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hi people, Im new to this forum but I hope this is the right place. I left my car, cobalt 2005 base 2.2, parked for about two days on the street. and today when i tried to start it in the morning it didnt do nothing. no cranking, no ignition.

i took the battery to autozone and got the guys to charge the battery. I hooked it up and now the car did cranked but did not ignited. before this point i check for fuses on the hood and on the co-pilot fuse box. swapped fuel pump relay and check for the fuse condition; everything is good. the dash only displays the check engine light and no ENG PWR RDUCED or CHECH CHARGE SYS. I managed to run a computer diagnose thanks to some neighbor's computer but it says no code found. i think the computer was not the right one because it said it for smog testing.

so i did some research on how to diagnose the fuel pump, and told my friend to listen to the gas tank for any clicking or noise. and nothing. at this point im confident it's the fuel pump, but that's just my 19 year old opinion. i would prefer not to pay 600 for the replacement. i dont have too much money but I have a decent pc that I could pawn and get around 200-300. Ill check on eBay for fuel pumps which range from $80-150.

am i right on my diagnosis or is it something else? one important note is that it ran fine before i parked it around friday's afternoon. i did however had it almost always on <1\4 tank of gas, so I may have burnt it good. any help or advise would be much appreciated.
 

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Was the car parked on an incline? Did you check the big "BCM" fuse in the trunk?
 

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Although not impossible, I highly doubt it's your fuel pump. I believe that there should be a code of some kind if you have a CEL. You may want to borrow a different scan tool.

You may want to disconnect the battery for a few minutes, reconnect and give it another try.
 
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