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Ls1 runs for 5 seconds shuts off Not VATS

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Old 05-03-2009, 02:21 PM
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Default Ls1 runs for 5 seconds shuts off Not VATS

What else could cause this to happen besides the VATS. I had the VATS taken out of my PCM. I have all sensors plugged in that I know. Not sure what else it could be, please help.
Old 05-03-2009, 03:55 PM
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Could be the MAF sensor...or VATS hasn't properly been disabled in the PCM.
Old 05-03-2009, 07:42 PM
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It will turn off if the maf doesn't work? I thought it would just run bad. I have one and its plugged in but its in bad shape... I bought it used.
Old 05-03-2009, 08:00 PM
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Yeah, it'll start and idle flare...then die...if the PCM can actually report that it's broken, then it'll either almost die and catch itself and be ok in speed density mode...or require a restart...but then be ok in speed density mode.
Old 05-03-2009, 11:08 PM
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I cant get it to run for more then 5 seconds ever. Sounds like if the pcm thinks its broken and goes into speed density mode then it will run after that but it never does. You can start it rev it up and it just dies. Sometimes it has a hard time starting other times it fires right up. I don't have an obd II connector yet so I can't read codes or anything. I know they are cheap.
Old 05-04-2009, 05:06 PM
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Bump please help.
Old 05-05-2009, 12:25 AM
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If the vats was messed up, it shouldnt start at all.
Old 05-05-2009, 03:34 AM
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Thinking now it has something to do with the oil pressure sending unit. Its plugged in and I don't think its broken but it may be bad or something. I believe the pump is working but I looked in the valve cover through the hole and it looked pretty dry.




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