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For those you that have fitted a BMC CDA to a 1.9 JTD I am wondering was it worth the approx £170, what performance difference did you notice in real world driving and what difference did it make, if any, to the noise of the car?
 

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In my opinion it is worthed.

In terms of performance, you will get faster spool up times of your turbo...meaing you will have faster response from the engine.

Also it will flow a little more air compared to the stock air filter...which will keep your turbo happier compared to the stock air intake...and you might get a few hp in top end...some torque will also be gained.

To the noise...the car will be a noiser for sure...BUT nothing like N/A petrol cars...so don't be scared off. You will simple hear your turbo more :)

The real problem with the BMC CDA on your car is the space to fit it....it is really small.
 

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You can still use the old remap, as the ECU on your car sees the intake temp. in the intake manifold (JTDm from what I see in your profile) so it sees the real temp. going into the engine and "takes" the FMIC into account :)

BUT in my opinion it would be better to make some fine adjustments to the remap, as the CDA and FMIC will allow a little more boost :)
 

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he will NOT get limp home mode if everything is in working order on his car.

IF his solenoid valve (the one controling the turbo) is on its way out, THEN he can get overboost problems with the BMC_CDA which will results into safe mode.
 

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he will NOT get limp home mode if everything is in working order on his car.

IF his solenoid valve (the one controling the turbo) is on its way out, THEN he can get overboost problems with the BMC_CDA which will results into safe mode.
Also depends on how the car is mapped the first place.
 

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Where is the intake maifold temperature sensor on JTD 16V? I thougt that it only measures intake temperature before the turbo in the MAF and then calculates the manifold temperature from pressure and air mass flow...

I'm actualy not really satisfied with my current remap because car smokes after 3500 rpm... and if it is really hot outside even at lower rpms...
My "tuner" tried to fix it but he couldnt. And then said that there must be something wrong with the car but he couldnt tell me what.
We checked MAF, EGR, turbo pipes and IC... only MAF was a bit greasy inside... everything else is OK...
I guess I will have to change my tuner not the car...
 

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I think that on 16v JTD intake temperature is measured by MAP sensor which is located in intake manifold and has 4-wire connector (ground, 5V, pressure signal, temperature signal). On 8v JTD temperature is measured by MAF and in that reason 8v JTD has MAP sensor with 3-pin connector (ground, 5V, pressure signal)...
 

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What Dusan wrote is correct.

But the 16v JTD takes the reading from both...MAF and MAP....but the more important one is the MAP

@TribesMan,

If your 147 is the 150 version, you can get about 190-200hp with very, very little smoke...almost none. We have done a few of these and all of them now have also the Q2 :)
 

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Thank you kgb for the corrections... I had a wrong information about 1.9 JTD 16v... Best regards from Dusan.
 

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kgb, yes mine is 150HP, but not "JTDm" it is "JTD 16V multi-jet" (I should edit my profile), so I think 190 is a bit too high for this engine. ;) After remap I got 180BHP and 370Nm... but it smokes, which I dont like.
And I'm also not very satisfied with low end torque. I expected more "punch" in the low revs, and maybe a bit faster turbo spool up... but everything seems "the same" on the low end, there is quite a difference in high revs, engine just pulls and pulls over 4000rpm easily, much better than before.
Performance has definetely improved 60-100mph in 5. gear has dropped from 16.9s to 12.8s (measured with racelogic driftbox), but everything is so annoyingly "linear", almost like driving NA engine...

And the smoke. If it is cold outside (below 10°C) it is quite bearable, it starts to smoke just a bit when you push it over 3500rpm. At 15°C the smoke is quite noticeable over 3500, at 20°C it starts to get annoying... But if it is over 30°C you get smoke screens every time you boot it... nasty.
And my tuner insists there must be something wrong with the car... but I think it could be the other way around :D
I also had Q2 fitted along with uprated clutch...
 

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Check your EGR valve and clean it...then have a real hard driving for about 10km and see if the smoke disappears.
 

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I checked EGR and it looks very good/clean to me. There was a really thin layer of soot on the walls of EGR valve. I removed the electromagnet part form the valve and both are moving freely... no sign of blocked EGR.
I did quite a lot of hard driving also... but it does not make any difference at all.

I will check the MAP sensor today, to see if it is clogged. When we connected the OBD examiner and went for a spin manifold pressure was reported at ~1 bar at idle and around 1.5 bar at full throttle from 1800 and up to 4200rpm, so everything seems quite normal.
 

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I have just removed the MAP sensor... and it does not look good... sensor is covered in thick layer of soot+oil mix... very hard to remove. I tried to scratch it off but it sticks "like **** on velcro". Should I wash it off with gasoline or alcohol? Or could that damage the map sensor?
I measured resistance of temperature sensor in the MAP. It reads around 2.5kohm on room temperature, and if you blow warm air to the sensor the resistance drops below 2kohm...

I think there must be lots of gunk inside intake manifold... is there an easy way to open and clean intake manifold?
 

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Tribesman - I had this bother with the oil/soot mix inside the inlet manifold of my old 2.4 10v. Long screwdriver with a rag on the end got a lot of it out, then a dose of Ecotek PowerBoost cleaned up what was left. Restored a fair bit of lost power too, the first time I used it.

Watch out with scraping inside the manifold on yours though, I think you have swirl valves and you don't want to damage those. A water/meths injection kit will keep the inside of the inlet manifold shiny, jbsmith has one fitted to his diesel Brera (268bhp).. :cool:
 

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Well I took a bit of a gamble and I cleaned the sensor in gasoline, reasembled it and went for a 20km drive.
But nothing has changed... It still smokes when you push it, maybe just a bit less (probably just a psychological :))
Now for the mainfold cleaning... I guess I should remove EGR and butterfly valve to gain partial access to the manifold?
 

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I cleaned mine through the throttle body, there is no throttle butterfly and just opens up once you get past the neck. Was very easy, not sure if the 16v is the same though. With the rag and screwdriver I got out enough solid stuff to 3/4 fill a jam jar.. :wow:
 
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