whining from bay on acceleration

[james walker]

guys... just developed a noticeable whining noise when accelerating, seems to be on boost only, cant really tell. no noise when stationary revving

i know that my maf is knacked, done a few tests.. running 1250 mbar boost, previously at 1450mbar

bhp down from 232 to 212...

running lean as getting 4-5mpg less than before

lumpy acceleration, casued by maf failure i think

bothered with the whining noise... any ideas??

due a service now.

noticeably lack in acceleration, surging is also apparent


whaddya think

cheers

 

[james walker]

right im replacing the maf for the boost problem.

whining
1. power steering pump pulley., power steering creaks now sometimes on full lock.
2. other cam pulleys??
3. water pump?


any other ideas fellas

 

[LEE69]

Not the Mrs is it

ermmmmm

Belt maybe to tight but you have not had that done have you?

 

[james walker]

ha ha, you know that mrs joke is on every search i have done on this topic......

nah belt done 30k ago?

 

[Willie]

I had this for a bit and it's gone
Didn't do anything but keep fingers crossed, lol

 

[james walker]

mines getting progressivly louder willie, servicing it on monday, maybe it needs new oil....

 

[Willie]

I put it down to a pulley but its gone now.
Did mean to buy a stethoscope to pinpoint it

 

[james walker]

yeah, got the missus to blip the throttle while i listened, she gunned it, nearly blew my feckin ears off.... binned that idea!!!!

im thinkin a pulley bearing... god knows which one like

 

[LEE69]

Put a screwdriver on to them, and feel the difference in vibration, for goodness sake be careful.

 

[james walker]

hmmmh... i can see that going wrong... good idea though matey.

 

[Markyboyt]

use a long screwdriver and put your ear to the handle, the sound transmits up and you can hear it. Make sure once you take your eye off it that you wont slip lol.

 

[james walker]

may just invest in a mechanics stethoscope tbh, sound easier than jamming a screwdriver in the belt!!!

 

[james walker]

another thought, sometimes i get a whale like noise on full lock, points towards power steering pump, could this be the cause of the whining.... maybe the pump is on its way out?

will check the reservoir a.m to see the levels...

 

[olliep]

gearbox whine?

 

[james walker]

well, discovered the whine isnt there when stoodstill revving engine.

is there when driving through most gears at higher revs.

boost issue sorted with new maf, bhp back to normal... did a throttle body clean and realign aswell.


still stuck on the whining, if it was a pulley then id have thought it would have been there when standing still and revving??


swaying toward gearbox now.

 

[Markyboyt]

well, discovered the whine isnt there when stoodstill revving engine.

is there when driving through most gears at higher revs.

boost issue sorted with new maf, bhp back to normal... did a throttle body clean and realign aswell.


still stuck on the whining, if it was a pulley then id have thought it would have been there when standing still and revving??


swaying toward gearbox now.

A quick test to rule out the pulleys driven by the auxilliary belt would be to remove the belt and test it, obviously only a very short run and carefully as you'd lose power steering.

 

[james walker]

would the pulleys not whine when not driving and revving aswell though mate?

ideas so far... clutch bearing... bad
gearbox oil level...
cv joint with no grease in it.


hmm..

 

[Markyboyt]

would the pulleys not whine when not driving and revving aswell though mate?

ideas so far... clutch bearing... bad
gearbox oil level...
cv joint with no grease in it.


hmm..

You would think so yes but is easy to rule out.

 

[james walker]

ill try the stethoscope when it arrives tomorrow, dont fancy taking the belt off really.

well its in on tuesday nxt week to have the quaife fitted so thatll sort the oil theory out, and will see if the bearings of any sort are fooked.

 

[richybigman]

Check the hose fron turbo to charge pipe as mine made a really bad whining noise when the jubilee clip failed on it.