Rough idle, sluggish acceleration and misfiring are all signs of clogged fuel injectors. The fuel system has filters, but over time they become damaged by dirt and debris. Once this happens, the likelihood of the injectors becoming clogged increases.Continue Reading
The symptoms of a rough idle and sluggish acceleration can also be attributed to a clogged fuel filter, but actual misfiring, especially in a late model car, is more likely to mean that the injectors are clogged. The reason for this is that injectors do not clog in unison, meaning that one or two injectors are more clogged than the others. Under hard acceleration, this usually results in one or more cylinders misfiring. This is less apparent in older models as the simultaneous injection system allows unclogged injectors to make up for clogged ones. Performance is still affected, but it may not be as obvious initially.
Clogged fuel injectors can sometimes be caused by low quality gas without additives. To compensate for this, a fuel injector cleaner can be added to the fuel tank after every other fill-up; however, fuel injectors do eventually clog regardless of the gas used. At this point, it is best to have them cleaned by a professional repair shop.Learn more about Car Parts & Maintenance
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Fuel additives designed to clean fuel injectors, carburetors, ports and intake valves do work, according to RepairPal, particularly if they have polybutene amine, or PBA, as part of their chemical makeup. However, those with polyether amine, or PEA, chemistry deliver the same benefits without causing deposits in the combustion chamber.Full Answer >
Some common things to check when a car's engine does not turn over include the battery components, the timing belt, the fuel level and fuel injectors and to look for moisture inside the distributor cap. On vehicles with carburetors, check to make sure the choke is not stuck.Full Answer >
Clean diesel fuel injectors by pulling out the injectors from the vehicle and manually removing dirt and deposits or by soaking the injectors with a pressurized cleaning solvent while the engine is running. The former option is more complicated and labor-intensive compared to the latter method.Full Answer >