leaky injectors??

[nacelp]

I wouldn't trust this test, since the manifold walls are wetted, given the
heat/time from the engine being off, these fumes might just support a couple
secs of engine warm running
Grumpy


> I've had an inconsistent starting problem for a while that I'm trying
> to track down... 87 TPI 5.0 sbc, v-8, SC, '730. For a long time I had
> assumed it to be caused by the ecm starting data not tuned well to
> this engine, but I did this test the other day....
> With the engine idling, I pulled out the injector fuses (two of them). Of
> course, the engine stop right away and I turned the key once or twice
> to make sure it was out of gas. After an hour, and with the injector
> fuses still removed, I turned the key again. This time the engine ran
> for 2-3 seconds before stopping. This engine has the older cold start
> injector, but I pulled that out and repeated the test... the cold
> start injector showed no signs of leaking and the engine still turned
> over several times after sitting for a while.
> So, sound like a leaky injector(s)? Has anyone else ever tried this
> experiment?  Is replacement the best fix?.....
> Unless someone has a better idea, I'll pull the full rail/injectors and
> pressurized the system looking for injector leaks. I had tested the
> injectors a year and a half ago when I assembled the engine. They
> looked fine then....
> john gwynne


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