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DIY injector replacement ...easy enough? 

 

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Posted: Fri Mar 17, 2006 2:43 am 
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would you have to even bleed the air? wont it jsut be forced out when you try start the car after reassembling? :?

 

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Posted: Fri Mar 17, 2006 2:51 am 
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Gaz wrote:
would you have to even bleed the air? wont it jsut be forced out when you try start the car after reassembling? :?


I would f**k hope so, cos I know jack about how to bleed the air out!

 

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Posted: Fri Mar 17, 2006 7:53 am 
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Don't worry about bleeding the air out of the rail it will be returned to the tank, as the fuel lines are a closed loop. Any air in the injectors will be pushed into manifold by fuel pressure once the engine is started.

 

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Posted: Fri Mar 17, 2006 2:41 pm 
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Last edited by blackjack_original on Fri Jun 06, 2014 8:36 pm, edited 1 time in total.

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Posted: Fri Mar 17, 2006 4:13 pm 
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Regarding fuel pressure - in a perfect world, pressure would be maintained within the system indefinitely after the engine is stopped.

Not the case tho - if you leave overnight, pressure in the rail will have subsided to the point where you can avoid an octane bath. However, if the motor has been run within a few hours of you removing something from the fuel system - pressure will be present in the rail and fuel lines.

Unplugging the injectors wont help the cause. Disconnect the fuel pump (at the pump, relay or pull the fuse) and start the engine, wait for it to stall. The fuel system is now devoid of pressurised fuel.

 

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