Tempo L4-140 2.3L CFI (1985)
^
Run the EEC-IV Self-Test as outlined in Code 11 Go to Step 2. Volume H of the Car/Truck Shop
Manual.
Other error codes
Diagnose/repair per
Volume H then go to Step 2.
2 TPS CHECK
^
Install Breakout Box. Voltage between ^ TPS voltage OK.
.85-.95V
Go to Step 3.
^
Engine at operating temperature.
^
Engine running at idle. Voltage less than ^ TPS out of range.
.85V or greater
^ Repair as
^
Monitor TPS voltage with DVOM, Pin 46 than .95V necessary. to Pin 47. ^ Recheck
for
concern.
3 ITS CHECK
^
Engine running at idle. 12V DC at idle ^ ITS OK.
1.0V or less with
Go to Step 4.
^
Monitor ITS voltage with a DVOM throttle open. Pin 28 to Pin 40.
^
Measure voltage at idle. Either voltage ^ Check ITS wiring/ out of range. connector.
^
Move throttle to open ITS circuit. ^ If wiring/connector
OK, replace ISC/ITS motor.
Other possible causes:
^
Sticking throttle cable/throttle shaft.
^
Bad TV linkage return spring.
^
Bent throttle tang.
Page 26
Erratic or High
Pinpoint
1
Idle Speeds
Test
TEST STEP
RESULT
ACTION TO TAKE
4 DISTRIBUTOR CAP AND ROTOR
^
Verify that distributor is equipped Yes ^ Replace the with the vented cap. processor per
the
application chart. Then continue with Step 2 of service procedure.
^
Verify the rotor is a single blade No ^ Refer to TSB type. 85-22-17.
^
Insure that the blade has a thin ^ Recheck for coating of dielectric grease. concern.
