MPI tuning
- Thread starter Jeph
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Well i've finally got my car tuned fairly well. Do you think by changing the sensor it will make my car more tune friendly?
On titanium 99's car did you still have to pull so much fuel after installing the new sensor? Also did his car throw a cel or not? Mine hasn't so thats why I am asking.
On titanium 99's car did you still have to pull so much fuel after installing the new sensor? Also did his car throw a cel or not? Mine hasn't so thats why I am asking.
apocman said:
strangest thing on Ti-99 car. after fixing the o2 sensor the car afr's are much more stable. I only got a few minutes to tinker with it, but it didn't need extra fuel at 10psi, until he was WOT for a while then he would begin to lean. I have had him running a zero map to get the ECU set to non-tweaking so i could start with a clean slate. He holds perfect AFR under boost, he is a little lean around the first few psi, but then go real rich for a very brief second then goes to a nice 11.9-12.6 or so... And I don't even have his TM on at all....
I need more time to tune his car and then work the TM in so he doesn't get bucking....
I am absolutly amazed how well his cars afr's now are after fixing the o2, before it would go super lean or pig rich with no inbetween and now nice stable good afr's. I can't wait until we get to actually fine tune his car... The car even acts more aggressive, but yet very smooth... really nice ....
I need more time to tune his car and then work the TM in so he doesn't get bucking....
I am absolutly amazed how well his cars afr's now are after fixing the o2, before it would go super lean or pig rich with no inbetween and now nice stable good afr's. I can't wait until we get to actually fine tune his car... The car even acts more aggressive, but yet very smooth... really nice ....
gboromsp said:
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Well one, the mileage on the O2 was pretty high. He was also foulling plugs that night before the mpi went in, so it is possilbe fuel caked that first O2 and showed less fuel because it got covered. Since it reads lean, it dumps WAY more fuel to be safe.
That is my take on it at least.
That is my take on it at least.
LinuxRacr said:
So I talked to Nick and you can hook the WBO2 up if it has a 0-1v output. It will require wiring changes though. You would more them likely have to add a resistor and reconfigure the wiring to get it to work. A bit of work, and since I have not done this, I can't really explain unless I do it myself. My O2 reads almost perfect, so I don't really want to mess with it. If only your car was still here Jeph! I have another local guy that may be interested, but he needs to get a WBO2 first.
wicked said:
The attachment is a datalog if it has a .raw extension. Can you try to playback the .raw file? Put it in you're MPI_TUNER folder, then play it back if you can. When the playback is done, go to the file menu and save it. It will save the map it gives you on the datalog.
Titanium-99
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- 2007 Diamond Graphite Infiniti G35 Coupe
Timm is it possible that a bad wastegate could make tuning kind of hard and also would a bad waste gate cause bad hesitation and bucking. you see me and richard have tuned the car and its light years better and faster but the tune seems very unstable but it only seems to do weird s*** under boost and that is what is leading me to think that my wastegate being bad is what is causing the problem now. I have a greddy profec B spec- II boost controller and i dont turn it on often but i am getting 15 sometimes 19 psi spikes on stock boost and other times its like the car goes into boost and its like the wastegate is opening and closing opening and closing. I dont know what do you think?
What is it doing in boost, leaning out or something? If your boost is not stable, then you can't really tune the correct amount of fuel. You need a stable boost to know how much fuel is needed. Can you give a bit more detail on what it does, or does not do in boost?
we have most of the tune done, but we had to cut it short and was not able to finish 1st & 2nd gear and never got to microtune the upper gears. he is running AFR between 11.6 and 12.9 or so. He is running stock boost and sometimes 10psi, but we are tuning the first map for stock psi and then will make a "B" map for 10psi... we need to fine tune the transition between the TM kicking on. We have most of it done with decent feel when kicking in and it really wants to go and AFR looks great. He still needs the extra injectors if he is going to run high boost becuase he will begin to lean out around 5500rpm if he stays in it for over 20seconds or so, the leaning out process is very slow and begins slowly to creep back up in AFR the longer he stays in it. If I remember correctly he is maxing out at 4.98v when he is doing this, so this leads me to beleive he needs the extra injectors...
Bigg Tim said:
mazdaspeed75
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- 2003.5 mazdaspeed
g
YES YES run those extra injectors and get the duty cycle down on the stockers and get mad backfires when it hits the tm and yuo fly like a eagle eagle .
YES YES run those extra injectors and get the duty cycle down on the stockers and get mad backfires when it hits the tm and yuo fly like a eagle eagle .
mazdaspeed75
ZOOM ZOOM BOOM BOOM CLUB
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- 2003.5 mazdaspeed
n
well i think its a good idea to use the extra injectors to cut down on how hard the stockers work hince the duty cycle and the turbo module hits hard for me when its cold and backfires like a mofo then i fly likea eagle . Iam retard i know hahahahah
well i think its a good idea to use the extra injectors to cut down on how hard the stockers work hince the duty cycle and the turbo module hits hard for me when its cold and backfires like a mofo then i fly likea eagle . Iam retard i know hahahahah
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