Hi. So. I changed spark plugs with factory plus and factory gapped (1.1mm) for a ba xr6t stock tune. 

 

Ran ok....when giveing it heaps went fine no issues etc. 

 

 

Couple weeks later I decided to try (experiment) just normal copper plugs with a 1mm gap. 

 

First drive I could feel it wanted to go better (very slightly) so took it on to high way and from a stand still have it a bit and it went pretty good then boost cut and limp mode (over boosted) so drove it steady and came good.

 

Seems to hold 6psi then spikes . To 9ish 

 

Put other plugs back and seems ok 

 

So decided next day I'll try the copper plugs again and did it again..

 

 

Question.....can copper plugs cause this 😂😂 everything was fine and checked out fine 

never heard of such a thing... but seems like it's happening for you haha... play around with it and see if you can repeat it in different weather.

Haha yeah I'm open to all opinions etc. 

 

 

Just weired. Maybe when I'm swapping them I'm hitting some wireing or something. 

..ah well I'll sort it out. Atm it's running ok. Prob just weather here as some days it's cold and dense air and others it's just normal Haha

7 minutes ago, jas98 said:

I'm open to all opinions etc

 

Put 5 litres of E85 or methanol in your tank.

 

It has nothing to do with spark plugs but it'll make it go better.

😂

Update....so weired but it hasn't done it since I've kept the irridiums 1.1 mm gaped plugs in. I even tried it again couple weeks later with 1 mm copper plugs and it overboosted....old plugs back and fine. 

 

It's always used to have a overboost issue. When randomly overboosted but these plugs made it do it instantly

 

O