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1990 ST185 Strange Symptons

ST185 GT4 Smoke

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#1 arr4089

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Posted 22 August 2017 - 06:44 PM

Hi All,

 

Im Andrew. First time poster but long time Celica owner. Recently I have bought a ST185. I bought it with the the knowledge it may need a full rebuild. So its running very badly just off idel all through the rev range. When its warm its blowing some white smoke which increases to a lot when you get some revs into it. So Assumed its a cracked head or blown head gasket. However no oil in the water, no water in the oil. Does not over heat. Not using coolant.????? Pulled plugs and are fine, Put scope down the bores and the slugs look fine. Ran diagnostics, not error codes come up. Pulled cover off the turbo no oil or water leaks, no play in turbo shaft,  only thing I have found is oil in the piping between the Air Flow meter and intake on turbo....Ive been playing with 3sGTE engines for years now and this one has me really puzzled?????? Would love to hear off any other ideas on what this could be. I suspect it may of been cooked sometime in its life. Owner said it was rebuilt 18000km ago but im taking that as a grain of salt

 

Cheers

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#2 Alphabet-1

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Posted 23 August 2017 - 12:53 PM

No clue, but the oil between afm and turbo would probably be coming from your breathers, can be fixed with an oil catch can.
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#3 hemimark

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Posted 23 August 2017 - 07:40 PM

Test, clean or replace the PCV valve.
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#4 arr4089

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Posted 24 August 2017 - 07:01 PM

Ok thanks folks. Might replace the pcv. Would that cause it to run like a turd......



#5 Dvsone

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Posted 30 August 2017 - 06:35 PM

Have you done a comp test?

a blocked pcv can make it run like crap and blow smoke

#6 Ant1

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Posted 30 August 2017 - 10:55 PM

I was going to ask the same thing, compression test

#7 JB.

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Posted 13 September 2017 - 01:25 AM

Head gasket and PCV valve were my first guess too. Make sure to go over the entire wiring harness and make sure nothing is unplugged or damaged. A loose injector plug can confuse everything at/off idle. 

 

Is it hanging white smoke? like blue tinged, hangs around etc.? Or does it blow white and disappear?

 

In any case, I also vote for compression test. Take an average from 3 tests.

If the results are irregular or grossly out of spec, then perform a leak down test. Depending on the results it'll tell you where the damage is.


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