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Steviegeeza

Ls 400 Mki - Loss Of Power And Whistling Noise!

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Hadn't used the car much for 18 months put it back on the road

this week , first day I used it, it ran well, next day, pulling away

from lights, noticed loss of power when accelerationg hard at 3000+

revs . :blink:

Power loss acompanied by a whistling/squealing noise not loud but

noticeable and only there when power loss is provoked by putting

my foot down.

Car is drivable but lacks the usual >>go>> :crybaby:

Suspect fuel problem - perhaps contaminated fuel filter or failing pump? :question:

Anyone had this or anything similar happen and knows what the problem is most likely

to be, before I start taking it to bits.

Thanks in anticipation

Steve

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Hadn't used the car much for 18 months put it back on the road

this week , first day I used it, it ran well, next day, pulling away

from lights, noticed loss of power when accelerationg hard at 3000+

revs . :blink:

Power loss acompanied by a whistling/squealing noise not loud but

noticeable and only there when power loss is provoked by putting

my foot down.

Car is drivable but lacks the usual >>go>> :crybaby:

Suspect fuel problem - perhaps contaminated fuel filter or failing pump? :question:

Anyone had this or anything similar happen and knows what the problem is most likely

to be, before I start taking it to bits.

Thanks in anticipation

Steve

sounds like one of ur belts is gone, either serpentine or cambelt..?

hmmm, power loss, could be sparkies? what's the mileage? could be dirty air filter? start with the basics of a tune up and take it from there.

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poss a air leak some were it whould give you loss of power and a noise have you lifted the bonnet yet to see if you can see anything

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I have to agree with Lutonmatt look and listen for an induction airleak ( perished vaccum pipe? or do you have an errant squirrel population!) if you can't locate precisely try a piece of plastic tubing,one end the ear and probe the other end to assist locating be careful of course of moving parts.

Cheers,

Steve

P.S Welcome to LOC!

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Hadn't used the car much for 18 months put it back on the road

this week , first day I used it, it ran well, next day, pulling away

from lights, noticed loss of power when accelerationg hard at 3000+

revs . :blink:

Power loss acompanied by a whistling/squealing noise not loud but

noticeable and only there when power loss is provoked by putting

my foot down.

Car is drivable but lacks the usual >>go>> :crybaby:

Suspect fuel problem - perhaps contaminated fuel filter or failing pump? :question:

Anyone had this or anything similar happen and knows what the problem is most likely

to be, before I start taking it to bits.

Thanks in anticipation

Steve

sounds like one of ur belts is gone, either serpentine or cambelt..?

hmmm, power loss, could be sparkies? what's the mileage? could be dirty air filter? start with the basics of a tune up and take it from there.

It's a bit strange that it was ok for a day - but while I was waiting for the local toyota dealer to get the

filters, I hoovered the air filter ( quite a lot of flies and dust) and ran some injector cleaner in the fuel,

this has stopped the whistle and gone a long way to putting things right, still a bit hesitant at 5000 to 6000.

I can only think that putting my foot down sucked the crap out of the air box into the filter , come to think of

it a 4ltr V8 will be trying to pull around 60 ltrs of air a second at 4000rpm so I suppose it doesn't take

much of a restriction to make a difference, I wonder if K+N do a hi- flow filter for the LS400?

Searching the Forum it looks like they do - i'll have to get one - It must be really bad if you drive a car that does

not have an owners club web site, you would be completely at the mercy of the dealers :o

I'm driving the Lexus while my Supra TT is of the road having BPU+ mods done, I had forgotten how nice

driving the old girl is! :D

Thanks for the replies :)

Steve

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