LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

No injector pulse?

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Old Apr 23, 2005 | 01:59 PM
  #1  
jj93z28's Avatar
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No injector pulse?

I am finally getting somewhere with diagnosing this car. I do not seem to be getting a pulse at the injectors just a constant voltage. What can cause this? The car is pouring white smoke out the back both pipes(duals) and snaps and pops on one side. We removed two of the injecter plugs the popping stopped.
Old Apr 23, 2005 | 02:31 PM
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jj93z28's Avatar
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Re: No injector pulse?

I just realized your supposed to test for flashing ground while cranking not with the engine running. Is it supposed to pulse with the car running?

I have good compression on the cylinders that don't seem to be running, I wonder if I have a bad injector
Old Apr 23, 2005 | 02:55 PM
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Re: No injector pulse?

if you did a scan on the pcm and you got a code that read to few a pulse it might be your wire leading to your opti spark. I had the same problem thinking it was the injectors, ground wire, or a bad pcm but it was the opti spark connector wire.
Old Apr 23, 2005 | 06:49 PM
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pulse

I am trying to get it scanned, just have to wait for a buddy to bring it home from work. I put a different plug and wire on the cylinder nothing, I can feel the injector tapping so i assume its working.

When I disconnect the injector on the bad cylinder engine stops knocking.... I amnot sure whats going on
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