Thinking of buying a gt4, Please read, in need of advice Options

[Lewiehigh91]

Hi everyone .
I hope I've posted this in the right place.
I'm quite interested in a gt4 st205 I've been offered, but it had a few small issues with it.....

There's a slight knocking coming from the near side front suspension, the current owner seems to think it's a figure 8 linkage arm?
Would this be an expensive or hard part to replace?

Also, his advert says the car is not boosting untill 4500rpm, then it will boost hard to around 14psi (read on a digital boost gauge). The owner seems to think it's due to a faulty knock sensor. Does anyone think this is right? If not what would be the problem? And again is it an expensive or hard fault to fix?

Some help would really be appreciated!

Lewis

[lagos]

A bad knock sensor will throw a trouble code and put the ecu into limp mode. The car will run with very little ignition timing advance and that will totally hurt the spool of the engine. Its an easy repair as you just unbolt the sensor and bolt the new one in, but its hard to say if thats the real problem or if there is also something else going on.