1953-1960 Classic Car Engines Troubleshooting Guide: Engine Misfires When Car is Accelerated

The text for this Guide originally appeared in the 23rd edition of Motor's Repair Manual, published in 1960 and copyrighted by Motor Information Systems, and is used with their permission.

Things to Look For:

If the engine misses when car is accelerated but does not miss when idling the reason is that the spark plugs stop firing because of increased compression pressure caused by:

1. Weak spark.
2. Plug gaps too wide.
3. Plug fouled or damp.
4. Plug porcelain below par.

The Complete Guide to Troubleshooting 1953-1960 Era American Classic Car Engines