HARD TO START/STALLS AT IDLE SPEED/DOES NOT RUN SMOOTHLY.

Troubleshooting Malfunctions (Cent)

Table 2-3. Troubleshoothg

(Cont)

Malfunction

Test or Inspection

Corrective Action

ENGINE (CONT)

3. HARD TO START/STALLS AT IDLE SPEED/DOES NOT RUN SMOOTHLY.

Step 1. Check adjustment of exhaust valve clearances (para 19-2).

Adjust exhaust valve clearances (para 19-2).

TA357650

Step 2. Check for misfiring cylinders. Start engine. Hold injector follower (1) down with a

screwdriver to prevent operation of injector. If cylinder has been firing properly, cylinder

will miss with a noticeable change in sound and engine operation. If cylinder has been

misfiring, there will be no noticeable change. Check all cylinders and tag misfiring ones.

Remove tagged injectors (para 12-2).

Test and repair injectors (paras 12-3 and 12-4).

Step 3. Repeat check for misfiring cylinder(s).

If cylinder(s) still misfire, perform engine tune-up (para 19-2 through 19-9).

Step 4. Check engine compression (para 19-1 1). If compression values are not within allowable

limits, remove air box covers (para 3-5). Inspect compression rings through ports of cylinder

liners.

Replace damaged or broken compression rings (para 6-2 and 6-3).