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Location:
melbourne
Registered:
November 2003
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has my head gasket gone? 3sgte.
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Mon, 06 June 2005 13:41
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ok, this is a gen1 3sgte in a st165 gt4.
notice driving home tonite, that im boosting hard and not getting any power. boost gauge is showing approx 9-10psi, but when you put your foot to the floor in really any gear now, i notice theres no power there, despite the turbo spooling up fine. put my hand over ther air intake and and i can feel it sucking in air.
this use to happen only in 3rd gear really, but now it sorta happens in any gear. like its goten worse. its sorta acceletates ok, but when boost comes on, its like its really holding back
when it cold starts it idles REALLY low, like 400-500rpm untill it warms up. then it idles fine.
ive noticed that when i start it up in the morning, there is heaps of soot blowing out the exhaust too.
what could be causing this? it doesnt feel like fuel cuts, im thinking that the headgasket is blown.
how do u detect a blow headgasket, do i need a compression test done?
what do u rekon?
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Location:
Sydney
Registered:
February 2003
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Re: has my head gasket gone? 3sgte.
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Mon, 06 June 2005 13:42
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get a compression test, tk head check, and cooling system pressure check.
they should tell you if you have a bhg or not.
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Location:
melbourne
Registered:
November 2003
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Re: has my head gasket gone? 3sgte.
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Mon, 06 June 2005 14:33
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tk head check? whats that?
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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Re: has my head gasket gone? 3sgte.
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Mon, 06 June 2005 15:06
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What does your oil look like dude? Creamy? Or just normal. Check your coolant as well and see if its got oily deposits. Those are classic signs of BHG.
When your boosting hard and not going any faster.. are you blowing black smoke? If so, maybe one of your hoses have come loose?
Just some thoughts...
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Location:
The Hills District
Registered:
November 2003
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Re: has my head gasket gone? 3sgte.
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Tue, 07 June 2005 05:50
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the low idle could be due to the turbo not working properly either because it itself is busted or theres a leak somewhere in the piping. if theres a leak it will spool but not get air into motor as usual. check that. by the sounds of things its prob not a BHG. as mentioned above check oil for cream and check coolant for bubbles or oil deposits. also a compresion test will let you know.
hope thats some use. Leigh
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Location:
melbourne
Registered:
November 2003
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Re: has my head gasket gone? 3sgte.
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Tue, 07 June 2005 06:21
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checked the oil and the coolant, both look clean as a whistle so im sorta leaning back from it being a HG.
although im still stumped as to what it could be. got a boost controller and boost gauge, which are showing that there is good boost beeing made, and it is not going over 10ish psi. vacum sits between 50 and 60 at warm idle.
i guess it could be a faulty sensor causing fuel cuts or something, but it doesnt feel as rough as fuel cuts.
checked all the main hoses, and theres no where that ther could be a leak from the turbo to the Throttlebody.
what are teh chances of my exhaust clogging up due to all the carbon etc i get at cold start, and causing the problem?
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Location:
Syd
Registered:
October 2004
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Re: has my head gasket gone? 3sgte.
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Tue, 07 June 2005 07:06
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dude i feel for u... i hate wen this happens....
if u have a bov check that its connnected properly and dat der is no air leaking from it( i had a massive crack that took me about 3 months to notice)
secondly check that all your clamps are tight, like the turbo to d cooler clamps and d cooler to the intake.... this was loose on mine and caused it(aswell... have had alot of problems)... edit* read now that you checked it..
and after all of that... just check that all your hoses are still where they have to be...( i had a t-piece inserted and only 2 hoses going to it...)
hope that helos
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Location:
The Hills District
Registered:
November 2003
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Re: has my head gasket gone? 3sgte.
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Tue, 07 June 2005 12:38
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(*lightbulb lights up over my head) this just popped into my mind as you mentioned exhaust clogging. when my cat converter shat itself i noticed a definate power loss (the sx almost got muched by an auto laser  ). anyways i got under the car as something was rattling and i had a feel around and thought it was the heat shields come loose. anyways i banged under the cat and could hear and feel loose stuff inside. turns out the cat had died after only 2 weeks or so. when they took it out the honeycomb sorta stuff had started to discintegrate and when i gassed, the exhaust sent it to the back of the cat and it jammed the exhaust up making it go like crap.
it could also maybe be a sensor come loose or wiring worn out hence wrong readings>wrong fuel ratios>poor performance.
check the cat and have a look at sensors etc inclusing maybe the tps. well everyones narrowing things down so sooner or later youll hit the jackpot.
Leigh.
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Location:
melbourne
Registered:
November 2003
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Re: has my head gasket gone? 3sgte.
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Tue, 07 June 2005 12:42
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havent heard anything wratling down in the exhaust actually, and i havent seen any blaack smoke whilst driving, but then again i cant really see the exhaust when the boost is on. its like the boost is causing the problem, something is happening when boost comes on, even if its only low boost like 5psi ish, it starts choking.
im stumed, are there any recomedations for a shop in melbourne that are 3sgte specialists, or at least a toyota turbo specialist. i dont want the local mechanic who fixes ford lasers fuking around with my car.
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Location:
South Australia
Registered:
July 2002
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Re: has my head gasket gone? 3sgte.
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Tue, 07 June 2005 12:53
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Check ECU for error codes dude - also check all your ignition leads etc, dizzy cap, igniter etc. If they are slightly faulty you may not be able to get spark when on boost, you'd probably notice the pinging noise though.
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Location:
melbourne
Registered:
November 2003
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Re: has my head gasket gone? 3sgte.
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Wed, 08 June 2005 06:42
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yeah no pingin noise that i can detect.
im starting to think it could be the fuel pump or injectors or even a fuel filter or something. like i said the problem is only with boost, u cant plant ur foot. and as i said before, the turbo is doing its job and suppling the air, and what does the engine do when theres more air beeing added, it adds more fuel! so if there is something blocking the flow of fuel...
what do u rekon?
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Location:
Sydney Australia
Registered:
June 2005
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Re: has my head gasket gone? 3sgte.
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Wed, 08 June 2005 07:09
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| carsanactra wrote on Tue, 07 June 2005 16:21 |
checked the oil and the coolant, both look clean as a whistle so im sorta leaning back from it being a HG.
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this is a reason why IT WONT be a h/g problem
as mentioned get a compression or leak down test done - that'd confirm h/g or not
im leaning more towards ignition problem - sound like a faulty lead or fouled plugs etc - check it all - check ur cap, ur leads, check each lead\spark individually whilst motor is running - process of elimination
put it this way - if leads are fine (physically), then move on to check spark (pull leads out one by one and bring near a metal surface to see spark jump - but make sure ur earth cos ull get a very big shock otherwise lol), if when u pull the lead the motor does not change note (ie continues idling fine) for any cylinder, but the spark is fine from that lead, then its a combustion chambr problem - ie. fouled up plug, bent\stuck valve, cracked head on that cylinder, cracked block etc etc
once again - a compression test will determine this
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