We just installed a brand new engine in our 1986 T-Type. Since the installation, the ECM does not read the TPS sensor as it changes (Scanmaster displays idle setting of .42, even at WOT - engine off), the O2 sensor is lazy and generally reads lean at idle and cruise, and O2 cross counts are also lazy or unchanging. We've replaced all sensors, the chip, and the ECM. We've confirmed that the TPS is producing the proper output (with a voltmeter), and confirmed that the grounds at the back of the passenger side cylinder head are properly attached.
What do the TPS and O2 sensor circuits have in common? What could cause this problem? Please help!
What do the TPS and O2 sensor circuits have in common? What could cause this problem? Please help!