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Posted

Yet another problem lol.



Started to missfire when on boost? No idea why. Got nkg leads and iridium plugs. I've never changed the plugs or leads since i've had the car. Pretty bad of me i know!



All plugs are on, why is it missfiring when boost comes on? On idle and other driving it's perfect as always, only when boost hits it starts spluttering.


Posted

Ok, what is the gap supposed to be??



Also i have these brand new plugs i bought when i got the car but never put them in, they are ngk BKR5EYA... I never put them in, i just cleaned up the iridiums as i thought they will be better. But will they be ok to use? Like, will they be sufficient enough for the engine etc?


Posted (edited)

Those are too hot plugs and you will get the missfire a bit earlier, so better to get new BKR7 iridiums or equivalent



and 0.8 for gap.


Edited by JayJ
Posted

What am i checking them for lol? What am i supposed to be looking out for?



The king lead is like 2 weeks old, and was brand new so i don't think it will be that!



Why would the ignition timing have gone out?


Posted

Check that the leads aren't loose, check THIS, so you can compare the condition of rotor arm and distributor cap.


Timing can change, if your distributor bolts are loose and the position has changed.


  • 5 years later...
Posted
4 hours ago, Mostyn said:

Did you sort this out ? If so what was the problem? 

What issues are you having? 

Posted

@Jay85 it's spluttering like hell only in boost runs perfect out of boost, running a td04 external gate changed dizzy cap and rotor arm,plugs,turbo,king lead,ignitor 

really doing my head it 

Posted (edited)

Check your king lead, this is the Center lead that goes from dizzy to coil. It’s quite possible this is fooked and is breaking down under load. 

Edited by Jay85
Posted
59 minutes ago, Jay85 said:

Check your king lead, this is the Center lead that goes from dizzy to coil. It’s quite possible this is fooked and is breaking down under load. 

Already changed it mate genuine Toyota one too 

Posted
2 minutes ago, Mostyn said:

Already changed it mate genuine Toyota one too 

What else have you tried? Save me some time with the guesswork 

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