Strange Noise From Front Of Car

[89CAL]

Hi everyone

Have recently started hearing a strange noise from the front of my car. the best way i can think to describe it is that its kinda like running a wheel over those noise lines on the side of the highways (small bumps that make that noise to wake drivers up) BUT my car is only doing it at just above 3000rpm, about 40kmh at 25% or so throttle in 2nd and just below 3000rpm, about 60kmh at about 25% throttle in 3rd.... Not sure what it is so hoping someone here has had a similar issue. The noise only lasts about 2 seconds i guess at the most and doesnt happen if i give it full throttle or different throttle applications, seems to be limited to about 25% throttle or near enough. Lets just say light throttle anyway

also if it has anything to do with it, i can sometimes hear over bumps another noise that sounds like I've left a hose clamp loose on a pipe so its just flapping around there making a very light metal on metal noise. Its not constant, sounds just like hose clamps tapping on intercooler pipes or something over bumpy road.

Details on car:

R33 GTST 1994

FMIC

X-Force 3" turbo back exhaust

K&N pod filter in cold air box

Splitfire Coilpacks

Power FC

stock suspension

stock turbo

recently put a front strut brace on and replaced my bov with an aftermarket one (that is plumbed back)

100,000km service has been done, car has 113,000km's on it now.

The 2nd noise described has been happening for a little while now and the 1st noise i described is more recent

If anyone can help me that would be great Ive looked around and cant notice anything so im a bit stumped

Thanks

Callan

Edited December 17, 2009 by 89CAL

[shyr33]

I get a noise like the first one you described in second gear when I am at lower revs but I think its because I have a heavy duty clutch and it needs more revs to get going. But thats at like 1200-1500rpm. Is the noise like when you put the car in a higher gear e.g. 4th and your at low speeds/revs and try to accelerate or.....? You havent had the clutch changed or anything lately have you?

[RBChris]

I had a similiar noise and my turbo went the following week, it sounded more like a vibration that went away at higher revs.

[89CAL]

Strangely enough it was my blow off valve

I think it is either the seal for the screw in outlet (Which is different as i had a plumback one made up) not sealing on the o-ring

OR I removed one of the internal springs (had 2) because i had the same bov previously and it wasnt going off so i removed one of the springs to get it to work and later found out the diaphram was broken

So anyway, it was just the BOV, as for the other noise, not sure but it cant be anything major, think its just a loose bolt or something floating around

Yeh i have an aftermarket clutch but i know th strange noises it makes lol and this was a new one

All good. Thanks