i get the same thing. i think it could just be that water might drip down from where the heater vsv is and touches the hot exhaust parts. at least that what i think my problem is.

 

I have the same problem but its not consistent. Might be cause my cat is hollowed out now.

 

80er - if this is actually SMOKE as opposed to steam.. its one thing and one thing only, from your description of when it happens its a dead giveaway.

Blown turbo seals.


Supratrbox ... yours is also probably blown turbo seals. When you free up backpressure on the 1J (by for instance hollowing out the cat) the turbo seals normally blow very shortly afterwards.


I hate to be the bearer of bad news but it's when its happening that is the giveaway. Classic turbo seal symptoms are wispy smoke coming from the exhaust after coming to stop at traffic lights, or when idling down after a boosted run. It normally starts within a minute of coming to a stop and continues until you start the car moving again.

Coupled with the fact that the 1J is known to blow its turbo seals regularly its almost a certainty.

 

It was blown turbo's

Got others and the car ran nicely

 

deaded turbos ftl

 

Just curious.... how can freeing up the exhaust system cause the turbo seals to blow? Isn't restriciton in the exhaust, backpressure, the main killer?

 

I would assume(don't take my word) that since you free the exhaust up to a MUCH greater level than stock(thus giving the ability to boost more) you stress hte little buggers out and kill them.

 

i dunno.. for some reason the backpressure is needed, and when you remove it the turbo's tend to go. Maybe this is the reason for the weird Y pipe design? Who knows.

All i know is that it happens..