IDID: Robbing Your Diesel of Power

The last few years have seen a significant increase of operational issues relating to modern low emission diesel engines, ultra low sulfur diesel fuel and bio-diesel use.

Regeneration of particulate traps, the use of DEF (diesel emission fluid also known as urea), greater amounts of water and reduced cold handling characteristics are just a few of the issues. However, nothing has robbed more power, reduced productivity and cost more money than Internal Diesel Injector Deposits or IDIDs or just plain IDs.

The sources of IDIDs have been under investigation. The deposits, consisting of both waxy/soapy and carbonaceous/lacquer types, have been linked to sever oxidation, bio-diesel, lubricity agent incompatibility and even pipeline rouge. The real cause has now been determined and a solution formulated to reverse and prevent fuel induced injector “stiction” (static & friction combined).

The one common denominator of these operation problems is that they occur in engines with high-pressure common rail injection fuel systems. Both direct and indirect injection systems have been affected by deposits.

New injectors are precision instruments. They have tolerances as small as 1 micron and with as many as 24 holes in the injector tip, any deposit can rob economy and power in short order.

As it turns out a culprit is an incompatibility of commonly used and widely accepted corrosion inhibitors. Additionally, trace amounts of sodium salts have shown up in fuel. It is still unclear as to where the “salt” is coming from.

The newest and primary test used to evaluate fuel additive detergency is now the CEC DW-10 for injector coking. It is an extensive 60 hour engine-stand test measuring engine power under high speed and high load conditions.

There is a sixteen hour break-in period then cycles of 8 hour high speed-high loads are followed with 4 hour “soaks”. Engine power is measured every hour during the 8-hour runs. The engine used is a Peugeot model DW-10.

The CEC F-23-01 test aka the Peugeot XUD-9 Injector Deposit Test is used in conjunction with the DW-10 to evaluate performance.

In conclusion, the only product able to effectively treat and prevent IDIDs, is Hot Shot’s Secret Diesel Extreme. This is especially true in sub-freezing temperatures when anti-gel alone does not appear to be working.

Resource: Primrose Oil Company, ©Fall 2011

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