For 1990-2009 cars

## Cuts Out, Misses Petrol

Checks | Action
--- | ---
DEFINITION: A surging or jerking that follows engine speed, usually more pronounced as the engine load increases.
Preliminary Checks | Refer to Important Preliminary Checks in Symptoms - Engine Controls .
Fuel System Checks |

• | Test for correct fuel system pressures. Refer to Fuel System Diagnosis .

• | Inspect for correct operation of the LPG fuel injectors. Refer to:

| Fuel Injector Balance Test with Special Tool

• | Test the lock-off valves / circuits for correct operation.

Ignition System Checks |

• | Inspect for fouled spark plugs.

| If fouled spark plugs are indicated the reason for the fouling must be found and corrected.

• | Test for faulty spark plug wires.

• | Test for an open ignition system ground.

Engine Mechanical Checks | Test for correct engine operation by checking for the following:

• | Correct engine compression

• | Correct engine valve timing

• | Worn or incorrect camshafts

• | Casting flash in the intake or exhaust manifold passages