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Page Title:
Engine Runs But Misses Different Cylinders |
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 ELECTRICAL
TROUBLESHOOTING
CAUSE
REMEDY
Engine Runs But Misses On One Cylinder
1. Defective spark plug
1. Clean and adjust or replace.
2. Distributor cap cracked or dirty; defective
2. Clean or replace distributor cap. Replace
lead
lead.
Engine Runs But Misses Different Cylinders
1. Points worn, dirty or out of adjustment
1. Clean, adjust or replace as necessary.
2. Defective condenser or loose on mounting
2. Tighten, replace if necessary.
3. Frayed insulation on pig tail from points
3. Replace pig tail.
to condenser; pig tail broken
4. Advance mechanism defective; bushings
4. Repair or replace distributor.
in distributor worn
5. Defective high tension wiring
5. Replace.
6. Weak coil
6. Replace.
7. Loose connections
7. Clean and tighten.
Engine Misses At High Speed
1. Weak distributor contact springs; point
1. Adjust spring tension and point gap. Re-
gap too wide
place as necessary.
2. Worn distributor shaft or bushings
2. Repair or replace distributor.
3. Advance mechanism sticking or worn
3. Repair or replace distributor.
Engine Lacks Power Or Overheats
1. Ignition timing off
1. Adjust timing.
2. Advance mechanisms defective
2. Adjust centrifugal advance. Replace
vacuum advance unit if defective.
Engine Backfires
1. Ignition timing off
1. Adjust timing.
2. Ignition crossfiring
2. Check high tension wiring, distributor cap
or rotor for leakage paths.
B-91
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