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4.2 diesel patrol motor rebuilt 60000 km ago new injector pump after market turbo 3 inch exhaust has flat spot before changing gear blows black smoke changing fuel air filters makes no difference

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Turbo problem-check actuator to change blade angle in the exhaust side to the turbo that assists with directing exhaust gas flow onto the turbine wheel
could be problem vacuum vose or control module

Posted on Apr 15, 2017

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2005 diesel smart car starts then dies after a few seconds. changed pump. fuel filter, pressure sensor, cleaned air intake including turbo. Has good fuel pressure. cleaned injectors, have good spray.


black smoke = excessive fuel = bad injector tips , low injector pressure , turbo not working properly
take the car to an accredited diesel specialist professional for a pump pressure and injector pressure test, injector calibration and tip replacement

Sep 16, 2017 | Smart Cars & Trucks

1 Answer

2006 KJ Cherokee 2.8lt turbo diesel manual. When I accelerate engine surges then flat spot then surges again as it accelerates there is also a lot of black smoke coming out of the exhaust pipe


There is a waste gate on a turbo and that gate dumps the excess pressure in the manifold. There is a sensor that determines when the gate opens and closes. You need to run a diagnostic scan and see what the waste gate and sensors are doing.

Jan 28, 2017 | Cars & Trucks

1 Answer

My patrol is blowing black smoke just had new turbo and head has lack of power what is the problem?


Hi Stephen:
Black smoke is an indication of unburned fuel.
I would be suspicious of injector pump or valve timing.

Dec 02, 2015 | Cars & Trucks

2 Answers

I've got a Peugeot 407 HDi 2005 now with a power loss, particularly obvious in low rev range, blowing black smoke - looking like excessive fuel input. Also, it is using a huge amount of fuel.


Is it a diesel. If so it could be the particulate filter blocked, or it could be a failed fuel pump or something internal of the pump, or if a petrol it could be a failed catalytic converter, undo the exhaust and see if that changes, if so then look closely at your exhaust.

Dec 24, 2014 | Peugeot Cars & Trucks

1 Answer

Delica diesel '98 space gear 2.8 turbo diesel. We are second owner 180,000 km. Problem is black exhaust when first starting up and then once accelerating between 80 to 100 km/ph no smoke. When decelerating...


I think you have leaking injectors, after shut off raw fuel dips into cylinders and then on start causews the black smoke unitil it is burned off. Any dealer has the equipment to leak test the system.

Feb 19, 2014 | Cars & Trucks

1 Answer

Audi q7 black smoke coming out of exhaust


The reason my audi q7 had heavy smoke was because the diesel fuel injectors were dripping which can be checked by means of a leak test, this was caused by the fuel injection pump depositing micro shreads of metal in to the injectors, 5 of which failed.
If you're problem is the same, you will find that the problem occurs when the engine is hot, when the engine has been ticking over for a short period and then you hit the accelerator the heavy smoke is the excess fuel burning off, equally if the idle period is longer you will notice smoke in you're rear view mirror. Audi are well aware of the common engine faults, proof being in the 3 years or 60000 mile warranty, the only top motor brand that don't offer 3 years unlimited ( Bmw, Merc, lexus, hell kia & hyundi have more confidence), you may think I have been unlucky and landed a bad one, I bought a second one as i thought the same which low and behold i had full injector replacement and £1800 turbo fault. each car developed the faults between 63000 & 77000 miles, if you buy a second hand diesel audi with a 3.0 engine or above you are buying the name not reliability which is proof when you look up audi's on autotrader, there isn't many with more than 150000 miles, the same can't be said about BMW & MERC which have there cars with 250000 plus.

Jul 31, 2012 | Audi Q7 Cars & Trucks

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2005 Ford F250 6.0 turbo diesel blows black smoke out exhaust and has no power when I try to excellerate.


1. check charge air tube,loosing boost pressure=low power and black smoke
2. check for air filter restriction,if it cant breathe it will blow smoke and run like ****
3. check for rotational drag on the turbo compressor wheel, it may be locking up causing low power and black smoke, much like cummins vgt turbo
4.oil quality,poor oil quality, ie long intervals between oil changes.
5. may have a leaking injector, not common with this style of injector but i wouldnt rule it out if nothing else checks out.....hope this helps.

Jul 21, 2012 | 2005 Ford F 250 Super Duty

2 Answers

Problem starting my mazda bt50 3.0 turbo Diesel 2007. had new injectors 6 months ago


Hi I have a problem, to start my 2010 3 liter mazda bt50.
I change the fuel pump but still the problem didn't solve

Feb 22, 2011 | 2007 Mazda B Series

1 Answer

Detroit diesel injector installation


thoroughly clean area around injectors,and then blow with compressed air so no bits will fall in the holes when injectors removed.loosen main injector pipe nut,remove return fuel line,dont lose copper washers,put special fuel bolts back in top of injector firm[by hand] undo holding down bolts evenly,undo fully injector pipe nut,.gently pry injector loose,and remove,making sure sealing washer at bottom also comes out..while I dont specifically know this particular engine,this guide applies to most diesel motors.I have rebuilt a 6v72 detroit motor,yrs ago.Assembly is reversal.may need to crank over to bleed diesel at injector,always use new sealing washers.

Jul 01, 2010 | 1990 Mercedes-Benz 300 Diesel

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