Noise At The Back!

[Deceeve]

Hi guys can somebody help me here?

I have an R33 and had just upgrade a few of these parts for my rear suspension,

Adjustable rear cambers

Whiteline pineapple

JIC height and dampening adjustable coilovers

along with these mods are also the upgrade bigger Walbro pump.

The problem is after i have these set up and drive for a short period of time and not to say the coilover is pretty damn too stiff for the back!

When i drive there is a really loud sudden of "Pressurize noise" So loud that it scares the living out off me as though something is about to burst or something....you know that noise when you have a leaking water in your radiator and when it gets too hot the pressurize steam comes out? Well that's very similar to that but just louder!!

When i rever i hear noise as though some metal is scraping against the inner chassis or something..Could it be the rear coilovers? What problem or symptom would it actuall shows?

Because i took both of the wheels out and check of any leakage in the coilovers there was none...and no oil dripping from the back or anything either.

Could there be something wrong with the fuel pump? but it couldn't possible make that kind of noise let alone when reversing?

Much appreciated if some of you guys here can help.

Cheers!