Hi, need a bit of help please!

I've got a MY05 STI UK with PPP to 333 by TSL (remap/exhaust) and running on Tesco 99 RON. For the last week when accelerating, at 3800 rpm there is a loss of power for about a second. It's ok if I'm on maximum boost or no boost at all, but if it's early stages of boost it's quite noticeable.

Any ideas what's causing it??

Cheers

 

Could be boost selonoid, sound same symptoms as mine had last year. I had to replace mine as cleaning it didn't work

 

Thanks Tez; how much did you have to pay to get a new one / fitted?

 

Very easy to fit, its just a connector block and three pipes, brand new the are something rediculous like £250. 2nd hand are about £40. Really int worth paying for fitting though cos its very easy.

 

Great - thanks for that. Got my project for the weekend!