seems to lose boost at the top end, after 5000rpm ot goes down to .4 bar still seems as quick to 100mph but after that seems to struggle,,

where it used to pull 160 easy seems to struggle to get over 140?


anyone got any ideas?

i'm sure if i took it to porsche they would say its fine as they couldn't perform such test!


thanks andrew

 

What MY ?

 

late 2007 my 08...

 

have you noticed longer cranking times than usual before actually starting? the reason I asked is that I had GTS had the same problem, hesitation at higher rpms..it turns out to be the HPFP

 

Thats the only think that makes sense to me, I have not heard of turbos breaking so soon if at all.

 

not notice longer cranking but will look for that now, also when you cruise around 60 mph it gives a wee missfire now and then, i put that down to plugs as its done about 43k miles on the original set

 

I would suspect coils before plugs, can you check for error messages ?

 

would the durametric software show actual and desired pressure?

 

I dont think so but it would show coils

 

what way would the coils show up? through fault codes?

 

you generally see a bank error

 

its out of warranty but i'm going to take it to porsche for service and get extended warranty and hope the coils etc pass inspection then put it back in and see if they will fix the issues?
coils my not be coverd thou?

 

they may be they are comon enough failures, its an easy diy job if you have tools in your sporan

 

are they unique to porsche or can be sourced throu vag groupa or that?

i have a shop so tools are no problem.

http://www.moorfieldmotorservices.co.uk/

 

The coils are common to both marks I believe, 948 602 104 02 is the PAG number