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Nistech, Auto Service Technician
Category: Car
Satisfied Customers: 0
Experience:  ASE Master tech W/L1 Cert,Nissan Master Tech,Pa,Inspection and Emission Repair Tech Cert.
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Misfire Engine Code P0300 3.0 Liter Mazda MPV Van 1998

Customer Question

I have a 1998 mazda mpv 2wd van with a 3.0 liter v-6 singal overhead seting a misfire code P0300 ignition switch and distriutor have been only seems to set the check engine light after the engine has wormed up.can you please advise me on this.milage is 89821.thanks.
Submitted: 11 years ago.
Category: Car
Expert:  Nistech replied 11 years ago.
I would start with the basics.check the spark plugs and ignition wires.the ignition switch should have nothing to do with a misfire code.The spark plugs should be removed(keeping track of which cylinder they came from)check condition of plugs to see if there is any oil build up or damage to plugs,or if they are just worn out.also check the plug wires for damage,or spots that appear to be burnt thru.When replacing ignition components,don't look for the cheapest parts.OE parts should always be considered if not to pricey.I have replaced many brand new aftermarket ignition parts that didn't work on japanese cars.Good luck.