How can I tell if my computer is going bad in my car?

sara

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I have a 2000 Daewoo Lanos 4 door Sedan. Crappy car, I know.. but it was cheap. For the past few months my 3rd Cylinder has been miss-firing (so says the check engine light reader) and I've been having a problem with the fuel injector. When I press the gas sometimes, say to accelerate up a hill or to accelerate at all, the cylinder will miss fire as if it's not getting enough gas?. I noticed that on really hot days it would miss-fire a lot more but I figured it was all just the fuel injector. However my boyfriend argues that it's my COMPUTER and I might as well buy a new car because it's not worth fixing. It's cold outside now and it still miss-fires A LOT, getting worse by the day. Other than this problem - the car runs excellent and has low miles (86k) and no other known problems. Is this in fact the computer? How do I know?? Please help - I'm more than upset about it.
 
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