stevieturbo wrote:Why on earth would you even consider just increasing the entire map by any percentage, let alone a crazy 50% ????
Simple: I want to see if it does something!
As I explained on the other forum a while back, my engine has something weird with DTA (did not do that with SDS system previously), when I tap the pedal it leans out half a sec and then richens half a second and then comes back to normal. Even if I turn on transients and use values like 50-60-70% it does not reduce the leanness in the first half of a second but it does richens even more the richness for the next half a second.
So becaue this is really really weird (like a delay nothing seems to fix), many people told me it's cuz my map does not have enough fuel in the cells I go through when I tap the pedal. So because it's too hard to check on highway by myself alone, I thought Ok, if it's really the base map the problem, then if I increase the entire map by 40% and I tap on the pedal, if people are right by saying it's the cells I run through that are too lean, well it should then not be too lean, cuz I added 40% everywhere and I did everywhere cuz I don't know which cells I will hit when I'll do the test.
Do you see my point? This is a "test" and nothing else for the sole purpose of understanding that stupid engine of mine for which no one on earth so far had a single clue why my engine behaves that weird way (described above). If my entire map is too rich, I should not hit 20AFR if I tap the pedal. That is what I want to test. If it works, then it means I can figure it out on my normal map by playing with fuel when I'll be ready to.
The thing is I don't trust it is only fuel. I think there is something else either DTA or mechanical. Therefore, a rich map will most probably still get those lean spots when I tap the pedal. That is what I want to see. Cuz if it's the case, what's the point of tuning transients if they can't fix the issue?
That's where I am going. And as I said, since it's a test and not tuning, I will simply tap on it once or twice and then revert back by -28.6% (that is the % you need to remove when you added 40% to get back to original fuel values) to get my normal map. This way I will see what happens and be able to know if it's fuel or something else. Very simple and it should tell me a lot.
I would be so stupid to spend hours trying to tune transients if no matter what I do cannot fix the problem cuz it's something else.
But I could not try that test yet. I got screwed today!!!!!!! I think the car did not like not being used for 1.5 weeks and when I started it, the cam sensor signal was erratic, shutting down the engine every time I was starting it. My RPM in-dash needle was also off by 100-150rpm. Uh??!?? The only thing I could do was to run batch. Fuel values are not the same in batch mode, for me they are 10-12% higher in average (but not the same everywhere). So I had to add between 10-15% of fuel everywhere, which screwed up my FCM!!! I realized that on the road while it was too late and my last backup of FCM table is outdated. I managed to get fuel values that required about less than 5% corrections at steady TPS, but it certainly changed all what the FCM learned. So I will have to drive for a lot more weeks to get a better map, probably still a couple of months.
Then I let the car turned off and restarted it at 62C water and miracle! The cam sensor signal was flawless! And the in-dash rpm needle was spot on!! What the hell?? Oh well.
just in case they fight!
inlet temp sensor.