Yes the O2's are supposed to "switch" from high to low like that when the PCM is in closed-loop operation. And it takes a few seconds from startup before they begin to work (you can see that in the...
Type: Posts; User: Mr. P.; Keyword(s):
Yes the O2's are supposed to "switch" from high to low like that when the PCM is in closed-loop operation. And it takes a few seconds from startup before they begin to work (you can see that in the...
I'm envious that you have no KR!
You short-changed your combo; according to your log, when you got to 5300-RPM you began backing your foot out of the throttle hence reducing MAP - in other words,...
I view the O2 sensors as a Delphi "workaround", or add-on.
The O2 sensors DO NOT have any DIRECT bearing on fueling calculations; if the PCM calibration/tune is perfect, you don't need O2...
Elaborating on everything Joecar said -
In forced-induction applications, you'll learn that ultimatelty it's all about the capability of the fuel you choose to run; you are fuel-limited. Even...
Yup; but stock vehicles aren't trying to make >600 forced-induction hp!!! In other words, stock power outputs do not require the huge amounts of enrichment fuel needed to cool the combustion...
Not a bad strategy, that should get the car running at least reasonable enough to get it to the dyno.
- Steve :)
Okay then get some wideband action going, and then log using the PIDS in the AutoVE tutorial; or email Justin and see if he would be willing to send you a PID selection file for you to use with the...
In my truck (2003 Silverado SS) the 'perforated' ones are the fronts... just be sure you are using the correct sensor!
As you KNOW you are running 93-octane E0 gasoline, the stoich of 14.63 you...
Check the GM service manual for wiring system routing; you gotta be sure, there is only one (correct) way to wire the sensors!
What operating system is in the car's PCM?
Is the PCM tune in speed-density mode? If you are making over 8-psi boost I SERIOUSLY suggest you consider it.
I would make sure you are using an...
OK trying to help here:
The O2 sensor debacle - there is a big difference between front and rear O2 sensors, they ARE NOT interchangeable, even if you pull a Tim Tooltime Taylor and "rewire" them....
Several thoughts:
You are logging WAY too much stuff, a lot of PIDS there that are unneccessary.
In the second log, there are no misfires logged at all.
What injectors are you using,...
OK some thoughts for you to consider, that worked for me:
First I would change how you look at your VE table - top axis should be MAP kPa (metric), the numbers/data should be "grams/cylinder" (aka...
Here's a screenshot of what I am describing - the second purple trace (labeled TRANS RTD) moves exactly opposite/inverse to the SPARK PID. So this transmission torque reduction PID is retarding...
Okay - that's what I thought. However, each of my Torque Reduction tables is zero'd out (upshift, downshift, and abuse) and all this EST_XMSN_DMA activity is happening during cruise - so where then...
Hello Everyone, been a while I know - this last month I dusted-off EFILive and got back into tuning my truck, and am tackling spark timing issues/questions.... I am trying to dial-in my spark...
I would agree that is pretty hot (112* c = 234* f) but no hotter than my best friend's 2010 Z06, it's ECT is 230-ish. Is the engine always that hot, or just at low speeds? If the ECT is fine at...
slows10 - yes I incorporate a full shroud.
ChuckL - wow you don't have much room to work with, your radiator is only 24" wide?! Your approach is what I would have done, according to the spec...
Well it all depends, and I'm not sure. I need to go to my alternator folks (Alterstart) and get a brain-dump on these contemporary units. Also, the charging system changed in the trucks in...
Remember, the whole key is high pressure seeks low pressure - diagram it out:
Diagram of OE PCV system operating at idle:
http://www.allensrodeophotos.com/Steve/PCV/OEM-idle.gif
Diagram of OE...
Interesting. The observations you have posted are exactly what I have seen in my own truck, except I have never thought to actually run a tap with a VOM and see what the system voltage reading would...
What OS are you using?
Bad. Ass. :)
How the hell do you prevent belt slip?! I can't get a single TVS1900 to reliably hold a belt, let alone two Eatons LOL.
I had a missfire as you describe when I first installed...
Personally, if your MAP sensor is off only 3-tenths of a Kpa then I would run it, that's pretty close. What you are trying to avoid is gross errors in your MAP sensor readings, since it is one of...
Off topic -
Feedback please on the big crank in the LQ9, would you do it again? And what did you do to the 4L60, parts & tuning-wise, to make it live? Or did it?!
Mr. P. :)