What's your data refresh rate for the OBD adapter you are using?.

 

This ^^^

The cheaper the OBD II adapter, the slower it refreshes, it seems. The really good (expensive) ones refresh incredibly fast. The $25 dollar ones like mine refresh on once per second (I'm guessing) and this can be seen in the GPS and even OBD speed readings. Heck even in the RPM reading sometimes, when snapping the throttle quickly. It actually has a nostalgic feel to it, kind of like the old cable fed tachs and speedo's.

 

 

 

Although Blue Driver is marketed as a "professional" OBD2 scan tool, it isn't even close to what most mechanics would use in their own shops. The ones in the shops I've seen run anywhere from $1000 to $5000 dollars. Blue Driver seems to be a high-end consumer tool.

Also, it's not the refresh rate of the app itself, it's the read/refresh rate of the tool.

 

If you have a successful shop then you need a ton of electronics besides special tools. Not to mention good diagnostic skills /welding /cutting /electrical knowledge . Continuing education must be awesome plus a good spouse to do the book work .

 

i know what snap on and Ford vcm and genesis and even autoenginuity scan tools and software are as well as cheaper ones.. How about hp tuners software? Is that fast enough? That does the same thing. I forgot about that. My neighbor has the hp tuners software and I was going to tune my truck myself so I’m not ignorant. Not saying that you said I was but i am knowledgeable. I built the motor that is my truck now and also the transmission here recently and have pulled the front cover 3 time on old motor and 1 time on new so I’m not one of these people that just ask questions bc they have no idea what they are talking about

So there isn’t a signal wire that maybe runs to the obdii side for viewing and maybe one that is ran to the throttle body or pcm?

Or or is it all in one loop?

if it’s all in one loop than bluedriver and both elm327 and hp tuners are all junk,but if there the signal and control wires are different than it could be a problem.

also the argument of refresh rate doesn’t hold water bc I watch the scream and as I’m holding the rpms a little about idle and it starts misfiring the apps values will jump right after the mis so i do not believe it’s refresh rate. Also I see a lot of people using the forscan app with the elm327 and there’s don’t do it. Again the one I’m using now is was not the cheapest but not the most expensive. I don’t even know why the 1500 5000 dollar scanners were mentioned bc those plugs in don’t work with forscan so not sure why that was brought up.

Plus when I look at o2 and snap the throttle they go lean a split second after so why would that report any faster then the apps?

 

Have you tried a USB OBDII interface. Some of them can run at 500k baud - instead of 19.2k or maybe 38k for the faster Bluetooth. (Torque Pro displays PID read rate, and mine through Bluetooth only runs around 12 to maybe sometimes 18 PIDs / sec).

But what's more important. We are NOT reading the sensors or devices 'directly'. You are always going to be dependent on the rate the PCM processor is programmed to read a sensor (such as tps) and update the data it converts from its A/D converter and deposits it into the output port (PID) for your scanners later consumption.