"engine Break Down On Dyno Under Load" Be Xr6T

[sprinter]

ok so got my ba xr6 t back after having it retuned by kpm to fix a boost problem, it made 288 at the wheels but now its having a problem with what they said either spark break down or maybe valve springs!

what does everyone think? could it be that the plugs need to be gapped/replaced "were replaced 15,000 ago" or maybe the coils? or valves?

car has a bigger front mount and new pipe work

bigger injector

and a growler induction kit

bigger waste gate actuator

and a tune running 13 psi

Edited 25/07/12 09:37 AM by sprinter

[xr6t_ute]

Most likely valve springs, did they regap your plugs down more, that could be worth trying if they didn't.

[sprinter]

nah plugs havent been touched that I know of what gap should they have and what is the stock gap?, what the car is doing is hitting boost then struggling to really go?

Edited 25/07/12 09:46 AM by sprinter

[xr6t_ute]

You can try gapping the plugs less and see how it is, otherwise I'd be going by what Kpm have said and change valve springs, my valve springs were playing up at 277rwkw.

Bf's, and Typhoons to Fg's can get away with a lot more power on std springs

[sprinter]

I might just bye new plugs anyway with less gap its not to expensive to do and see how that goes! other wise ill do the springs, any suggestions as to what springs to use?

[xr6t_ute]

There's a few out there, there's crow, atomic, nizpro, just ask Kpm and see what they recommend.

[ms700]

You cant buy plugs with a smaller gap, you have to gap them yourself.

And springs definately arent a 5 minute job either. Id just leave it with KPM, they will have experience in replacing valve springs.

[ratter]

  On 25/07/2012 at 10:06 AM, ms700 said:

You cant buy plugs with a smaller gap, you have to gap them yourself.

you can buy iridium plugs gapped to .8mm, better than regapping them

[spook]

You can buy plugs to suit that are pre gapped. Just have to get the right part number

[xr6t_ute]

bkr6eix is the ones your after.