still need a controller?

please explain. pm

slowcivic

bump

willahlborn

No. The obd1 ecu does not have the circuitry to control the vx wb o2 sensor. You need a controller. If there was a cheaper way don't you think someone would have done it by now? :P If you're looking for a cheaper option, try the diy-wideband o2, which is reportedly a bitch to assemble.

robs99si

you can tune it with the stock o2 by reading the voltage it puts out with a digital voltmeter $18.00 at radio shack.
just hook up the green or white wire (i can't remember which one it was)to the positve cable on the voltmeter and the negative cable on the VM to a ground. then you let your car warm up and take it for a spin and record the readings. this link tells you the voltage to afr you should be tunning at. people will tell you it doesn't work cause the stock o2 isn't a wideband, that's BS it does work. i had my car tunned at a dyno w/vafc and i took the volt readings off the stock o2 sensor and they match the afr-volt scale that's on this link. this has been done for years but people over look it caause they want to see the afr not a voltage read out conversion, but it works
check out this link:
http://www.zeitronix.com/questions/O2questions.htm

slowcivic

he was saying that with uberdata it can accept wideband signal. so why does it not work again?

slowcivic

it can accept the signal but cannot decipher it? whats the deal?

Chris Harris

This is SO retarded for many reasons.

You mean to tell me that you can ACCURATELY tell the difference between .94 volts & .95 volts on a slow DVOM...when .01 volts is the difference of .5 ARFs? Nah....

Not to mention while you are tuning the ECU is still trying to trim the fuel using the values is sees coming from the stock 02...which will throw off what you think your DVOM is seeing.

Also, your stock narrowband is place so far down your exhaust that it takes a good 1/2 second or so to actually get a reading that happend a 1/2 second ago...hmmm.

Then your stock narrowband (that had been driven on for XXX,XXX miles) looses accuracy as it get used and as it reaches the extremes of the AFRs it can read.

For the last ------- time....NARROWBAND O2 sensors are only good at or very closely around STOICH (14.7 AFRs).

willahlborn

why do people insist on asking questions, and then when someone gives a concise answer, they say "no, you're wrong"... or "that can't be right, does anyone else know?"