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The mkiv Supra Owners Club

Poping noises followed by loss of boost pressure


Matt Harwood

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On my way into work this morning, during a moment of haste, I had a loud pop from the engine bay as I let off the throttle in 3rd at about 5000rpm.

This instantly resulted in the turbos becoming very loud and whooshing instead of whistling and a definate lack of any positive boost, (gets to just under zero on the gauge).

 

I'm assuning I've either blown a hose off somewhere or split a pipe... Could be turbos but 'm not getting any real smoke from the exhaust, bit blacker than normal but no blue smoke...

 

I've done a search on blown turbos and loss of boost and there's quite a few to read through and I havent got time to go through them all and write down all the various possibilities.

 

Sorry for the lazyness, but can someone give me a list of probable hoses to check. - I've checked all the IC hoses and they're OK. If I rev the engine from under the bonnet, the whoosing sound seems to be coming from the turbo side of the engine roughly in the middle.

I have had a quick look but things are a bit hot at the moment.

 

Thanks for any assistance :)

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