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Hi Guys/Gals,

i have a BNR34 RB26DETT, just recently my work machanic serviced my car and he put in NGK Platinum spark plugs after that the car started to misfire bad :D . i put NGK Iridium plugs back in and the misfire is a little better but it's still there. now it's getting worse and worse the car is splattering and when i accelertate car just splaters and doesn't go anywhere. would a retune fix this or is it deeper than that. any help and suggestion would be greatly appriciated.

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Coppers for the win at around .8mm gap

Check all the plugs are clicked in

Check that the contacters in the bottom of the coil packs are still there i had a set floating around the floor of my car put them in and was missing found the contacter on the floor put in back in and is good you will have to remove the rubber boot to find them also while your there give them a clean with some fine emeroy paper

If that all fails swap over coils and air flow meters only do one at a time to find out which is f**ked

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Bit early for R34 coil packs to be failing.

Does it have an aftermarket ecu. If so id say it needs a retune and some fresh copper plugs.

Two words Race Pace

Racepace is were i got my stage1 done and were i normally get my car serviced. the 1 time i didn't take it there this happens. anywayz tried to book but Ben said he's busy for 2 weeks.

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so is it constantly or just under boost?

constant. when engine is cold it's misfire is really really bad but once it's working temp it's kind of ok (but still there). must be foul on plugs until high temp burns most of it away hence ok when warm. what do u guys/gals think?

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yeah loose plug then, check the coilpack loom and all plugs, even unplug and replug them all

if the coils were old and tired it would misfire on boost but be ok for normal load

if the gap was wrong it would be fine for normal load only on boost it would misfire

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ok...thats the answer i been waiting for.....what i reckon is wrong is that the connector prong to the coil on misfiring cylinder isnt fitted into the connector properly ive done it myself....what you do is let the car idle and disconnect each coil connector until you find the one that doesnt make a diffrence and theres your culprit

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I just got my car back from the mechanic with the same problem. What the problem was, the coil pack wire was shorting out and caused the car to misfire like hell. He replaced the sparks (copper ones gapped to .8) due to them fouling up and changed the coil pack wire. Car is 100% better.

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