Question about 1999 Daewoo Nubira

5 Answers

I have a 1999 Daewoo Lanos. Yesterday when I tried to start the vehicle it initially started and then shut off. It sounded bad and was miss firing. Then I tried to start it again and it did not even sound like the starter was turning over the engine and would not start. Later that evening tried to start it again and it started fine and drove fine. Now this morning I tried to start it again and it would start but kept shutting off and the idle was real bad and miss firing. Before this it drove fine and started fine?? To me it seems like its not starting completely... Not sure what to do now? Please HELP!

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  • jayson_bonk Sep 10, 2010

    I was advised that this vehicle only has a map sensor not a MAF. Could it be that? Also I did have a check engine light come on for the oxygen sensor?

  • jayson_bonk Sep 11, 2010

    I replaced the oxygen sensor lastnight and the vehicle was running great! But, this morning it would not run again. It starts but runs idles real bad mis firing and popping and shuts off. It seems like its running on three cylinders... So what could cause it to run great in the evening and bad in the morning??

  • jayson_bonk Sep 11, 2010

    I replaced the oxygen sensor lastnight and the vehicle was running great! But, this morning it would not run again. It starts but runs idles real bad mis firing and popping and shuts off. It seems like its running on three cylinders... So what could cause it to run great in the evening and bad in the morning??

  • jayson_bonk Sep 11, 2010

    I replaced the oxygen sensor lastnight and the vehicle was running great! But, this morning it would not run again. It starts but runs idles real bad mis firing and popping and shuts off. It seems like its running on three cylinders... So what could cause it to run great in the evening and bad in the morning??

  • jayson_bonk Sep 11, 2010

    For the last three days the vehicle will not run properly in the morning. When you try to start the enging it runs really rough, mis-firing and shuts off. When you try to start it again the engine is real loud and sounds like its running on 3 cylinders. Now when I come home in the evening the vehicle starts just fine and drives fine.... The only issues is at 6:45am?? I took the car to auto zone and they read the codes. it showed oxygen sensor and issues with the emissions. that was it. I replaced the oxygen senser lastnight and the vehicle was running great. again this morning it would not run without mis-firing and shutting off. Also, it did smoke a little from the exhaust pipe. Whatever the issue is it only happens in the morning. The temperature is usually around 78 - 80 in the morning and the evening is in the 90's. I don't know what else could cause this... Seems like something is not mixing properly.... I had crossed the spark plug wires before which caused the car to run real bad... This was fixed but the symtoms that I have in the morning are almost the same as when I mixed up the wires...

  • jayson_bonk Sep 11, 2010

    I replaced the oxygen sensor lastnight and it was running great. This morning it would not run again. It started but was running extremely rough and kept stutting off. A week ago I switched the spark plug wires on accident and that caused it to run real bad. That was fixed but thats how the vehicle runs in the morning like if it was running with a missing or crossed spark plug??? But, it runs great at night... Also currently there are no faulty codes anymore. It was only the oxygen sensor and an emissions code....What now?? I hope this gives you a better idea?

  • jayson_bonk Sep 15, 2010

    I found a vacuum hose that comes from the throttle area and connects to the top of the manifold where the spark plugs are that was not connected. It was sucking air rather than being hooked up into the manifold. Could this have caused my starting and idling issues? I hooked it back up and it seems to run better... I wont know until tomorrow morning if it will start..

  • jayson_bonk Sep 18, 2010

    This morning I tried to start the car and again it ran really bad with the symptoms I stated above. During the time the vehicle was trying to run I got a check engine light that started to flash. I checked the diagnostic on the vehicle and found that it was error code P0303 cylinder 3 misfire. I did change the plugs and wires a week ago. What else could it be?? Could this be the issue that is causing all of my morning starting issues?

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5 Answers

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  • Daewoo Master
  • 17,130 Answers

The fault seems to be in the electrics of the ignition system. So it will be ideal to have the impulse to the coil checked. If the ignition system is faulty the fault you have explained can be a result.
The plugs, the HT wires can be alright as teh car works well when it runs But the HT coil can also be a suspect.
But I would prefer to suspect the Ignition pulse to the coil, if so checked for failure in the electronic unit for sure as this erratic condition is likely of a faulty semiconductor.

Posted on Sep 18, 2010

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  • Master
  • 2,299 Answers

These kind of problems are tough to diagnose. I would start by getting it running and take it to Autozone and getting the diagnostics on it. It is free for them to test it for you. The computer in the car stores all of the errors that the car has had. So this will tell you where to start. I don't want to jump the gun, but it really sounds like the ECU is going bad. But again, it is free to take it there and without me being there and running some tests it is really hard to say.

Posted on Sep 15, 2010

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  • Daewoo Master
  • 22,219 Answers

Ask a local mechanic to check the crank sensor for you ,this is one of them jobs that could be a cheap repair but without the right knowledge you could change everything which costs a fortune and doesnt cure it ,these cars are quite simple and are based on a europeon opel (GM) so as it runs then doesnt its one of two things ,either spark or fuel and i suspect the spark but?? i dont have car in front of me to look at it you must have a local man that the neighbours recomend

Posted on Sep 11, 2010

  • Colin Stickland
    Colin Stickland Sep 11, 2010

    please ask a local mechanic to have a look then post what he says and i can then have a better idea whats wrong ,from 2000 miles away in spain i can only make suggestions as to the most probable cause ,it could be anything from a coil pack to a computer or a loose wire on a sensor ,

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  • Master
  • 1,857 Answers

You need to check for codes using a scanner and also check for faulty sensor data. If all this is ok then you need to check fuel pressure when its having a problem. Its all a guess until you eliminate options thru component testing. It sounds like your goingto have to have a shop look at this if you don't have the tools.

Posted on Sep 11, 2010

  • Susan Price Sep 11, 2010

    I see your looking for a cheap quick fix. Just be aware that we can guess all day long but if nothing ever gets professionally tested all your going to get from any of us is a guess. This is why diagnosing is recommended. What can look like a sensor issue can also be a loose wire or failed computer. So its your call. If you get too much input from all of us your just going to end up more confused.

  • Susan Price Sep 11, 2010

    by the way an 02 sensor will not cause this condition. A MAF might but it would set a code if it did. So what you already spent on a 02 sensor could of paid for a proper diag. . How much more are you willing to spend needlessly before you opt for addressing this properly

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  • Expert
  • 4,070 Answers

Hi! It's definitely a MAF (mass air flow) sensor problem. THe MAF has big contribution on engine performance specially on the idling and vacuum supply. If the MAF is faulty, stalling and hard starting can occur. Have the MAF repaced and you'll be good. Hope this helps and thank you for using FixYa!

Posted on Sep 10, 2010

  • dj_relly999
    dj_relly999 Sep 10, 2010

    If the diagnostics gave you an oxygen sensor failure then it should be replaced as soon as possible.

  • dj_relly999
    dj_relly999 Sep 11, 2010

    HI! HOws it going?

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