Frequently Asked Questions

The effect of the service depends how dirty it is to start with (which depends on how it has been driven, the quality of fuel used, how many miles on the clock and age of the car).

Imagine a car wash, i.e. dirty car in = massive benefits, clean car in = no real difference.

• diesels
• high mileage cars
• cars never/rarely driven hard as they never get hot
• taxis and buses are worst as they are sat idling lot of the time with lots of start-stop driving.

• smoky exhaust
• louder rumbly engine and lumpy idle
• flat spots or car feeling sluggish (reduced throttle response)
• increased emissions and reduced MPG
• DPF and EGR valve issues, swirl flaps sticking, throttle body sticking, turbo vanes and waste gates etc. getting sooted up

So cleaning out the carbon combats and reverses the above.  But it’s all about what you’ve already lost and getting it back, not adding or improving like a modification would.  Carrying out the service on a new/clean car will produce little difference. You don’t really notice on a day-to-day basis, but it builds up over time.

 In order to perform the clean, we need the engine warmed up (ideally driven) and also enough room to position our vehicle close enough to attach a hose from the unit to the air intake of the engine.  Our generator is electrically powered so a nearby electrical socket is required, although some agents do utilize a portable gasoline generator upon request. 

Upon arrival we check the engine for any obvious noises or signs that we ought not proceed with the clean, e.g. leaking oil/coolant, noisy turbo (failing mechanically) or noisy cats (failing mechanically), engine management lights, error codes or any other issues and record them on the job sheet.  We perform a general health check of the engine by starting the engine and revving the engine through the rev range a couple of times (revving exercise) and then holding the revs higher than idle for approx. 20 seconds.  This also allows us to gauge the levels of carbon in the engine already by ear and also feel the throttle response for any graininess, hunting at idle or flat spots.

We then ask the owner to fill in and sign a work sheet prior to commencing the job.

We then turn off the engine and connect the pipe to the air intake(s) of the engine.  The hydrogen and oxygen gas is fed into the air intake of the engine through a pipe.

• After the air filter(s)
• After the MAF sensor(s) if present
• The intake is sealed around the pipe using duct tape. This is ideal for creating a temporary seal as it adapts to all vehicles and is not a permanent measure (we would not advocate the use of duct tape for permanent vehicle repairs).

We then repeat the revving exercise to ensure we have a tight seal around the pipe.

We then turn on the unit and let the engine idle for a minimum of 30 minutes.  Every 10 minutes during this time we will repeat the revving exercise until the engineer is satisfied the job is complete.

The technician will then disconnect the pipe and reseal the air intake.

The process will be the same as the above on all engines unless there is a rev limited at standstill. If the rev limited cannot be bypassed and the rev limiter is sufficiently low enough in the rev range then the system may not be hot enough to clean properly. As such the engineer may at his discretion choose to split the clean into two parts, punctuated with the owner having to take the car out for a very short ‘spirited’ drive in between.

The hydrogen and oxygen gas enter the car through the air intake.  The Hydrogen and oxygen gas burn with a much higher temperature, but much faster than the fuel.  This heat generated with an excess of oxygen then reacts with the carbon and the resulting gases exit the car via the exhaust system, cleaning the components on the way out also, i.e. the CAT and DPF on diesel cars.

The EGR valve itself will also be cleaned where present (and not blocked off and the motor is still operational) although some of the slurry which gathers in the pipework may remain.

 It is up to you on how you want to maintain your car.  You can leave it until it feels sluggish/noisy again or until you develop and issue, or you could add it to your annual service routine to help prevent issues developing and keep it running in good condition. 

We highly recommend this service ONCE A YEAR.

 This is a service to remove carbon build-up.  If your vehicle has a pre-existing issue or fault which is being masked by the carbon build up and perhaps the carbon is the only thing still holding a part together, (e.g. a failing catalytic converter) then the removal of the carbon will expose the issue. 

 (aside from exposing issues as detailed above) Hydrogen is a non-corrosive gas so it is not detrimental to any component within the engine. It only targets carbon build-up.