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2000 monte carlo poor idle


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rentalguy88
New User

Mar 30, 2013, 1:43 PM

Post #1 of 5 (1815 views)
2000 monte carlo poor idle Sign In

 an issue i got on my 2000 Monte Carlo LS. After about 10-15 mins she will idle erratically then stall.give her a couple minutes she will do the same thing. after a few tries she will throw code P0171. i had the intake and cylinder head gaskets replaced in january at the local garage. i replaced the fuel filter last fall. i replaced the PCV valve last week. I cleaned the throttle body and took off the maf sensor of my 97 malibu cleaned it and installed it on the Monte. I tried her and the same thing. repleced ignition coil module and coil still same thing.replaced automatic idle control sensor and throttle position sensor.still same thing.Should i have disconnected the battery for the car's computer to reset or do you think its a vacuum issue.


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Mar 30, 2013, 1:51 PM

Post #2 of 5 (1806 views)
Re: 2000 monte carlo poor idle Sign In

What is the fuel pressure while it is stalling out?





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rentalguy88
New User

Mar 30, 2013, 1:55 PM

Post #3 of 5 (1799 views)
Re: 2000 monte carlo poor idle Sign In

got no gauge to see pressure can it be bad spark plugs?


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Mar 30, 2013, 1:57 PM

Post #4 of 5 (1794 views)
Re: 2000 monte carlo poor idle Sign In

Not sure. If I had to guess where to start, it would be monitoring the fuel pressure while all this is going on. If it is setting a lean code, that could indicate low fuel pressure. A test gauge would confirm that.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


rentalguy88
New User

Mar 30, 2013, 2:00 PM

Post #5 of 5 (1772 views)
Re: 2000 monte carlo poor idle Sign In

i guess i'll put her in garage on monday to get fuel pressure test and see what happens from there.
thanks for your time






 
 
 






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