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Car idles then dies, tried everything!

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Old 07-15-2009, 09:12 PM
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Default Car idles then dies, tried everything!

Well almost everything, I replaced the IAT sensor, the Idle air control valve and don't know what else to replace... Car is running on speed density, it will idle for about 1 minute then it will die. The check engine light isn't on whenever the car is running so I'm at a lost.. Thanks for any and all help!
Old 07-15-2009, 09:13 PM
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fuel pressure regulator maybe?
Old 07-15-2009, 09:51 PM
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Originally Posted by shutzero
fuel pressure regulator maybe?
Not sure, it idles fine for about a minute and it revs fine, so I don't think it would be that, or would it?

Also, when It idles fine I rev it up and it goes back and idles fine, after it starts to want to die it will die if I give it some gas...
Old 07-15-2009, 09:59 PM
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im not 100% sure but it could be. have you replaced the tps or fuel filter
Old 07-16-2009, 12:09 AM
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is it an LS1? if it's an '01, check the pcv valve boot. they have a tendency to rip where it attaches to the ground wire and it causes a vacuum leak.
Old 07-16-2009, 07:46 PM
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Car is a 2000, I haven't replaced the TPS, BUT I unplugged it and when I did it wouldn't even accelerate...I wonder if it could be the o2 sensors....
Old 07-18-2009, 12:10 PM
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I replaced the Intake Air Temp sensor...didn't fix it...Started it up today, drove it around a while and it works now car must have self healing powers or something...
Old 07-19-2009, 08:44 PM
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Damnit...acting up again...Going to replace o2 sensors this weekend...
Old 07-19-2009, 11:10 PM
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I would check the fuel pressure before you buy O2 sensors. Engine will still idle for 5-10 seconds if you disable the fuel pump. I think the pressure should be 55 lbs.

Hope you can narrow it down.
Old 07-20-2009, 08:34 PM
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I have a fuel pressure gauge going to check it right now!
Old 07-20-2009, 08:43 PM
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Originally Posted by eseibel67
I would check the fuel pressure before you buy O2 sensors. Engine will still idle for 5-10 seconds if you disable the fuel pump. I think the pressure should be 55 lbs.

Hope you can narrow it down.

Wow thanks man! I hooked up my gauge, it is solid for a while about 30 secs or so then the pressure starts dropping and dropping! Pump is about 1 year old, not sure if I should replace the pump, fuel pressure regulator, or what!?!?! I'm going to replace the fuel filter tomorrow!
Old 07-23-2009, 11:16 PM
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Ordered fuel pump, will update with results, should be here Monday! I knew I shouldn't have let the SOB get below 1/4 tank...Live and Learn!
Old 07-26-2009, 12:26 AM
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Car runs like a champ, wish I would have done the pump first instead of spending 35 on the Idle Air Control Valve, oh well now that part shouldn't break for a few years!
Old 08-21-2010, 09:24 PM
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Gah, I'm having the same problem again! I already replaced the pump today and it still does it!




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