This method is called : Closed Circuit/Circulation . It means that the fuel is runing from the bottle and returning back to the pump without passing through the fuel tank .
You can use any fuel cleaner brand you want .
Its fast and easy to clean injectors and injection pumps (both diesel and petrol injection systems ).
Recommended to do it once per 2 mounths to keep your injection system clean and effecient .
All you have to do is disconnect the in and out fuel pump tubes and hook them into the bottle,then start your engine and keep it running for 10 mins .
You will notice an engine sound inprovement (run smoother and healthier than before)
After finishing this step hook up everything in original mount and start the engine for 2 or 3 mins to let the fuel cerculate into the pump again and your done.
Take your car for a ride if you want .
N.B : if you have troubles to restart the engine after this method, dont worry. All you have to do is purge the fuel suction cup to let it go into the pump ,then start your engine .
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