Engine Idles Too Fast

*** UPDATED BY TSB #258707 DATED JULY 1987

*** UPDATED BY TSB #258901 DATED JULY 1989

Check the following:

1. Air leak at connecting flange which supplies air to shrouded injectors. [1]

2. Auxiliary air regulator hoses have cuts or holes [2]

3. Accelerator pedal or throttle cable binding

4. Throttle valve binding

5. Auxiliary air regulator faulty

6. Idle boost valve faulty

7. Air leaking past throttle valve

[1] Refer to TSB #258707 dated July 1987 for update

[2] Refer to TSB #258901 dated July 1989 for hose routing update

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.