Thread: Some of my Scans

According to the DHP Tuning Bible aka Jerry's Notebook....

Please note, we are always going for trims lightly in the negatives or 0, but never into the positives. This means that the PCM is adding fuel because our settings are making it go too lean. Better to be slightly rich than lean.

Source: Tuning Your MAF Table - OpenTuner Notebook

Your LFT's are Negative Around -4 to -5 during your cruise. What makes you think you need to add fuel?

I use a table modifier prog... that basically removes all decel fuel cells... and averages all the fuel trims (at least that is how I have mine set). Looking at the output on this file (I emailed it to you with SUBJ line: More BS) ... my Lower MAF hz (im sorry i put higher on my previous post) are + when my higher hz range is -. Using the logic from the tuner notebook... I want trims slightly -. I can post it in the thread if anyone wants me too.

I see Negative LFT's (Cruise.) Going off your last scan. Do not take into consideration the Plus 8 you see on deceleration or the Plus 3 to 6 you see at idle

I don't care about idle and decel fuel cells.

So, this isn't meant to point fingers or say someone is wrong.. or compare e-cocks. This is how I learned to tune... whether its right or wrong, I definitely want to know. I enjoy talking about tuning, and finding out what others are doing. I am no pro by any means.... just seeking knowledge

/hug

Originally Posted by Lawngoose

According to the DHP Tuning Bible aka Jerry's Notebook....


Source: Tuning Your MAF Table - OpenTuner Notebook

I disagree with that statement. Id rather have a PCM adding fuel blindly off a narrowband readout then pulling fuel blindly. Esp under WOT conditions

Originally Posted by Lawngoose

I use a table modifier prog... that basically removes all decel fuel cells... and averages all the fuel trims (at least that is how I have mine set). Looking at the output on this file (I emailed it to you with SUBJ line: More BS) ... my Lower MAF hz (im sorry i put higher on my previous post) are + when my higher hz range is -. Using the logic from the tuner notebook... I want trims slightly -. I can post it in the thread if anyone wants me too.

You would know better of what your trims are doing. I was looking from just two scans. The goal is +3 to -3. Cruise IMO doesn't make a difference of plus or minus if your in that range LFT's should lock at 0 WOT. WOT is another story. A average of trims isnt a good idea IMO as you can be lean in one section of the HZ and rich in the other. But as I said I have no experience with Tiny tuner/table mod program. Alot of people use them. I just use histograms

Originally Posted by Lawngoose

I don't care about idle and decel fuel cells.

Thats what I was saying. Decel cells do not effect PE locking

Originally Posted by Lawngoose

So, this isn't meant to point fingers or say someone is wrong.. or compare e-cocks. This is how I learned to tune... whether its right or wrong, I definitely want to know. I enjoy talking about tuning, and finding out what others are doing. I am no pro by any means.... just seeking knowledge

Good because mines HUGE!.