Misses Under Load
***UPDATED BY TSB #405489 DATED FEB. 20, 1989Mazda recommends the use of UNLEADED REGULAR gasoline only, in all vehicles not equipped with a turbocharger, unless otherwise specified. Do not use, or recommend for use, any higher octane fuels. Starting, idle, and driveability problems may result. See factory Technical Service Bulletin #405489, titled "USE OF REGULAR UNLEADED GASOLINE".
Definition: Steady pulsation or jerking that follows engine speed, usually more pronounced as engine load increases. The exhaust has a steady spitting sound at idle or low speed.
POSSIBLE CAUSE ACTION
Contaminated fuel Drain fuel tank and add clean gasoline
Restricted fuel filter/line Replace filter/repair restricted line
Incorrect fuel pressure Check Fuel Pressure Regulator
Plugged fuel injector(s). Check Fuel Injectors
Poor injector spray pattern