Virtual Mechanic » Virtual Mechanic.com.au explains about EFI – Injectors http://www.virtualmechanic.com.au The online motor vehicle repair guide Mon, 04 Apr 2011 21:01:15 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 EFI – Injectors http://www.virtualmechanic.com.au/2009/09/efi-injectors/ http://www.virtualmechanic.com.au/2009/09/efi-injectors/#comments Wed, 23 Sep 2009 10:47:03 +0000 virtualmechanic http://www.virtualmechanic.com.au/?p=520 PURPOSE
The injectors are designed to inject fuel and when the fuel injector is energised it should spray fuel.  When this happens the combustion chamber will burn it correctly.  Injectors usually run well for 150,000kms then they should be checked or ultrasonically cleaned to be sure that they are not gummed up and are spraying effectively.

THINGS TO LOOK FOR
It is very difficult to check an injector when fitted to the engine.  One of the indications of a faulty injector is that the vehicle is hard to start in the morning.  This may be the fuel injector leaking or the spray pattern may be causing poor economy or poor performance.  These symptoms are usually noticed at around 250,000kms.

IS IT EXPENSIVE TO REPAIR?
Fuel injectors are not cheap at around $30.00-$40.00 each. 

TEMPORARY REPAIR AND LONG TERM REPLACEMENT
Fuel injectors are repairable in that they can be ultrasonically cleaned, spray tested and pressure tested to be sure that they hold the pressure and not leak under pressure.  These tests are performed by a specialist fuel injection service.  It is important to get a before and after report to prove that there was a difference made when the injectors were cleaned.  The fuel injector may also have a fuel injection cleaner poured into the fuel tank.
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By Darren Gow-Brown, Melbourne Australia ©2009

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