Having problems with your Ford Cars & Trucks ?
Ford fiesta 2003 mis firing especially in low gear had new leads and fuel filter
Hi Robert, just finished reading the answers you've already received and your questions. Yes the split intake ducting can and probably will cause a bad misfire. The air flow sensor is, if memory serves correctly, in front of the damaged area. That means that the information concerning the volume of air fed into the combustion chambers will be incorrect. This in turn means the ECU is receiving the wrong information and causing an incorrect amount of fuel to be injected. Regards John
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