Hesitation, Sag, Stumble

Definition: Momentary lack of response as the accelerator is pushed down. Can occur at all car speeds. Usually most severe when first trying to make the car move, as from a stop sign. May cause the engine to stall if severe enough.
^ Perform careful visual check as described at start of Section B.
^ CHECK:

- Fuel pressure. See CHART A-7. Also
Check for water contaminated fuel.
- Air leaks at air duct between MAF Sensor and throttle body.
- Spark plugs for being fouled or faulty wiring.
- PROM number. Also check Service
Bulletins for latest PROM.
- TPS for binding or sticking. Voltage should increase at a steady rate as throttle is moved toward W.O.T.
- Ignition timing. See Emission Control Information label.
- Generator output voltage. Repair if less than 9 or more than 16 volts.
- HEI ground, circuit 453.
- Canister purge system for proper operation. See CHART C-3.
- EGR - See CHART C-7.

^ Perform injector balance test CHART C- 2A.