Before removing your EGR it's worth understanding what it does and why it is fitted. Exhaust Gas Re-circulation occurs during light engine load, it's purpose is to reduce NOx emmissions. Hot gases from the exhaust are vented back in to the intake of the engine instead of fresh air with a higher oxygen content.
This hot exhaust gas actually acts in a similar manner to an inert gas under combustion. The inert gas causes a reduced cylinder temperature and also a reduction in peak cylinder pressure. The result of this is that less oxides of Nitrogen are formed during combustion (NOx).
The down side of exhaust gas re-circulation is that there is a slight trade off between fuel economy and NOx emissions. With EGR fitted an engine is actually slightly less efficient. To add to this car manufacturers also retard injection timing slightly as this also helps to reduce NOx. Again this has a negative effect on fuel economy.
Why remove the EGR?
Many HDI owners choose to remove the EGR not for the small economy gains, but actually as a preventative measure (or to fix an EGR fault). At some point in your car's life it's likely the EGR will begin to cause a problem. Sometimes the inlet manifold can clog with dirt thanks to the dirty exhaust gases entering the engine, alternatively the EGR control solenoid can break causing 100% EGR at all times which will cause a large power loss and un-even running.
With EGR removal you should notice a slightly better pick up, this is thanks to a greater mass flow of clean air through the engines air flow meter, normally fresh air intake would be slightly reduced when air is diverted through the EGR system.
Is it worth disabling the EGR if there aren’t any problems with it currently?
This is entirely up to you, however it’s likely the electro valve will go wrong at some point in your car’s life and cause an EGR fault, so you may as well remove it as a preventative measure. You’ll also notice better pick up and slightly better fuel economy with the EGR removed. If you want two files, one with and one without EGR please request this when we are making your remap.
Took my 306 here today that required more power 😇🙈 all I can say is what a fantastic job he has done. the car has so much more power 😍. He also diagnosed issues that I wouldn't have found. thank you for your 5* service. highly recommended.
I had my peugeot 207 90 HDI mapped for VNT turbo by Steve. The car runs faultless and moves pretty quick. The online service it s very fast, comprehensive and at the right price!
Had my Peugeot 307 136bhp remapped to 170bhp using a BDM100 tool and the online remap service - files were sent back to me the same day which I was very impressed by. Support/service throughout the whole process was excellent, including the DIY guides on how to read/write the files from the ECU. My antipollution system warnings are now a thing of the past and the map itself is great - the car pulls hard right up to the redline now, it's like a totally different engine and I'm quite surprised by how fast the car is now. Well worth the money, I wouldn't hesitate to recommend HDI Tuning.
Great fast service, very knowledgeable, my ds3 1.6 diesel runs so much smoother and faster after it’s remap. Highly recommend this company.
What can I say. I had my 307 90hdi tuned by Ste and he’s done an amazing job it literally means just that.he has brought a whole new meaning to a new lease of life my 307 has never felt this good from 90bhp to just over 125bhp at 275Nm it has become a new animal I would highly recommend he to any one who needs there HDI engine kicking up a notch. 5* service and not to mention he managed to booked me in with in less then a weeks notice. Thanks again mate will be happy to do business again :)
Just had my 206 1.6 hdi remapped with the egr and dpf delete and it's made one hell of a difference. Having egr issues before hand has made the remap even more of an improvement. I defintly recommend HDI Tuning as Steve is great at responding to emails and has given me brilliant advice on what to do to ensure the remap works as it should. Thanks again Steve you have defintly left me with a big grin on my face and wanting to drive the car at every given opportunity.
Remap done by Steve. On hand advice and a wealth of knowledge. Put simple the guy knows his S#*T. After remap had an unrelated fault and Steve was able to diagnose over the phone and it cost me a fiver to fix myself (actually about 50p of vac pipe) but I got plenty left. Cheers HDI Tuning.
Peugeot Expert 90bhp (sluggish), remapped with a Stage 1 Ecu 120bhp (lively). After numerous emails and phone calls to Steve about questions on the Stage 1 Remap I was always put to ease by Steve's quick response, reassurance and honesty. I cannot add anymore to Steve's attitude and personality towards his customers than what everyone has already written. Now after installing the remapped ecu the van started up as normal and everything ran as normal. I took it down the bypass and it just felt a lot lively and lighter.
Had a 1.6D 2011 Volvo S80 throwing up errors from turbo and EGR valve. Car was way down on power and economy. Left it with HDI Tuning for a few days for some work and a remap and the car is more powerful and more efficient than ever before! Previously it would stick around 50MPG on runs of 70-75 mph, now it has just managed over 1000kms to a tank and an average of 58.1MPG. The car has good pull through all gears and emissions do not appear to have changed at all. Delighted with the results!
Steven is a top chap. Sent the files for my Suzuki Vitara via email and totally transformed the jeep. More torque across the whole rev range and gained about 10 mph on top speed. Total value for money. My brother in law is now ordering the same service the day I done mine! 5 star service and 5 star MAP. Thanks again Steven :-)