Surges/Chuggles

Definition: Engine power variation under steady throttle or cruise. Feels like the vehicle speeds up and slows down with no change in the accelerator pedal.

^ Perform "Diagnostic Circuit Check - Calif."


^ Perform "System Performance Check - Calif".


^ Visual (Physical) Check:


- Vacuum hoses for splits, kinks and proper connections, as shown on Vehicle Emission Control Information label.


- Ignition wires for cracking, hardness, and proper connections, at both distributor cap and spark plugs.


- Wiring for proper connections, pinches and cuts.


- 4-Terminal EST connector and wires near spark plug wires.


^ Have driver read explanation of transmission converter clutch and A/C compressor operation in Owner's Manual.


^ Make sure hot air tube is connected to air cleaner.


^ Check proper operation of THERMAC.


^ Check for intermittent open, or short to ground in TCC circuit, term. "N" at ECM, to terminal "B" at transmission.

^ If ALCL tool is available, make sure RPM matches shop tach. See "Special Information" at end of this section.


^ Check for proper operation of EGR. See Chart C-7.


^ Check carburetor fuel inlet filter, replace if dirty or plugged.


^ Check carburetor float level using external float gage.


^ Test fuel pump capacity.


^ Remove spark plugs, check for cracks, wear, improper gap, burned electrodes or heavy deposits.


^ Check condition of distributor cap, rotor and spark plug wires.


^ Check for arcing to coil attaching screws in distributor cap.


^ Check for intermittent ground connection on integral ignition coil.


^ Poor or contaminated gasoline. Suggest owner try different brand.