|86-89 5.0L VIN F
||Oxygen sensor voltage stays between 0.35 and 0.55 volts for 60 seconds.
Engine was at normal operating temperature and had been running for
at least 2 minutes after start with a throttle angle above 5%.
||Coolant temperature sensor signal indicates a temperature of over
266° F for 3 seconds.
||Coolant temperature sensor signal indicates a temperature colder than
-38° F for 3 seconds.
||TPS voltage was above 2.5 volts for 3 seconds when the MAP sensor
signal showed manifold vacuum to be 15 pounds or more, or TPS was above
4.8 volts at anytime.
||TPS voltage was under 0.2 volts for 2 seconds when the engine was
||Manifold air temperature sensor signal showed an air temperature below
-22° F after the engine has been running for 5 minutes.
||When engine speed was between 1400 and 3600 RPM and throttle position
angle was less than 2% for at least 4 seconds.
||Manifold air temperature sensor signal showed an air temperature over
302° F for 2 seconds after the engine has been running for 2 minutes
and vehicle speed was greater than 5 MPH.
||EGR open command did not change the fuel mixture when the command
was given during off idle operation. EGR opening should cause the mixture
to be slightly richer because of the low oxygen content of exhaust gas.
||MAF sensor indicated an air flow of 45 gm/sec or more for 1 second
when TPS was less than 1/4 throttle and engine speed was under 2000
||MAF sensor indicated an air flow of 25 gm/sec or less for 1 second
when TPS was above 6% and engine speed was above 2300 RPM.
||Faulty or incorrect MEM-CAL.
||The EST signal did not change when the ECM applied bypass voltage
to the ignition module.
||The ECM did not detect a knock signal during near wide open throttle
operation with coolant temperature above 194° F or the knock signal
was present for 5 seconds or more during normal engine operation.
||Oxygen sensor voltage was under 0.2 volts for 50 seconds of closed
||Oxygen sensor voltage was over 0.7 volts for 50 seconds with a throttle
angle above 2%.
||ECM sees a battery voltage of more than 17.1 volts for 2 seconds.
||Fuel pump voltage was less than 2 volts for 1.5 seconds since the
last reference pulse was received.