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Technical 1.6 Mjet Loss of power

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Technical 1.6 Mjet Loss of power

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barry181091

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Hi guys,

Past few days I have noticed that my 1.6 '09 Bravo has gone quite limp. It can get to 100km/h but it never experiences that turbo ''boost'' that I got before.

I have looked into the engine and I think the pipe that goes from the intercooler on the right side up to the engine has a little split in the corner, would this cause it?

Bear in mind, this is around the right side of the engine and the turbo is on the left, so I only think its coming from the intercooler up to the engine. It is quite a long pipe but this specific section is a corner section.

This is not the same engine but the green pipe is it I think

https://i.ebayimg.com/images/g/CSYAAOSw8i9aYL7F/s-l1600.jpg
 
The pipe in question is after the turbo so it would lose boost and cause a lack of power. Is there a whoosing sound when you accelerate? New to Fiats but had the same issue in the past with X-type Jags, they used to split inter cooler hoses for fun.
 
dmcsweeney said:
The pipe in question is after the turbo so it would lose boost and cause a lack of power. Is there a whoosing sound when you accelerate? New to Fiats but had the same issue in the past with X-type Jags, they used to split inter cooler hoses for fun.
Click to expand...

The is a very small whooshing sound, but there was more before when it actually worked. What I *think* I can hear though is hissing of air if I have my passengers window down and accelerating past 1500rpm. This could be in my head though, what isn't in my head is the 1 inch small split in that hose though :eek: Also, the lack of a turbo kick at 1500rpm is unmistakable
 
There's your problem. It doesn't take much of a split and that sound indicates boost loss. I tried a patch for a puncture repair kit as a temporary fix on one of mine while waiting for a hose but it forced air out past it that sounded like flatulence under boost so that came straight back off :D
 
Sorry to threadjack, but dmcsweeney, is the sound you're talking about like the one in my old thread?

https://www.fiatforum.com/bravo/472692-bravo-stutter-slipping-sound-what.html

Mine's been off the road for months while I've been making repairs to my life and my brakes, so never did get this properly investigated. Last theory was boost leak though. 2/3 gear under moderate acceleration, accompanying loss of power with every sound. Quite difficult to make it do it though.
 
That's a strange one. A boost leak isn't really intermittent, should occur in every gear, and you'd normally start to hear it from around 18/2000 RPM as the turbo starts to spool up. I'm new to working on Bravos (have the wife's one less than a week) and I'm basing my advice on my experience of the same problem on X-Type Jags and a E320 CDi I worked on in the past. Unless there is a boost pipe that is stretching and leaking under certain conditions as the engine/box move on the mounts?
 
Not a clue... seems to have stumped everyone so far. Only thing I can think to try is to plug it into my laptop and watch what it's actually doing when it's making that noise, or disconnect the chip that's on it (no idea which brand as all its stickers have faded to white). Anyway, better not hog this thread any more. I was hoping it'd be related to barry's problem so we could compare notes, but never mind!
 
I have fixed the boost leak issue and cleared the codes.

Unfortunately the car is basically the same, there is no turbo kicking in anymore from what I can feel.

One code that does popup again even after clearing is the dpf not cleaning code, but I presume that will go once I can get the boost returned and the revs actually go up again!

Any ideas?
 
One (bad) possibility is that your blocked DPF may have damaged your turbo and caused the leak in the first place from back pressure. Do you do motorway runs with it? My instinct would be to suggest you get MultiECUScan hooked up to the car and get a really clear idea of what it's doing: when it last did a DPF regen, the exact code etc. then look into whether an active regen could clear the problem. Even if it does, it may have gunged up your turbo or made it overheat/oil leak.

If it were my car I'd be tempted to see if I could make it regen, then if I couldn't, I'd pull and inspect the turbo and take the DPF off and flush it out manually, as I know people have done that with a completely blocked DPF rather than pay £1000 to swap it for a refurb. Fortunately whoever chose the options on my 1.9 MJet decided they didn't want the hassle, so it doesn't have one. What's bad for everyone else's lungs is good for me.

Btw I'm pretty new to messing with cars though so don't actually DO anything on my advice without getting some more experienced opinions first.
 
Last edited:
thesmallprint said:
One (bad) possibility is that your blocked DPF may have damaged your turbo and caused the leak in the first place from back pressure. Do you do motorway runs with it? My instinct would be to suggest you get MultiECUScan hooked up to the car and get a really clear idea of what it's doing: when it last did a DPF regen, the exact code etc. then look into whether an active regen could clear the problem. Even if it does, it may have gunged up your turbo or made it overheat/oil leak.

If it were my car I'd be tempted to see if I could make it regen, then if I couldn't, I'd pull and inspect the turbo and take the DPF off and flush it out manually, as I know people have done that with a completely blocked DPF rather than pay £1000 to swap it for a refurb. Fortunately whoever chose the options on my 1.9 MJet decided they didn't want the hassle, so it doesn't have one. What's bad for everyone else's lungs is good for me.

Btw I'm pretty new to messing with cars though so don't actually DO anything on my advice without getting some more experienced opinions first.
Click to expand...

That is an interesting thought but I don't know if that is it. The reason I say that is the engine management light came on, I would estimate, about three or four days after I noticed I had lost power and had a leak in one hose. Thus, any of my driving since then has been sub or at 2000RPM due to the lack of turbo. So I presume the DPF being somewhat clogged makes sense.

I have done the manual DPF regen in the mecu tool alright. Unfortunately, I have eh, lost my copy and I cannot seem to find it. I will keep trying though ;)
 
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