98 galant, 2.4 drivability issues. The car had a code for a TPS problem, replaced TPS. No more codes. Car starts and idles fine. Slowly increasing idle speed to 1600 is fine. After 1600 engine begins to run at a high, low, high, low speed. Engine speed cannot be smoothly held nor regulated beyond 1600 rpm. You can rev motor to at least 5000 if throttle is snapped open, but any constant rpm beyond 1600 cannot be maintained. I tried two used MAFs, and today I tried a new one. The results from all three were no improvements. It still seems like a MAF issue to me, but I guess not. The battery was disconnected for longer than ten mins. before trying each of the MAFs. My scanner is not really helping with any ideas. I do not think this is a fuel issue. Distributor or PCM next. Any ideas?
Was the TPS installed correctly, u have to make sure the ECU 5volts is ok (4.8-5.2) then adjust the first channel to the correct setting, then check the second channel is within limits. you also check smoothness of change of resistance of the TPS while you slowly move it by hand from close to full open, maybe the sensor is bad
Trottle sensor, temp sensor ,ecu...
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