leaky injectors??

[Shannen Durphey]

John, 
At work we pull the fuel rail, insert a piece of cardboard underneath
the injectors, pressurize the system and let it sit overnight.  Leaky
injectors will always stain the cardboard.  It's more work, but it
eliminates the guessing.  If the engine is warm when the rails are
pulled, the results are more dramatic.

One of the most common symptoms of leaking injectors is a hard start
hot, often requiring the throttle be held about halfway open before
the engine will run.  Starting is accompanied by a big cloud of black
smoke. 
HTH
Shannen

John S. Gwynne wrote:
> 
> | Get a Pressure Guage for the fuel rail.  Perferably one with a purge port.
> | Autozone for $39 fills the bill.
> | Presurize system and see how fast it leaks down.
> | Pinch the return line and the pump side so that the only way to pressure to
> | disapprear is thru leaking injectors.
> 
> Good test, but I would have to pinch off expensive stainless steel
> braided hose :( ... I suppose that wouldn't hurt it... but given the
> test I performed, is there any way that a leaky injector is not
> responsible? the gas had to come from somewhere, or am I overlooking
> something?
> 
> john gwynne
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