LS1 Injector pulse
05-18-2011, 07:30 PM
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LS1 Injector pulse Do anyone know where an LS1 gets its injector pulse from? I have a 98 t/a and I have no injector pulse. It is not the VATS system. It has been tuned out the computer and I also bought a VATS bypass still no injector pulse. Any ideas? I have been told its the cam sensor. Any diagnostic tools that will help. I hate to pull the intake off my car and replace the cam sensor and that not be the problem.
05-19-2011, 01:16 AM
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I would assume the PCM reads the cam sensor and fires the injectors accordingly but im not 100% on that you mite pop into the Fuel Injection forum and ask. Now you got me wondering so Im gonna see what I can come with
05-19-2011, 09:26 AM
#3
Pretty sure the PCM is going to use the crank and cam sensor for injector pulse but you definitely get the pulse from the PCM. Actually, I believe you have a "hot" to the injectors at all time (or should) and the PCM sends a ground to make them pulse. Maybe start with seeing if you have voltage to the injectors with the key on. I also thought there was a fuse for the injectors but not positive on that.
05-26-2011, 01:10 PM
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Pretty sure the PCM is going to use the crank and cam sensor for injector pulse but you definitely get the pulse from the PCM. Actually, I believe you have a "hot" to the injectors at all time (or should) and the PCM sends a ground to make them pulse. Maybe start with seeing if you have voltage to the injectors with the key on. I also thought there was a fuse for the injectors but not positive on that.
