on way to work this morning, giving it a bit of throttle weird sound plus immediate loss of power like a heavy hiss, when i pulled over bonnet open revving engine it appears to be from top of engine, sounds like air being forced out and something snapping shut , weird, the only thing ive had done lately new cambelt 2 months ago , 300tt auto import 1990 had it 7 years great fun, any ideas guys , thanks

maybe a boost leak. i have a similar problem, the sudden loss of power then hissing

 

Nick

on way to work this morning, giving it a bit of throttle weird sound plus immediate loss of power like a heavy hiss, when i pulled over bonnet open revving engine it appears to be from top of engine, sounds like air being forced out and something snapping shut , weird, the only thing ive had done lately new cambelt 2 months ago , 300tt auto import 1990 had it 7 years great fun, any ideas guys , thanks

dont mean to highjack your thread mate, but you shoould get your details down in the North East meets forum, and com to some meets bud. its great fun.

gotta be a boost leak mate. did it go pop just before???

gotta be a boost leak mate. did it go pop just before???

,cheers mate. something went, is it easy to sort

check the 2 large air intake pipes and the 2 large outer pipes from the turbo for tightness, you may have to trace the pipes down to the turbos and intercoolers too to check the tightness there as well. Also check BOV's if fitted or re-circs under the nose panel. Does the boost gauge read full boost still?

Also check the operation of the throttle bodies to see if its not one of them that is snapping shut

Also check the operation of the throttle bodies to see if its not one of them that is snapping shut

.. just started it up again , no sign of any noises etc gave it a good rev, boost guage working, last time i revved it noises were there as i said had the cambelt done 2 months ago i was wondering if anything could have come loose? thanks guys for taking the time to help . ken