Holley 4 Brrl gm ecm

[Shannen Durphey]

Do you have a scope or noid light to confirm that the ecm is not
triggering the injectors?
27" of vacuum sounds like a pretty strong signal to me. Have you
checked it with a guage?  Are you reading the Diacom info correctly? 
Any chance you're on ported vacuum??  Lots of directions to go, you
should have some diagnostic tools to work with.
Shannen

Shane Buss wrote:
> 
> Here's what i got guys..
> 
> car starts.. idles fine for 5 seconds.. then it revs up a little, then quits
> spraying and dies..
> 
> The ecm is cutting the fuel out, and my map sensor reads only 27HG.. i
> cannot find ANY vacuum leaks, and i dont think i have any.. i tried 2 map
> sensors..
> 
> i think my ecm might be fried, but diacom shows correct readings for
> everyone other sensor..  i pulled the vacuum line to the map sensor and
> sucked on it as hard as i can, diacom showed 22HG.. sound right?
> 
> THanks,
> Shane
> 
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