TROUBLESHOOTING - 1C-790-823225--1 1096
Engine Cranks Over but Will
Not Start or Starts Hard
Important Information
1. First, determine which engine system is causing
the problem. To make an engine run, basic com-
ponents - fuel, spark (ignition), and compression
- are required. If all three components are pres-
ent, the engine should run. If any one of the three
are missing, weak, or arriving at the wrong time
the engine will not run.
2. Determine if there is fuel present by looking down
the carburetor venturi while actuating throttle.
There should be a stream of fuel coming out of
the accelerator pump nozzles if the carburetor
has fuel.
3. Check ignition system operation. Remove coil
wire from tower on distributor cap. Hold coil wire
near ground and check for spark while cranking
engine over. Repeat procedure with spark plug
wires. If there is spark at the spark plug wires, re-
move the spark plugs and make sure they are
correct type and heat range, and not fouled or
burned.
4. Run a compression check on engine to make
sure the engine is mechanically OK.
Thunderbolt IV (HEI) Ignition (No Spark)
Cause Special Information
Moisture on ignition components Distributor cap or spark plug wires arcing
Battery, electrical connections, damaged wiring
Ignition switch
Shift interrupter switch (Alpha One Models Only)
Shorted tachometer Disconnect tachometer and try again
Ignition timing
Spark plugs Fouled, burned, cracked porcelain
Spark plug wires Faulty insulation, broken wires
Cracked or dirty distributor cap
Faulty ignition components Check components
Engine synchronizer (if equipped) hooked up
series on purple ignition wire (dual engines only)
Synchronizers must be hooked up directly coil
terminal (parallel chute)
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