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The mkiv Supra Owners Club

Not boosting properly and overheated?


Pig

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Noticed on suday that the car wasnt boosting properly.

Went out tonight for a hoon and it was still the same.

Symptons before tonight: boost was still over 1 bar but seemed to struggle to get the the redline.

(First noticed this hapening after hitting the rev limit on sunday)

 

Tonight: Seemed fine, making all the right noises etc. Was driving down the road and car didnt seem to be pulling right - reset boost gauge and the car was only boosting to 0.8 bar. (was boosting 1.3)

 

About 10 mins down the road, i noticed smoke from under the rad catch tank, pic to follow,. Popped the hood to find the fan cover had snapped and was jamming the fan. Temps were 0.5 cm off red.

 

Let is cool down for 1.5 hours and topped the rad up, on the way home temps were perfect but couldnt get over 0.5 bar boost.

The turbo flutter, wastegate chatter and dump valve are now not making any noise. If i let boost build and lift off, i am getting a wcchhhhsssssssss noise but it doesnt sound like it coming from anywhere its meant to.

Car is a daily driver at the moment as lots other car keys, advice please.

Hoping to get booked into turbofit soon to check over.

Would also like to say, i think this is "one of those things" and not down to bad workmanship as car was running like a dream.

 

image

 

image

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That sounds like something for the day light :( Where is it likely to rupture? I checked the hoses @ the back of the throttle body and all the ones i could see in the engine bay. (will put it on a ramp tomorrow.)

 

The wastegate is still making its noise though??? e.g screamer pipe. Still sounnd like a boost leak though?

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Don't push the engine until you know whats wrong.

 

The symptoms do sound like an IC hose has popped off somewhere, or there is a leak elsewhere.

 

PS: Rad cowlings don't just "snap", I'd make sure you get the replaced FOC by the garage that last messed with it or the rad.

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Don't push the engine until you know whats wrong.

 

The symptoms do sound like an IC hose has popped off somewhere, or there is a leak elsewhere.

 

PS: Rad cowlings don't just "snap", I'd make sure you get the replaced FOC by the garage that last messed with it or the rad.

One of the places where it bolts on was broken. I assume, before it was stripped. It must have been the play that let it catch

 

edit: will cruise into work tomorrow and look from a ramp. fingers crossed it will be obvious

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Hope it's not too serious mate! You just got the bleeding thing back :( Fingers crossed for you mate.

 

Engine seems to be running fine mate so am not worried TBH. Thanks though

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Cor blimey dude :( You need more/stronger dragonball stickers :)

 

Never seen a shroud go like that, not even close. Either it's your bad luck or someone thought it was a load bearing structure while they peered into your engine bay...

 

Maybe you've melted a vac hose going to the bov/wastegate etc due to overheating. Thin, but can't really think of much else.

 

-Ian

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Ok Good news - After topping the car up with water last night and freeing up the fan, the temps have been fine all the way to work this morning.

Got the car on the ramp and it turned out just to be an I/C pipe - good guess homer. Took her out to check things are ok and all seems great! Cheers for the advice all!

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Good news glad everything seems ok now, I just got mine back and broke down yesterday, overheating and steam everywhere !!

RAC took the car from London to Turbofit where Greg jumped straight on it and sorted it, the thermostat has stuck, simple as that, but like you I am sure I was thinking the worse ! :D

 

Cant praise TF enough for the speed they get things done

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