Finally, I figure out how to do diag in a free way
Few days ago, I didn’t know cellphone can do the diag on car until I heard that from someone in forum, then I keep asking how is that going, and today I think I may be totally know how it works, and What surprises me most is that the android app torque is free, which I used to be told the price is $25.
Now if you don’t mind, let me show you how it work with the adapter elm327(I am new, please don’t judge me):

There's an app in the Google Play store called Torque. There's a free and a paid version. Install the app on you android or symbian, and then connect to the elm327 bluetooth OBDII reader(3 .pdf may help) and read fault codes, clear them, and show RPM and other stuff. It's pretty cool and it works.
Anyway, I really like to do this stuff on my phone, convenient

 

Hehe, a little behind the times aren't ya?

I've been using this for a long time. It works great.
Plus, it makes you look like a genius to noobs.

I wouldn't get the cheapest chinese adapter. Some don't work so well.

 

Question to the people that have/use this. Does this have any advantages compared to regular OBDII scanner? And if yes, what are they?

 

Live data from I can see.

 

Been using this on my Max while now, works pretty good.

 

Any suggestions on a good one to buy? I'm all over this.

 

Smells like spam...meh oh well, auto parts stores do the diagnostic for free

 

how u figure???........

 

so i just downloaded the free app and it has a air/fuel gauge i can add...... noob question... can i use this as a wideband of some sort????.... if so im def buying lol

 

^^^
No and yes...
It will not be as accurate but it will show what the voltage is for the narrow band sensor.
you can take that voltage and with some fun math arive at a rough a/f ratio... but it will not sample nearly as well as a true wide band so its more for a ball park figure then serious tunning

I dont recall the formula but i did find this...

0.97V - 12.1:1
0.88V - 12.7:1
0.78V - 13.2:1
0.69V - 13.8:1
0.59V - 14.4:1
0.49V - 14.9:1
0.39V - 15.4:1
0.30V - 16.0:1
0.20V - 16.5:1
0.10V - 17.1:1

 

Even with my obdii I can monitor live data. Of course it's not wireless, but I don't care.
You can only monitor a wideband signal with a wideband sensor and gauge. The car ecu doesn't see this. I think PLX has a kit that also interacts wirelessly with their downloadable app for phones, but they are costly IMO.
I prefer my $120 wired scanner. No connection issues and is easy to use. Will last a long time.

 

why? it said that real store would like to get the cheapest one from china, and then sell it to you guys

 

lol that can help.... Some tuning is better than no tuning lol... Based off that I just gotta keep it in the .70's

 

as far as im concerned, that would be fast response more car models and cheaper...
want some special? read and program just $35 ...that is ok

 

I'm talking about ebay. There's different chips used in some of them and the compatibility of the uber cheap ones may not be that hot. Maybe this has changed, but there was a lot of talk about it when I bought mine including a warning by the app dev.

I would just google around and see what people are using (different than when I bought mine). OP has a pic of the one he's using. It works for him, so I guess it's a safe bet. It's 20 bucks on ebay and ships from US.