Random misfire after warm up and re start
11-26-2014, 07:49 AM
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Random misfire after warm up and re start
All right guys....I have gone an entire month trying to find the cause of this misfire. The car starts runs fine as long as I drive it. as soon as I shut the car off and start it again the misfire starts and the CEL starts blinking due to the misfire. It sounds like a bad coil (Changed two already) or plugs but have changed the plugs even if they looked good. The coils seem to be working since all plugs look the same. I checked wiring for ground issues and checked for vacuum leaks. To give a brief history, it all began when I accidentally put some 87 octane (3Gal) fuel. To correct it I poured 114 oct booster and filled the tank with 93 oct. Shortly after that is when it all started. I was wondering if the octane booster damaged the O2 sensor...I'm running a Powerlab single turbo that uses the upstream driver side O2 sensor for ECU fuel adjustments. The only DTC I have is the 0300 code that is been present since the turbo install. Im considering going to the Nissan dealership and get a diag done but I want to exhaust my option before going that route. Any suggestions or input appreciated
Last edited by ffwturboZ; 11-26-2014 at 07:50 AM.
11-26-2014, 12:43 PM
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Yes..But its random and I would believe that a bad fuel injector would cause the misfire all the time. I did check the injector connectors since I have aftermarket injectors and they all seem to be fine. The plugs did not show signs of fuel starvation.
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