kris1990

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

Pigman149

iTrader: (1)

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

just me

iTrader: (3)

have you tried cleaning the boost control solenoid?

kris1990

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

Pigman149

iTrader: (1)

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

barnshaw

iTrader: (1)

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?

kris1990

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

Pigman149

iTrader: (1)

check lines from boost solenoid

kris1990

ill have a check just now

kris1990

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?!

Pigman149

iTrader: (1)

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

kris1990

So all hoses are fine and connected any other ideas?

Pigman149

iTrader: (1)

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?

kris1990

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

kris1990

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

kris1990

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.

ScottyPPP

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.

kris1990

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?

Pigman149

iTrader: (1)

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.

ScottyPPP

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

kris1990

it only does that noise when its fluctuating?

ScottyPPP

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

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

Athame1

iTrader: (2)

How much coolant in the radiator expansion tank ?

kris1990

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

Athame1

iTrader: (2)

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.

ian.e

iTrader: (1)

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.