SW20 turbo/engine problem

[TURCEL]

Hey everyone,

I was just wondering if anyone could give a little advice on a problem I'm having with my sw20. Its a 1990 Toyota Mr2, with a 3sgte motor the one with the ceramic twin entry turbo, its pretty standard apart from the blowoff valve adjustable boost and airfilter. The problem i'm having is that occassionally I will go to accelerate and when I plant my footdown there is no power, sometimes it goes, but other times... its like its struggleing to get air.

Then this weekend I wound the turbo up for a bit of a joy ride. I took it for a bit of a blat, and going up the hill before tauranga it started spluttering, I checked the boost gauge and it was like cutting out on 15 pounds and bouncing between 13-15psi, plus there was black smoke coming out the exhaust, so i pulled over and it looked like it had been spitting oil out of the blowoff valve, because there was a ring of oil on the inside of the blowoff, to me it sounds like it is poked, does anyone know what sort of damage I may have caused?

[Silent Knight]

Can't really say what the damage is or the extent of it without having a look really.

You using just a bleed valve or a proper EBC for your winding your boost up and down?

Spluttering etc could be from a leak somewhere or car not getting enough spark? If your BOV is filled with oil then it could be that there is oil covering your spark plugs which will cause them not to spark properly...

[Chickenman]

Sounds like knockety knock?
I had problems in my standard MR2 on standard boost when it was cold with 96.

But 15 pounds is probably pushing it on an older car anyway.
Your rings are probably going and/or the turbo is finally packing a sad (which they do) and leaking oil into the intake and/or exhaust. Take off your intercooler pipe and see if there's oil dripping out of there.

If it's just a bleed tap controlling your boost get rid of it. A bit of money now will save you a lot more later... if it's not too late already.

[TURCEL]

Yeah it is a bleeding boost control, probably shouldn't of had the boost up so high, I was told not to take it over 14, but since its a bleeder, I couldn't tell how much it had gone up, until it was to late, plus I didn't back off because this Holden was giving me a go up hill and i should really have given up as soon as I saw the billows of smoke following behind me,
-=sigh=-

Can anyone recommend a good turbo mechanic?

[Malcolm]

how much oil is coming out of the blowoff valve? If it's a fairly significant amount (ie small drips falling off the BOV outlet straight after a hard drive) then there's a good chance the turbo seals are poked. Any smoke out the exhaust at idle?

[TURCEL]

Not that much oil, like after a hard ride it was like a small spray, i wiped my finger over it to tell taht it was oil, plus no smoke at idle, i put my hand over the exhaust and got just clear water drops on my hand

[Malcolm]

the oil is probably just coming out of the PCV then, nothing major. Assuming the car isn't misfiring (you'd know if it was) then I'd do the following:
Put 98 in it
Set base timing to 8 degrees
Disconnect/disable T-VSV
Set boost to 13psi

and see how it goes. It sounds to me like the ECU is pulling timing due to excessive knocking. Also a quick check for error codes could shed some light on the problem if the above doesn't fix it.

edit: you're in auckland, of course you can get 98

ps. manual boost controllers are fine, just keep an eye on creep

[Dell'Orto]

Black smoke would mean fuel, so its possibly a broken down lead, or worn plugs/rotor/dizzy cap.
15psi is right on the edge for a CT26 as well, I'd ditch the bleed valve. How are you bypassing the fuel cut?

[Akane]

how much oil is coming out of the blowoff valve? If it's a fairly significant amount (ie small drips falling off the BOV outlet straight after a hard drive) then there's a good chance the turbo seals are poked. Any smoke out the exhaust at idle?

Not much, just a few drops

[Adydas]

Oh thats nothing..

[Malcolm]

how much oil is coming out of the blowoff valve? If it's a fairly significant amount (ie small drips falling off the BOV outlet straight after a hard drive) then there's a good chance the turbo seals are poked. Any smoke out the exhaust at idle?

Not much, just a few drops

nice, looks like the sw20 donor I got for the aw11 after driving it home. Lots of oil out the ricepro bov all over the engine, and lots of whitish/blue smoke at idle. Yum.