compudude86
CEG'er
Alright, I had to do an engine swap after my original engine spun a bearing. I put another 2.5 in (would've done 3 if one was available in the yard but no luck), and threw on my 19-lb injectors, optimized and polished my TB, and put my CAI (short ram) back on and reattached my 2.5 inch exhaust and gutted precats.
I have a sniper special forces tuner, and used it to set my injectors to 19lb, turned off the lower o2 sensors, added in the catback exhaust, and the MAF with cold air intake option. It produced a base tune, which turned out too rich. I adjusted the low, mid, and high RPM fuel modifiers to pull out 0.2, to lean out my rich conditions. So far, no CELs, if I try to adjust the global fuel modifier for part throttle, dropping it to .9 (one point lean from middle) the car starts, but acts erratically in gear (car goes, when the pedal is let off, the idle jumps a bit, the transmission disengages, then reengages) so I put my global modifiers back to stock, and kept the -2 on all the rpm fuel modifiers.
I use FORscan and an elm adapter for watching my trims in oscilloscope mode. My LTFT is for the most part steady, going from -11(LTFT 1) -9 (LTFT2) or so in idle, to near zero in gear. It stays steady in-gear idle, fluctuating a bit with the gas pedal. The STFT however, goes all over the place, from -12 to somewhere around 30 (according to this program) to near middle on idle cruise, but from what I've read, STFTs don't really matter, its your LTFT that matters the most. So far, I haven't had a light trip, and my car seems smooth and doesn't reek like fuel with smoke puffs under acceleration, so I think I am ok.
As soon as I can afford it, I'm getting a wideband, but right now this project has me strapped for cash, so its trim tuning for me. I also think it is good to learn how the system works the hard way first, before going for the simple version, (N.A., no boost no juice of course). I am a certified as an engine builder, and I've learned more about engine and fuel management systems over the past week than I ever learned in a classroom.
The big question, is my car stable right now?
I have a sniper special forces tuner, and used it to set my injectors to 19lb, turned off the lower o2 sensors, added in the catback exhaust, and the MAF with cold air intake option. It produced a base tune, which turned out too rich. I adjusted the low, mid, and high RPM fuel modifiers to pull out 0.2, to lean out my rich conditions. So far, no CELs, if I try to adjust the global fuel modifier for part throttle, dropping it to .9 (one point lean from middle) the car starts, but acts erratically in gear (car goes, when the pedal is let off, the idle jumps a bit, the transmission disengages, then reengages) so I put my global modifiers back to stock, and kept the -2 on all the rpm fuel modifiers.
I use FORscan and an elm adapter for watching my trims in oscilloscope mode. My LTFT is for the most part steady, going from -11(LTFT 1) -9 (LTFT2) or so in idle, to near zero in gear. It stays steady in-gear idle, fluctuating a bit with the gas pedal. The STFT however, goes all over the place, from -12 to somewhere around 30 (according to this program) to near middle on idle cruise, but from what I've read, STFTs don't really matter, its your LTFT that matters the most. So far, I haven't had a light trip, and my car seems smooth and doesn't reek like fuel with smoke puffs under acceleration, so I think I am ok.
As soon as I can afford it, I'm getting a wideband, but right now this project has me strapped for cash, so its trim tuning for me. I also think it is good to learn how the system works the hard way first, before going for the simple version, (N.A., no boost no juice of course). I am a certified as an engine builder, and I've learned more about engine and fuel management systems over the past week than I ever learned in a classroom.
The big question, is my car stable right now?