BMW N47 Diesel Fuel System Replacement

Another BMW 1 Series recovered to us not starting. Cranking over but engine not firing. Vehicle in the workshop on the diagnostics it was clear we had a fuel supply problem causing the engine not to start. On the live data we could see no high fuel pressure inside the rail, before going to the injectors. Suspecting high pressure fuel pump failure we removed the fuel rail to inspect for swarf – small metal parts inside the fuel system.
As expected swarf present in the system causing damage.

Once this occurs it is good practice to replace all components on the high pressure fuel system. Along with throughly cleaning the low fuel pressure side – fuel tank, lines and filter replacement.

Unfortunately new fuel system components would write this vehicle off being several thousands of pounds. However we have great suppliers of used parts (or green parts as they’re sugar coated as) that can supply us with complete used kits of the high pressure fuel system, with a 3 month warranty. Allowing us to repair at a fraction of the cost, keeping this car on the road

Alternative solutions to repair vehicles cost effectively.

Fault investigation and diagnosis

Used Engine ECU Cloning Replacement

An Engine ECU – DME/ DDE as BMW call it, monitor and control the running of the engine. Unfortunately these can fail for various reasons. Most common is water damage, however internal faults causing misfires, incorrect sensor readings, or even a non start. This means the ecu requires replacement.

A new unit is usually expensive in the thousands, which can write off some older vehicles. Buying a used unit, you cannot simply plug into the vehicle and expect it to start, as programming and immobiliser codes set in the software will prevent this from being possible.

 

Fortunately we have specialist software & equipment allowing us to ‘clone’ transfer the data inside the original unit into a used donor unit, thus allowing it to be compatible with the vehicle, enabling it to start and run like the original (without the previous running faults).

If your BMW or MINI is at the dealer with an eye watering sum to replace a component. Give us a call to see if we can help

Fault investigation and diagnosis

BMW & MINI Remote key

If your vehicle requires a new replacement remote key. We are able to provide an aftermarket replacement. Making a saving than ordering a new key from the dealership and having to wait for it to arrive from Germany.

Programmed in house to your vehicle in one day! (BMW & Mini only – Excludes cut key blade)

Please note we are currently booking 2 months in advance at present for all work.

BMW and Mini remote key replacement

BMW & MINI FRM Repair

The FRM – Footwell module, fitted to various BMWs & MINIs between 2005 to 2015.

This unit controls the light and window functions on the vehicle.

A known problem with this unit is corruption of the data inside after the vehicle battery has been disconnected or connected to diagnostic equipment. Which then stops communication to the unit. The driver will notice no vehicle lighting or function of the power windows.

A few years ago the only solution was a new replacement unit at around £500, making it a costly repair.
However we have specialist software & equipment that allows us to repair the corrupted data of the original unit, saving the unit and more importantly money, at an hours labour of £72 inc vat. That’s more like it!

So if a garage has reported your FRM requires replacement, please get in touch, we will see if we can help!

BMW and Mini ECU repair

Vehicle Servicing under warranty

A couple of high power BMW 1 Series recently in the workshop for their first services, after 2 years if the mileage has not been covered.

Using genuine bmw & mini parts to maintain the manufacturers warranty, along with updating the service history database and loading on to the I-drive

You do not have to take your car to the dealer to be serviced whilst under the manufacturers 3 year warranty, so please don’t be told otherwise! You’re free to service where you wish using genuine parts at a vat registered garage!

Please note we do book approx. 6 weeks in advance. So please book as early as possible
Thank you to everyone for their custom!

Our BMW Servicing

https://www.goodgaragescheme.com/

 

BMW M4 All round Brake pad & disc replacement

We had the pleasure of having this stunning BMW F82 in for all brakes replacement. The brakes weren’t due to be replaced but the customer didn’t like the wear and corrosion to the discs. And quite rightly so they didn’t look great.

As with all our brakes replacement we thoroughly remove the corrosion build up from the hub and wheel faces to prevent brake pad pick up causing disc warping.

Along with carrier and slider cleaning, then high temp grease to the brake pads to ensure free movement for miles to come.

We look forward to seeing this motor again in the future!
(If anyone can find the issue in one of the pictures that we needed to rectify before putting the new discs on please comment. If correct you’ll receive a virtual pat on the back!)

BMW M Model Servicing

 

BMW 320i Engine hesitation/ jerking under acceleration… fixed

A recent BMW 320i with the B48 4 cylinder petrol turbo engine with us. Fault of hesitation/ jerking sensation under acceleration. This car had been to a garage and bmw dealer previously but unable to locate the fault.

Road tested vehicle to confirm the fault under acceleration. Fault codes showing the engine is running too lean. Which means there is too much air going into the engine (or so it thinks) to fuel expected detected by the ecu using the various sensors fitted.

A fuel tank breather valve had been fitted previously by the bmw dealer, which is a known fault on this engine, but did not resolve the fault.

Using the bmw diagnostic system makes our job much easier to locate and rectify faults but it’s not always the silver bullet.

Using the diagnostics we ran through several air to fuel mixture tests. All passed ok but this is with the car stationary in the workshop. This fault only occurs whilst the engine is under load/ acceleration on the road. We then smoke leak tested the intake system, pipes, manifold, etc. No smoke present proving the intake system is tight and no allowing any extra air into the engine. Moving onto the turbo and exhaust and no smoke/ leaks either.
With the fault not showing in the workshop we took the computer on the road with us to inspect the live data readings to see if we can see any abnormalities to locate the fault.

Air mass, intake manifold and fuel pressure sensors showing plausible readings to the specified requirements. It took a while to locate as the fault was intermittent under acceleration. But eventually we found the oxygen sensor reading would go lean the same time as the hesitation/ jerking sensation. Upto 1.81.
Unfortunately the bmw diagnostics live data readings are not easy to read when they are changing quickly. So we grabbed the Bosch diagnostic system where we can graph and record the live data to easily read our findings.

The oxygen or known as a lambda sensor is located in the exhaust, either in the manifold or after the turbo if one is fitted. The sensor does what its called and measures the amount of oxygen present in the exhaust exiting the engine. A lean condition means not enough fuel so the ecu will then injector more fuel to compensate. Then a rich condition means too much fuel, the ecu will then inject less fuel. This is constantly monitored and adjusted to try to reach lambda 1. The ‘perfect’ air to fuel ratio.

As we could see from our sensor it would intermittently spike lean at 1.81. Rather than smoothly adjusting around lambda 1.
Next was to test the sensor & wiring directly, as an oxygen heater fault was also stored previously. All circuit tests passed ok. With the sensor removed we could visually see the engine/ exhaust gas is in a lean condition, with the sensor tip being white in colour.

With all other systems tested without fault to cause a lean condition. We suspected the sensor had an intermittent internal fault.
With the oxygen sensor replaced, vehicle software level updated & adaptations reset. We road tested the vehicle and it now drives as it should.
Tried. Tested. Fixed.

Fault Investigation – Diagnosis

 

A couple of BMW i3s recently visiting the workshop

First i3 was dropped off to us as the car would not charge displaying a fault when charging, with only 1 mile remaining they were glad to make it to us.

Upon investigation we found the faults stored showed no air conditioning gas pressure along with high voltage charging faults. The importance of the air con system working on electric and hybrid vehicles as it not only cools the cabin, it is also plumbed in to cool the high voltage battery packs. So without the air con working, the vehicle will not charge to prevent possible overheating of the battery.

With no air con gas present in the system. We carried out a nitrogen gas test to locate the leak from the condenser at the front. With the condenser replaced and air con system re-gassed with the newer 1234yf gas, all faults were cleared. The vehicle then left to charge overnight to full correctly. Road tested and returned to the customer

Second i3 was much more straight forward. Full service as this version had the range extender (or an engine if you don’t like stupid bmw terminology).

Engine oil, pollen filter, air filter and spark plugs replaced, with a brake fluid change.

Service history updated on the BMW Database then uploaded on to the iDrive, same as the dealerships! Job done

All our Technicians are IMI Level 4 Hybrid & Electric Vehicle trained & qualified so you can be sure your vehicle is in safe and capable hands. You’ll be shocked by what we can do. More information about how we can help with your electric and hybrid cars.

Used BMW 8 Speed Auto Transmission Replacement

A recent repair with us, BMW F10 5 Series with a very broken 8 Speed Auto Transmission. Only course of action was to send away for reconditioning or replacement. A new transmission was £12k, recon was £3k. With the age and mileage of these models getting on a bit now, the only sensible option without writing the car off was to source and replace with a used transmission.

However, with these EGS ZF 8HP Transmissions, BMW have kindly placed the Immobiliser (EWS) inside the transmission control unit. Meaning if you fit a used box to the car, it will not go into gear/ work at all. Even with genuine bmw software it will not overwrite the immobiliser code.
Which is why here at Burch Motor Works we have the genuine bmw software and various aftermarket software programs to allow us to work around these issues.

We reset the immobiliser code to a factory state using our aftermarket software, then programmed the transmission to the vehicle…. take that BMW ?
Finishing off by replacing the transmission fluid & filter pan. Road tested vehicle now driving like the ultimate driving machine again… at a fraction of the cost!

We have all the gear, and hopefully some idea to save you money on your repairs… you’re welcome ?

View our Software update and coding services 

Swirl Flap Removal & on Car DPF Cleaning

This customer was glad they returned their X5 back to us for an MOT, intake swirl flap removal & DPF Forte Power Clean.

During a service a few months ago. We upload the service history from the BMW Database into the vehicles I-Drive. At the same time we always check the vehicle fault codes free of charge during the service and report to the customer if recommended attention is required.

On this occasion we noticed engine fault codes for swirl flap movement & DPF high back pressure. The Diesel N47 engine in this model is prone to the intake swirl flaps becoming stiff in movement from carbon build up or worse wearing on the shaft causing them to fall off going into the engine combustion cylinders. Causing large expensive damage writing off the engine and in some cases the vehicle!

As a result of engine fault codes stored being present. It can prevent the engine ecu from regenerating the DPF – Diesel Particulate Filter of its own accord, causing it to block over time.
So we recommended on their next visit we check/ remove the intake swirl flaps and carry out a Forte DPF Power Clean, the most cost effective method to clean/ repair your a DPF.

As you can see from the pictures, the customer was very lucky. Cylinder 2 swirl flap had fallen off completely and luckily was too large to pass the intake valves and was sat in the intake port. Cylinder 4 was ready to fall off with the other two loose!

So we removed all swirl flaps, rod & blanked the rod hole with a bung. Along with manually removing as much carbon build up as possible.
For regular maintenance we recommend the Forte Intake System Power Clean which would soften & break down this carbon build up on the engine intake manifold and valves.
Once rebuilt we carried out the Forte DPF Power Clean to bring the exhaust back pressure levels low, well within spec so it will now regenerate of its own accord once again.

So you can see the benefits of using a Specalist Garage with experience, expertise & equipment to maintain your BMW & MINI with cost effective solutions!
Please visit our website to see the services we offer. If you think we could help you, please get in touch!