I have an 86T with a stock ECU, 450cc injectors, 4 bar fuel pressure, and a Greddy E-manage controlling it. I have had good luck with the E-manage so far. It is not the E-manage causing the problem.
I have used this same setup before with NO changes, but for some reason the car toggles between (from what I'm guessing) an open loop mode and a closed loop mode. I have no IAC, TPS, EGR, or O2 sensor for the stock ECU, but I have a wideband to monitor and tune. I can make a hard pull through a gear, but after a shift, it freaks out and runs lean. I have tried an ECU from another turbo car, and it didn't change anything. I swapped ROM chips from a turbo ECU into an NA ECU, and nothing changed.
Light throttle the car runs very lean. At idle it will either be 12:1-13-1 AFR, but it will switch to open loop and it bogs down a little and gets 15.5-1 or leaner.
What sensor would make the ECU change maps? Maybe a freak signal telling the ECU the TPS is closed? how can I keep it in closed loop mode all the time? I really need a nistune ECU ASAP. I'm sick of this piggyback.
I have used this same setup before with NO changes, but for some reason the car toggles between (from what I'm guessing) an open loop mode and a closed loop mode. I have no IAC, TPS, EGR, or O2 sensor for the stock ECU, but I have a wideband to monitor and tune. I can make a hard pull through a gear, but after a shift, it freaks out and runs lean. I have tried an ECU from another turbo car, and it didn't change anything. I swapped ROM chips from a turbo ECU into an NA ECU, and nothing changed.
Light throttle the car runs very lean. At idle it will either be 12:1-13-1 AFR, but it will switch to open loop and it bogs down a little and gets 15.5-1 or leaner.
What sensor would make the ECU change maps? Maybe a freak signal telling the ECU the TPS is closed? how can I keep it in closed loop mode all the time? I really need a nistune ECU ASAP. I'm sick of this piggyback.
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