Recent Topics
A4 2_5 TDI 2002
KEITH DA COSTA
10/12/09 at 09:16
Escort 1-8 TDI 2000
KEITH DA COSTA
07/12/09 at 09:21
Freelander II
KEITH DA COSTA
11/11/09 at 15:53
Nissan Primera 2_2dCi (2184cc) 2002
KEITH DA COSTA
11/11/09 at 09:59
Hyundai Tucson 2_0 CRDI 2004
KEITH DA COSTA
06/11/09 at 09:14
THURSDAY, 10 DECEMBER 2009
A4 2_5 TDI 2002
Hi. I have a 2002 Audi A4 2.5 tdi. It has recently become very sluggish on accelaration and tends to put out a fair bit of black smoke when i accelarate hard. Would this simply be caused due to dirty injectors or is this a bigger problem? Is the cur smething that I ould do myself or is it a job for a mechanic?
Thanks
Ian
Posted by KEITH DA COSTA at 09:16 | 6 COMMENTS
Comments
Monday, 19 April 2010, Keith Da Costa wrote:
Dear Alan,
Your problem might not be with the pump but rather with something else within the fuel system.
Pressure loss within a common rail fuel system can often result in one or more of the following symptoms, hard or difficult starting / erratic or uneven tick over or idle / lumpy running / hesitation on acceleration / smoke on tick over or acceleration / lack of power or even a total shut down of the system. One of the main reasons for pressure loss is due to faulty diesel injectors. To conduct a Common Rail Injector Back Leakage Test go to http://www.uniteddiesel.co.uk/tips-troubles.php
You can also check if you have a pressure regulating valve on the rail.
Personaly I would check the backleakage from the injectors first.
I hope that this helps, let us know how you get on.
Regards,
Keith
Posted at: 13:05
Monday, 19 April 2010, Alan Adderley wrote:
Hi,
I have a starting problem with my 2003 Peugeot 206 1.4 hdi, i will give you a brief history of the problem
Car would not start one evening so call the AA who said it had run out of diesel although it was showing 1/4 tank of fuel, fuel was added system primed and all was ok, next morning no start again, AA called system primed and all was fine, so it was decided that air was getting into the system so the fuel pipes were changed but now car would not start even after priming, there was no air in the system. A new fuel filter and battery were put on but still no go unless a bump start was possible or easy start was sprayed into the air intake
i was then told the diesel pump start pressure was not sufficient so a second hand pump was fitted still no go unless bumped or easy start was used i was then told that this pump was also dodgy, so do you think a reconditioned unit could fix my problem or is there something else that we are missing
Regards Alan
Posted at: 12:38
Friday, 9 April 2010, Keith Da Costa wrote:
Hi Sean,
A leaking pump should not cause black smoke, if the system is low on fuel pressure I would have thought that you will have difficult starting and uneven running. It would be a good thing to check the EGR valve. Other things will need checking.
Air filter is clean and EGR valve is working and not stuck. I would check the EGR valve first.
Air flow meter is ok.
Turbo waste gate is not stuck.
It seems that you have an air to fuel ratio imbalance so you need to be sure that the engine is getting enough air.
I hope that this has helped and not confused you any more.
Thanks,
Regards,
Keith
Posted at: 11:38
Friday, 9 April 2010, Tulla wrote:
Hi: I have a 2003 VW Passat TDI 130 BHP. I recently had to replace the engine and have had a number of problems since. The main one is that on acceleration I get clouds of black smoke and have significantly reduced mpg. There is a leak in the fuel pum which my mechanic attempted to repair with sealant rather than replace the gasket! I took it to another mechanic who said he would need it for a week and would also need to replace the EGR valve. Could the leaky fuel pump cause low fuel pressure and be the cause of the black smoke? Would welcome your comments. Sean
Posted at: 11:02
Friday, 15 January 2010, smifnsmif wrote:
Hi everyone. Just felt I had to leave a comment about the incredibly efficient and friendly service provided by this company. I contacted Keith exactly a week ago as I had serious blowback on at least one injector on my Chrysler Grand Voyager. Although it was far from a huge money making job for Keith, he posted the replacement seals/washers by first-class post and I had them the next day. My vehicle is now fixed and running well. I dread to think how I would have been treated by a main dealer if I had approached them for the same items and advice. It is a breath of fresh air in this dog-eat-dog world to find such a friendly and efficient company. I will be back for sure, and will be sure to recommend to anyone.
Best Wishes.
Dave.
Posted at: 11:43
Thursday, 10 December 2009, Keith Da Costa wrote:
Hi Ian,
You have not given me the milage but injectors do need attention at about 100000 miles. Faulty injectors will cause black smoke and a slight loss in power so it depends on the power loss you are experiancing.
Other things to check are,
One of the injectors is a sensor injector (has a wire going to it) check that the resistance is between 90 and 110 ohms.
Air filter and EGR valve are clean.
Air flow meter is ok.
Turbo waste gate is not stuck.
It seems that you have an air to fuel ratio imbalance so you need to be sure that the engine is getting enough air.
I hope that this has helped and not confused you any more.
Thanks,
Regards,
Keith
Posted at: 09:25
Post a Comment
You must be registered to post a comment, please Login or Register