Engine Misses or Hesitates Under Load
*** UPDATED BY TSB #289002 DATED MARCH 1990Check the following:
1. Spark plug angle connectors [1]
2. Air flow sensor flap binding or faulty [2]
3. Intake air preheating system faulty [3]
4. Vacuum (intake air) leak
5. Low fuel pressure. Refer to Fuel System Pressure Test.
[1] Refer to TSB #289002 for parts update
[2] For testing procedure Computers and Control Systems
[3] For testing procedure, see Powertrain Management/Emission Control Systems/Thermostatic Air Cleaner. Thermostatic Air Cleaner
NOTE: After each symptom, the sub-system that could be the source of the symptom are listed and should be checked in the order they are listed, beginning with #1.