Quote:
Originally Posted by blue62
Your MAF signal compared to the TPS signal looks normal to me.
So I believe you MAF is fine.
You say your fuel mileage is back up???
Improvements are good. Any idea what your MPG is currently???
Do you think the fuel mileage improvement is from changing the injectors???
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Hi blue62! I can't thank you enough for sticking through this with me.
Yes, fuel economy seems to have largely returned to earlier numbers. I do not have an absolute number, but I'd estimate it at about 20mpg (~75 miles per quarter tank). This is varied driving conditions while test driving. I can only attribute this change to the replacement of Bank 1 fuel injectors, because Bank 2 fuel injectors didn't seem to make much of a difference to engine performance or fuel economy. Regarding engine performance, most, if-not-all, of the cold-start idle weirdness has gone away.
I have no black smoke (rich condition) at idle, nor any soot on the tailpipes, and the exhaust does not smell of gasoline. The old O2 sensors had a mostly white-tan light coating, which seems normal. Also, my RKAT numbers for both banks have gone further negative to -3.5 since changing Bank 1 fuel injectors. Yet, I'm still only throwing code P1126.
I got a little fed up trying to decipher Durametric data, so I bought a bluetooth obd and android app to watch the new O2 sensors and the post-cat sensors (as well as STFT, this is before I figured out it's PID in Durametric). All four O2 sensors and the STFT values looked very much closer to the data from ScannerDanner's videos (flat line for the downstream O2 sensors and adaptation behavior from the upstream sensors) than anything I was able to plot from Durametric data. No conclusions drawn here, it's just the way it is. As I learn to use the Android app better, I will try to output data from there as well if you want a look.
This thread has gotten long, so I will post a roll-up (TLDR style) summary shortly to get a snapshot of the current situation and hopefully, something might jump out, because right now, I'm not sure where to go next. Thanks again!