[Diy_efi] Leaking injectors

[Bill Washington]

J
    Check the injectors at low fuel pressure, not high - IE the sorts of 
pressures the injectors will be under when the engine is stopped!
High pressure will help to seal them, whereas low pressure relies on 
their own internal spring tension, this is the worst case scenario, when 
leaking is most likely to occur.

Regards
Bill W
diy_efi-request at diy-efi.org wrote:

>Date: Thu, 23 Jan 2003 21:31:46 -0500
From: "Toyota Supra" <turbosupramk3 at hotmail.com>
>To: diy_efi at diy-efi.org
>Subject: re: [Diy_efi] could i have multiple bad injectors? (UPDATE)
>Message-ID: <F182HEnp7Y5pnryMyTh00026381 at hotmail.com>
>Content-Type: text/plain; format=flowed
>MIME-Version: 1.0
>Precedence: list
>Reply-To: List for general do-it-yourself EFI talk <diy_efi at diy-efi.org>
>Message: 2
>
>ok, as an update, i have rigged up an injector testing setup, where i have a 
>pump with a feed line, in a bucket, with a gallon or two of gas. it feeds 
>into a dsm rail, which is mounted to an old dsm head, and it houses the dsm 
>injectors.
>
>none of the 6 that i recently had on the car leaked, one of the remaining 2 
>(if you remember i purchased two sets of four) did leak, it dribble out at a 
>somewhat steady, quick pace. i have even hooked up a pump to the fuel 
>pressure regulator and put about 85 to 90 pounds of fuel pressure on the 
>injectors, but still no leak.
>
>i am confused as to how the test conditions are any different than the 
>original conditions ... the injectors are housed in a different rail and 
>different head (as opposed to an intake manifold before) but none of those 
>differences should effect a leaking pintel? i visually inspected the pintels 
>and found none to appear bent or damaged.
>
>if anyone has any thoughts, i'd love to hear them, as i am completely 
>stumped as to why i can't duplicate? could the vibration of the running 
>motor have something to do with it? wtf?
>
>thanks
>
>-j
>  
>


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