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1999 Mazda Miata 10th Anniversary 1.8L Misfire, MIL Lamp on
Posted to Asian Driveability on 10/26/2004 11 Replies

This car came in about 2 months ago for an MIL issue. Found 2 codes PO300 and PO421. Inspected plugs and wires and found carbon track marks on number 2 wire. We replaced plugs and wires with OEM parts and found quite a few posts about bad converters in the arc...

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  Related Documents & Media  1999 Mazda Miata 10th Anniversary

 
Message Closed w/FIX

car Vehicle Data

1999 Mazda Miata 10th Anniversary

VIN JM1NB3537X
Engine1.8 L / 4 cyl / GAS
Trans6-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursCold

Trouble Codes

P0300Multiple Misfire Detected
P0421Catalytic Converter Efficiency (Bank 1)
Message Closed w/FIX

car Vehicle Data

1999 Mazda Miata 10th Anniversary

VIN JM1NB3537X
Engine1.8 L / 4 cyl / GAS
Trans6-speed Standard
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursCold

Trouble Codes

P0300Multiple Misfire Detected
P0421Catalytic Converter Efficiency (Bank 1)