As stated above my boost fluctuates when 100% throttle lower down the rev range. 4k-5.5k?

Any ideas why?

is this normal?

See videos below.

https://www.youtube.com/watch?v=i1ds...ature=youtu.be

https://www.youtube.com/watch?v=gtRP...ature=youtu.be

 

not normal,i would guess boost leak/boost control of some sort

 

have you tried cleaning the boost control solenoid?

 

No i haven't where is this found? and how did i clean it?

Could it be fuel related its currently got unleaded in it. remapped for vpower. some silly person put in unleaded by mistake

 

normally mounted on the drivers side suspension turret,clean it with carb cleaner just make sure you put the pipes back on the right place

 

you have a boost leak of some sort by the looks of it, check for split pipes on intake areas, what dump valve are you running?

 

the car sounds like a rattle snake when it fluctuates. Standard BOV.

 

check lines from boost solenoid

 

ill have a check just now

 

just had a check, and they all seem to be fine, can't see of feel any bursts or splits. all hoses seem to be connected. See photo to make sure i checked the right thing?/

also the 1ST photo. what is that. cars been sat for almost 2 hours and its still burning hot?!

 

coolant expansion tank, and yes you have looked at the right part

 

So all hoses are fine and connected any other ideas?

 

clean out solenoid,and check for boost leaks.does it make full boost? is this a new fault? if its a new fault did you do anything before it happened?

 

how do you check for boost leaks? picked the car up at the weekend. just purchased. so couldn't say

 

it does make full boost, does that fluctuation but once up the revs. it holds boost

 

details from the description of the car says that its making full boost at just 2,800 rpm (approx 350bhp) after its re-map by Duncan Graham (Race Dynamix).

Its not making full boost that low.

 

Have you got a restrictor in the Vac line running to the boost gauge? As the needles on some gauges can flap about without a restrictor.

 

im not quite sure, but you can hear the "rattle snake noise" from under the engine. so I'm sure its not just the gauge?

 

You can check for leaks with soapy water,spray the pipes/clamps with the engine running then rev it up a bit,the best way is to pressurise the system.

 

The noise is just the boost solenoid. Mine sounds the same.

 

it only does that noise when its fluctuating?

 

Buy this: http://www.ebay.co.uk/itm/Inline-Res...item338f4ef257

Fit it in the VAC line that runs to the boost gauge.

 

How much coolant in the radiator expansion tank ?

 

Im not quite sure, could this be causing a issue?

 

May not. Mine did this when I had sticky thermostat

Seem to stay hot for longer,expansion tank empty after a drive so changed thermostat and all good.

 

If it's been remapped for v power, then I wouldn't be booting it with normal unleaded in it. This will cause its own issues. Top up with v power and take it easy for a bit.