when i put my foot down the turbos kick in fine but about 2 seconds later the car stops accelerating and it makes a funny humming noise.i think its when its changing gear. then when it does change the gear it stops slowing down. its an automatic.

 

sorry if this is hard to understand. its hard to explain in writing!

 

Has any one got any ideas what the problem is?

 

i thought it might be one of the gaskets going on the turbos.

 

Thanks

Nick

when i put my foot down the turbos kick in fine but about 2 seconds later the car stops accelerating and it makes a funny humming noise.i think its when its changing gear. then when it does change the gear it stops slowing down. its an automatic.

 

sorry if this is hard to understand. its hard to explain in writing!

 

Has any one got any ideas what the problem is?

 

i thought it might be one of the gaskets going on the turbos.

 

Thanks

Nick

could be a fuel problem . ie not getting enough so the power is cut back . could be air leaking on the boost side . check these first mate :duffer: :duffer:

how would i check the fuel problem?

 

Nick

Is it a standard car or modded/chipped?

its standard apart from cat back exhaust.

 

Nick

Auto or Manual?

automatic.

Is the boost staying up in the top end of the scale during gearchange?

i dont think it is but the turbos are on after gear change.

On an auto you shouldn't lose boost on gear change. The revs should stay about the same, a little bit of slow gear change.

 

I can't think what the humming noise would be without hearing it matey.

 

The only thing i can think of is that it's to do with the gearbox, maybe a worn torque convertor?

when i put my foot down the turbos kick in fine but about 2 seconds later the car stops accelerating and it makes a funny humming noise.i think its when its changing gear. then when it does change the gear it stops slowing down. its an automatic.

 

sorry if this is hard to understand. its hard to explain in writing!

 

Has any one got any ideas what the problem is?

 

i thought it might be one of the gaskets going on the turbos.

 

Thanks

Nick

 

you mean it starts to accelarate again once it changes gear? Have you tried booting the car in each gear and changing the gears manualy to see if it does it then?

you mean it starts to accelarate again once it changes gear? Have you tried booting the car in each gear and changing the gears manualy to see if it does it then?

 

yer. thats what i mean. it does it in every gear.

 

Nick.

every gear, how weird. i still think it's more to do with the torque convertor on the box than the engine or maybe even a vacuum leak that's slurring the gearchanges a bit

is the kick down working properly?

do you think its any thing to do with the turbos?another thing i forgot to mention it struggles to get into gear when i boot it thats when it makes the humming noise.

is the kick down working properly?

 

what do you mean by the kick down?

 

Nick

ok if your in top gear driving normally when you put your foot hard down the car drops down a gear or two the revs shoot up and the car accelarates off pretty damn quick

it does that but after the humming and after a couple of seconds.

ok try doing a diognostic check on the gear box this will help http://www.twinturbo.net/ttnettech/autodiag/autodiag.html

Good idea i was just about to say that, i'm 100% sure its the box, something to do with the vacuum hence the humming (leak)

thanks for the help everyone.

any other ideas will be a great help. keep them coming!

 

Nick

I think the autobox diag should give you your answer. its usually pretty accurate

i take it you have checked the fluid level and condition of the fluid

i take it you have checked the fluid level and condition of the fluid

 

yer thats all fine!

if its a vacuum leek is there a common place where it leeks from?and if its the torque converter would it be easy to fix and would it cost much for another one?

 

Nick

mine just started doing this tonight aswell going up to the garage tomorrow to see about something else so going to ask them what it is mines has just had a new gearbox and engine rebuild.