Z34 turbo??? or blown???

[miamiz34]

Hi there let's see if anyone has come across this problem...

I have a 93 Lumina Z34 w/ 85Kmiles on it. has never had a problem except the infamous timing belt.
For the past month I have been listening to a kind of whizzling sound coming out of the engine bay when I downshift the car under hard acceleration. It sounds as a turbo at some point, at higher revs, the engine seems to be screaming as if is going to blow!!! It had never sounded like this whatsoever other than the normal "growl" the DOHC makes under same conditions.
Now today coming from work, the car hesitates under highway speeds, you can smell exhaust inside of the car and the transmission seems to be upshifting and downshifting erratically. It also hesitated to accelerate under 1st and 2nd and it has actually shutdown at some point.
Would anyone think that tranny problems would make this engine perform like this?
I have heard that this tranny is kind of bad when it breaks down also, thet the front transmission pump, does make a similar sound "whizzling" when the front bearing (converter clutch and input shaft) breaks down?

Any suggestions???

Please reply, any help is greatly appreciated!!

[toellej]

[quote=miamiz34]Hi there let's see if anyone has come across this problem...

I have a 93 Lumina Z34 w/ 85Kmiles on it. has never had a problem except the infamous timing belt.
For the past month I have been listening to a kind of whizzling sound coming out of the engine bay when I downshift the car under hard acceleration. It sounds as a turbo at some point, at higher revs, the engine seems to be screaming as if is going to blow!!! It had never sounded like this whatsoever other than the normal "growl" the DOHC makes under same conditions.
Now today coming from work, the car hesitates under highway speeds, you can smell exhaust inside of the car and the transmission seems to be upshifting and downshifting erratically. It also hesitated to accelerate under 1st and 2nd and it has actually shutdown at some point.
Would anyone think that tranny problems would make this engine perform like this?
I have heard that this tranny is kind of bad when it breaks down also, thet the front transmission pump, does make a similar sound "whizzling" when the front bearing (converter clutch and input shaft) breaks down?

Any suggestions???

Please reply, any help is greatly appreciated!!



What kind of transmission? 5 speed or auto

[miamiz34]

it is a 4 speed automatic, hence the converter clutch sectoin in last reply....

[jeffcoslacker]

Make sure you haven't got a cat blocked, it might have burnt through the shell to get exhaust through. Would explain the smell, noise, and hesitation/power loss. Just a hunch.