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Unread 09-11-2013, 09:59 PM   #1
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Default 2004 Chevy Aveo Issues

I am in need of help with my Sister's 2004 Chevy Aveo. It has a 1.6L engine and has been a royal pain as of late. The car has always had a problem with the low oil pressure light staying on, even after replacing the oil pressure sensor. Last year the plastic timing belt tensioner pulley assembly broke causing issues with the car. A local mechanic pulled the head, had some machine work done to it and was able to get the car running. About this time last year the plastic thermostat housing broke and I replaced it with a good quality metal one while replacing the thermostat as well. Early this summer the car developed a cold start issue. It was sporadic at first and seemed to be cured by the use of fuel treatment additives. Now the car will turn over, and start sporadically. The check engine light is on, but is not displaying any codes. You can hear the fuel pump run when the key is turned on.

Ideas anyone?

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Unread 09-12-2013, 05:20 PM   #2
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Hi. A couple ideas:

Oil pressure light on, with sensor replaced means one thing: you actually have low oil pressure, exactly what it's telling you. Probably oil pump replacement.

The "turning over and starting sporadically" sounds to me like a fuel pressure regulator. Very easy and fairly cheap fix. By starting sporadically do you mean some days it won't start at all? Or that it just cranks longer than it should?

As for the check engine light being on and not displaying any codes, that's impossible. IF the malfunction indicator lamp (check engine light) is set, there HAS to be a code set. Most likely some cheap scan tool cannot read it properly and you need to have someone with a decent scan tool do so.

Hope this helped.
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Unread 09-16-2013, 05:37 PM   #3
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Default Aveo Issues

Mike,

Thanks for posting your response.

The sporadic starting issues I describe range from the car starting right up the first time you try it to the car not wanting to start at all. Right now, the car will not start at all, even if starting fluid is sprayed into the intake.

The code issue is another story. It appears my younger brother chose to replace the battery, then look for the codes. This explains why no codes were found when we attempt to look for them.

Please let me know your thoughts regarding this matter.

Kurt.

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Unread 09-16-2013, 05:44 PM   #4
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I had an Aveo (2005), and I had none of the issues you described above.

I know for a fact, though, the fuel pump was starting to give out. However, right around that time, it was totaled. So, once again, I am of no help.
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Unread 09-16-2013, 08:49 PM   #5
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When you turn the key, put your head out the door and toward the back. Do not crank it, just cycle the key to the on position. Listen for the fuel pump. It should be audible, and turn off after 2-3 seconds.
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Unread 09-17-2013, 10:09 PM   #6
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Default Aveo

Mike,

Yes, you can hear the fuel pump turn on when the key is turned on.

I have been wondering if it could be the coil pack due to the sporadic nature of this problem.

Thanks for your assistance with this matter.

Kurt.

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Unread 09-18-2013, 10:33 AM   #7
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Indeed that's an option as well - google for information on checking those.
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Unread 09-18-2013, 11:49 AM   #8
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Sounds like a bad crank sensor. Has anyone checked for spark?
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Unread 09-18-2013, 11:50 AM   #9
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Timing belt is common also
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Unread 09-18-2013, 01:33 PM   #10
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Timing belt wouldn't be intermittent though.
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