Gt... Turbo problems - Alfa Romeo Forum
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Gt... Turbo problems

Hi, just wondering if anybody had issues with the jtdm 1.9 turbo on the Gt.

As of yesterday, under acceleration after 2.5k revs I'm getting a whooshing/ sucky sound along with a cloud of black smoke...

As you do I've accelerated hard to pin point the sound, the smoke seems not to be as bad, like a light grey smoke compared to the initial black smoke.

No serious lack in power seems the same as far as I can tell...

Also to throw a spanner in the works, no whooshing sucky sound when stationary, so seems to be only when it's under load

Any ideas???


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Check intake hoses for splits
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I thought that, can't see any while revving it... Would that explain the smoke though?


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99% it's a boost leak, probably a hole/split in one of the hoses.

The MAF sensor is before the turbo, so any pressurized air that leaks after the turbo is air that the ECU is expecting to make it into the engine... Hence it over-fuels (or in this case, under-airs) the cylinder, and unburnt fuel makes the black/grey smoke screen.
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I really hope your right lol, is there a easy way to check the hoses? Or is it best to completely remove


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A poke and squeeze goes a long way...

Look for any witness marks of oily deposits around them, that't usually a sign that they've been producing an oily mist for a while...

Lower hose usually goes first as it rubs on one of the gearbox mounts... Harder to spot without removing the engine under-tray unless you remove the hose from the car entirely (which can be done without removing the tray or jacking up the car)... In any case it's a single jubilee clip at each end of the hose holding them on, very simple to remove if you want to inspect thorougly

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Yeah thanks for that, I'll have a look tomorrow


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Hi.
I have got the same issue, with grayish smoke from acceleration.
I have been told that my turbo veins are sticking and that it needs a rebuild.
Again no serious loss in power but in 1st and 2nd it struggles to get up to speed from cold start.
Hope all works out for ya.
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(Post Link) post #9 of 9 Old 20-09-16 Thread Starter
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Mine was the top turbo pipe just as the editor said.
Veins are men't to be sticking in mine also, engine management lights on and used to cut the turbo out from over boost... I just used some addatives and sprayed some when's turbo cleaner into the inlet. Lights still on but not cut out since and plenty of power. Might just need light taking off.. If that fails try a specialist "engine carbon clean" they come out and put a machine on for a hour and that does everywhere... Turbo, dpf etc. Getting some really good reviews as well.... But not tried myself, but for 100 it's worth a go....


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