12/11/2019
Knowledge 101
⚠️Symptoms of DIRTY Fuel Filter‼️
⚠️1. Lack Of Engine Power
An overall lack or engine power in all gears can be due to a lack of fuel getting to the injectors. This can be caused by a dirty fuel filter. The ECU will automatically restrict the engine output to protect the engine. When this happens, the engine will go into 'limp' mode and a check engine light will display on the dashboard. There are of course many other reasons for a lack of power like faulty injectors or mass air flow sensor. It's worth checking the fuel filter condition first, as this is the cheapest and easiest to fix.
⚠️2. Engine Stalling Under Strain
If you find that the engine is losing power under hard acceleration or going up a steep incline, then it may be down to a bad fuel filter. If the filter is nearly clogged up with debris, this will limit the amount of fuel getting through it. It may be ok under normal driving conditions, but the extra fuel needed to accelerate may not be available if a filter is blocking it. Lack of acceleration can often be mistakenly attributed to a faulty sensor or a vacuum leak. That's why a fuel pressure test is the best way to test if the fuel coming out of the filter is impeded by excess dirt.
⚠️3. Random Engine Misfire
Another symptom that can occur under heavy load, is random cylinder misfire. Sometimes these will show up as error codes, or the vehicle might stutter a bit going up a hill under load.
The fuel filter may restricting the amount of extra fuel getting to one or more of the injectors, causing the misfire. It's worth noting that a clogged fuel filter won't cause a car to misfire while stationary. Modern cars use very little fuel when idle. Unless the fuel filter was completely blocked, it is will probably be caused by something else.
We have available fuel filter for TOYOTA D4D 2005-2020 models.
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