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

[boostordie]

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

Wow, sorry I missed this. Clunk no big deal. Not boosting and then boosting hard is NOT bad knock sensor (which is easy to change). Lots of lag and then hard boost sounds like either aftermarket turbo (lazy) or poorly set boost controller. What kind of boost control does it have? Stock turbo? Let us know if you need any more help. www.primemr2.com. If it's 3sgte we probably know it. Have a great day.

[Nial]

Fig 8s can be a little tricky to replace, in theory it's only two bolts, but sometimes the bolt part can turn with the nut which makes removal a bit of a chore, or it can be simple it's just the luck of the draw. Fig8 on its own is around £100 to buy a new one, if it's the arm it's attached to then it starts to get expensive, nearly £400 for the lower arm, slightly more difficult to remove but nothing that a bit of patience won't see through.

Sounds like it has a hybrid turbo fitted? Mine is the same, if it's a standard turbo then there is a problem somewhere, as mentioned a badly set up boost controller or it could be failing, remove the pipe from the turbo that goes to the air box, then carefully with two fingers get a hold of the turbo shaft, there should be a slight amount of up and down movement, it will feel like about 1mm of movement but it's probably less, this is taken up by the oil pressure when the engine is started. However there should be no in and out movement what so ever. Turbos are obviously expensive and a bit of a nightmare to replace.

[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.