Delica Canada | Mitsubishi Van Club

my injector chamber in the head keeps getting filled up with carbon and i have to clean the chamber every month, because the pickup is very slow and acceleration is very difficult.please help my.

Hi Mhussain,

Your previous post says you are in Sri Lanka, and that your engine is a cyclone engine. Presume that you have a diesel engine ?

I am not an expert, but I am sure someone else who is will reply.

Some little ideas :

Is your diesel fuel clean ? Do you need to filter it before using? Maybe try a fuel additive to increase cetane ? Our diesel fuel here has a lower sulphur content than the diesel of 15 years ago (to decrease air pollution), so the rubber gaskets get dried out, causing fuel leaks and air leaks. Is your fuel separator screen clean, apparently the old gas tanks have a painted lining which can peel off which gives junk in the fuel. Or the fuel lines break down with age. Also, the new Biodiesel which has been added to some diesel causes the lines and fuel tank to break down (called B10 or B5 etc, because they mix 10 or 5 percent biodiesel in with the diesel, but biodiesel has alcohol and chemicals not natural to diesel.

Here, vans who have carbon problems are running vegetable oil which needs heating to specific temperature before it gets into the engine (read details on WVO Waste Vegetable Oil postings), so maybe you are also having a problem with the fuel not burning completely.

One guy posted how to clean injectors with a sonic toothbrush.

Good Luck, please keep in touch.
Cheers, Christine.

Could also be injection timing - if it's not exactly right you'll get a lot of problems - incomplete combustion, smoke, very little power and soot/carbon building up... Also check the condition of the EGR valve (if equipped), they have been known to get gummed up and stick open (especially when the timing has been out for a while and the fuel isn't burning right) and cause more smoke and soot. Unfortunately injection timing requires a special tool and a bit of experience working on this kind of diesel engine / injection system.