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HEY GUYS THANKS FOR THE MAZDA PROTEGE 97 0400 MISSFIRE CODE INFORMATION. UNFORTUNATLY I DIDNT HAVE MUCH TOOLS I TOOK A CAVE MAN APPROACH AND STARTED THE CAR AND SLIGHTLY TAPPED AROUND THE EGR, EGR PORTS AND THROTTLE BODY WITH A HAMMER WHILE THE CAR WAS RUNNING. I DID THIS TO LOOSEN ANY GUNK OR RUST THAT MIGHT BE CLOGGIN IT OR STICKING IT. THEN I BOUGHT A 5 DOLLAR BOTTLE OF SUM CHEVRON FUEL INJECTOR CLEANER AND ADDED IT TO THE GAS. WHAT HAPPEN WAS I DRIVING A LONG DISTANCE AND BOOM I RAN OUT OF GAS LOL BEING CHEAP THEN THE CHECK ENGINE LIGHT CAME ON AND THE MECHANIC SAID 0400 MISSFIRE CODE I HAD NO TOOLS AND NO EXTRA MONEY JUST A LAPTOP AND A HAMMER. SYMPTOMS WHERE STALLING AT STOP LIGHTS ROUGH IDLEING AND LOSS OF POWER AFTER THE CAVE MAN TREATMENT I SHUT THE CAR OFF AT MY LOCAL GAS STATION AND WENT TO SLEEP PRESSTO CHANGEO NO MORE CHECK ENGINE LIGHT FOR NOW YOU GUYS HAVE BEEN REAL HELPFULL
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