How do you unclog fuel injectors?


3 Answers

Anonymous Profile
Anonymous answered
Sometimes, the trade-off for frequent use if those products is deposits in the upper engine. In the US of late, many auto parts and supply outlets have been taking advantage of younger drivers by pushing fuel cleaners as a beneficial product to "protect" their engines, or their "investments"--whenever you hear such high-brow language used by car people, beware.

While the "poor-sap" employees who are compelled to aggressively  "offer" fuel "cleaners" at checkout stands cannot be blamed, the auto parts companies should be taken to task over what is, essentially, misleading advertising and use of scare tactics. In the early days of fuel-injection in road cars (only carburetors were used prior to the the '80s) the engine failures in new cars became rampant (almost a certainty), with manufacturers refusing to honor warranties, until the Federal government stepped in, and not  only enforced warranties but also mandated fuel modification (affecting all outlets) that prevented such clogging and engine failures. As a result of universal adding of fuel cleaning additives by all gasoline manufacturers, the problem went from serious and ubiquitous to non-existent, by the 1990s throughout the US. As a result, the adding of additives by consumers was largely abandoned and fuel additives diminished and/or were relegated to bottom shelves in auto supply outlets. This state of affairs (injector clogging a non-issue) remained the status quo throughout the '90s and 'naught-ones until (it apparently has been calculated), enough time has passed for memory of the former "fuel additive" episode to fade into history. So now we see once again the aggressive marketing of the little bottles of miracle potion for the "protection" of young, impressionable drivers' precious car engines. Good for mfrs and sellers - they get exorbitant markups and profits from their miracle potions; not as good for well meaning consumers - they get relieved of money for essentially no discernible benefit . . . And some upper engine deposits in bargain.

The  moral of this tale? It is very easy, with no evidence and nothing to back it up, to tell someone they have fuel injector problems - how can you argue with that? And it is nearly as easy for unwary consumers to convince themselves that magic elixirs are making their engines healthy and happy. However, the facts tell a different story. So, unless your engine has accumulated very long use (say 10-15 years and/or over 100k miles, when a technician suspects clogged injectors, might mean he could not diagnose a problem, or wants to sell an engine vac job. If you "feel" you must "invest" in fuel detergents limit it to every year or so. Otherwise, save your money.
mike hodgson Profile
mike hodgson answered

Hi - there are a couple of different solutions you should look at ... And these depend if you've got a diesel or gasoline engine.

Diesel's a lot easier - they generally suffer less from build-ups within the engine so using a fuel injector cleaner like Red Line from an auto store every 5000miles should keep the engine clean.

If you have a clogged or blown injector, you're engine starts sounding like a chuffing train and loses power - you can normally still drive it for a few miles to a garage though. They will then extract the old injector and replace with a new - this is specialist work and done using a high-pressure extractor tool... Not something to try and home!

For gasoline engines, there is often more additives in the fuel, so they suffer more from build-up inside the engine. Again, using a fuel cleaner every 5000miles should help you out.

ps make sure you check that the fuel injector cleaner you buy works for your fuel type: Not all work on both diesel and gas

Arthur Wright Profile
Arthur Wright answered
Injector cleaner at any auto store and if youre using regular gas all the time, advised to run some STP or any other fuel cleaner in fuel tank at least once every two months and it will take care of any fuel problems

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