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The mkiv Supra Owners Club

Misfire problem help please


Paul372

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Hi, i was out in the supe (jap spec tt) today all was fine, i parked up came back started the supe and it sounded like it was missing the exhaust tone changed, i drove it down the road and it was holding back had no power like there was a blockage or something Sluttering, i ve replaced the plugs and coil pack clips were replace a little while ago and its had a new 02 sensor, could it be coil packs what else can i check for thanks

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Hi, i was out in the supe (jap spec tt) today all was fine, i parked up came back started the supe and it sounded like it was missing the exhaust tone changed, i drove it down the road and it was holding back had no power like there was a blockage or something Sluttering, i ve replaced the plugs and coil pack clips were replace a little while ago and its had a new 02 sensor, could it be coil packs what else can i check for thanks

 

Just a thought, was it raining when you parked up? If it was, do you have the bonnet scoop undertray fitted?

 

Does it sound like the engine is missing? Is it happening at a particular rpm or all the time? Can you feel/hear the turbos coming online?

 

If it is misfiring, the first thing I'd do would be to remove the spark plugs, if one plug is obviously blacker than the others, this would highlight a problem with a particular plug/coil pack clip/coil pack.

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Hi Nic, no it wasn't rainning but i do have a uk spec bonnet fitted but it has all the under tray etc fitted to it, it defo sounds like a engine misfire you can hear the turbo's spoolling up nice they seem to be fine, it doesn't happened at a particular rpm it's all the time but occasionally the supe goes back running fine for alittle while then goes back to misfiring again, i'll take all the plugs ouit and take another look, thanks Nic

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