Anything abnormal, preferable when the problem re-occurs, not an easy task ...
As suggested by Stu, you might watch your voltage too, in case you got a disruption there.

If the car stalls, it might be from:
- electric disconnection - you might be able to catch the volt readings drop off
- starvation of fuel - you might catch the STFT going wild
- air disruption (not likely), you might see the MAF going wild (but first check the other 3 conditions for the MAF reading)
- TB sensor problem (- you might catch erratic behavior of the sensor at some point along the range

It will probably be process of being patient, but if the problem persists, you will see it in the readings somehow.

Feel free to ask for reference values where needed.

 

When I was reading the STFT the thing was going from 0.8 to 1.6 every 2 seconds later

 

That is correct.
The STFT is actually much faster, but I think there is a delay in the Bluetooth, or in the program to make it a bit more user friendly.

Couple of remarks:

1. The STFT is the immediate reaction of the ECU on a non perfect fuel-air mixture. You will see much bigger changes if you press the throttle, or go uphill.

2. The LTFT is more a balancer or an corrector, which is much slower, and corrects so to keep the STFT around zero. That is why you will need to check and report the LTFT's too.

3. Each bank has individual readouts for the exhaust analyses, so you will need to set the gauges for each bank.

4. I enclose the screens of my Torque Pro which are relevant for you, so you see what and how I am monitoring.
As you can see, the last 2 pages are gauges for the left and right bank.

 

Hi omgimali,

Just for clarification, I assume the temperature readings are in degrees Celsius? If they are in Fahrenheit, the engine coolant temperature should be in the range of 190F or so when the engine is at operating temperature.

Watch the MAF reading while revving the engine to and also while driving to see if it conforms to the chart Eric posted.

Also check the O2S readings. The upstream and downstream sensors will produce different readings, but the Bank 1 and Bank2 upstream sensors should behave similar to one another, and the two downstream sensors should behave similar to each other.

Cheers,

Don

 

Post #14 was good.

So, what are the LTFTs?

 

Really appreciate all the feedback. Ok so when driving I should floor it? or just go to the 2500rpm mark for the maf reading? and what specific things are needed? I am going to have a second person monitoring everything just to be safe on the road. And JagV8 on the app i did not spot a long term fuel trim, will find it, thank you.

 

Trims (LTFTs) hot engine, parked. Idle & 2500rpm.

 

Ok when I ordered my Obd-ii I also ordered a can of BG-44K. The reading were good and also the voltage. I added the BG 44k yesterday and let me tell you. It has restored the power and gained tons of hp back in the car.

 

That's incredible, especially that it would work so quickly. Did you use it in a full tank of gasoline or less? How many miles have you driven?

I don't know if you have ever looked up the ingredients of BG 44K, but it's about half naptha and half mineral spirits, both of which are common paint thinners available at any hardware store.

BG 44K Material Safety Data Sheet

Cheers,

Don

 

Maybe it was just bad fuel, compensated by the spirits of the BG44.

 

It smelt like paint thinner. I put it in half tank. and then put 15$ of fuel so a little above half but not full so its not too diluted. Then drove the car to Florence, SC. I had a doctors appointment at Florence (50 miles) so total about 112 miles. Gosh the car goes!

 

Yes the BG44K works wonders for me as well. I actually pick up a few MPG per tank with it.

 

how much of an improvent have you had with mpg @King Charles?

 

I use it every 3,500 miles which is about once yearly for this car. About 50-55 miles per tank(?!), I can't recall what it averaged out per gallon. I have the exact #'s written down in my garage, I'll post when I'm back out there tinkering lol.

We opened a big can of worms in another thread here about fuel additives, but I for one know BG has improved my MPG in every car I've ran it in.