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Why is my car surging?

This is a discussion on Why is my car surging? within the General Help forums, part of the LSx Technical Help Section category; Originally Posted by Spaz i meant the wire... and in would it be possible you connected the front o2 sensor ...

  1. #21
    Senior Member clg82's Avatar
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    Quote Originally Posted by Spaz View Post
    i meant the wire... and in would it be possible you connected the front o2 sensor in to the rear o2 wire...
    I didn't even remove the rear o2 sensors so i couldn't have mixed them up

  2. #22
    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by clg82 View Post
    Probably 30-40 at the most......like i said it never did this until i replaced the 02 sensors and disconnected the negative battery terminal.....
    The computer is going to have to relearn the newer (and not lazy) O2's.

    Report back after another 40-50 miles please.

  3. #23
    Senior Member clg82's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    The computer is going to have to relearn the newer (and not lazy) O2's.

    Report back after another 40-50 miles please.
    i will probably take it for a ride this weekend.

  4. #24
    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by clg82 View Post
    I didn't even remove the rear o2 sensors so i couldn't have mixed them up
    i asked that before but you didn't answer that... only the other questions...

  5. #25
    Senior Member clg82's Avatar
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    Quote Originally Posted by Spaz View Post
    i asked that before but you didn't answer that... only the other questions...
    sorry man i didn't mean to come off rude, but i think that the front sensors and rear sensors are far enough away it would be hard for anyone to mix them up, i don't even think the plugs would reach.

  6. #26
    paul black ls1 02
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    have a 2002 ls1 it has erratic idle and the engine shuts down pls help

  7. #27
    The Bandit Wesman's Avatar
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    Quote Originally Posted by paul_97ta View Post
    have a 2002 ls1 it has erratic idle and the engine shuts down pls help
    Do you have a check engine light on??

    It could be quite a number of things.
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  8. #28
    The Bandit Wesman's Avatar
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    Quote Originally Posted by clg82 View Post
    Well as most of you know from my previous posts i just replaced both the front o2 sensors, then i reset the pcm by un hooking the negative battery terminal. Now while the car is ideling......sometimes the car surges between 1,000-1500 rpms....it doesn't happen all the time just at idle and not all the time..is the car just relearning the air/fuel ratio or did something F&ck up from me unplugging the battery to reset the pcm?
    Did it do it immediately after you started it or did it start after it was warmed up??

    If it started surging right on startup it has nothing to do with the O2's, because the PCM doesn't even start monitoring the O2's until the engine is running in closed loop operation (warmed up).

  9. #29
    Senior Member clg82's Avatar
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    Quote Originally Posted by Wesman View Post
    Did it do it immediately after you started it or did it start after it was warmed up??

    If it started surging right on startup it has nothing to do with the O2's, because the PCM doesn't even start monitoring the O2's until the engine is running in closed loop operation (warmed up).
    it only does it after it has been warmed up, and i do have a service engine soon ligt on for not having my egr......

  10. #30
    War Machine BIG GUNS's Avatar
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    May need to get a code kick out and see what codes if any its' kicking to really know. BIT data will lead you to the problem. Aircraft are the same way. Just need to interpret the codes. Good Luck.

  11. #31
    Senior Member clg82's Avatar
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    Quote Originally Posted by BIG GUNS View Post
    May need to get a code kick out and see what codes if any its' kicking to really know. BIT data will lead you to the problem. Aircraft are the same way. Just need to interpret the codes. Good Luck.
    the code i am throwing is for my egr delete, that is the only code i am showing........

  12. #32
    War Machine BIG GUNS's Avatar
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    Sounds like you may have gotten a bad O2 sensor. I had one bad right from the manufacturer. Not sure if that helps. Would be a pain in the ass chasing that down.

  13. #33
    Member edbird's Avatar
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    This is from the service manual:
    Sensor/System
    Monitor the Heated Oxygen Sensors (HO2S) voltages. The Heated Oxygen Sensors (HO2S) should respond quickly to different throttle positions. If the sensors do not respond, inspect the HO2S for silicon or other contaminates from fuel or the use of improper RTV sealant. The sensors may have a white powdery coating and result in a high but false signal voltage (rich exhaust indication). The PCM then reduces the amount of fuel delivered to the engine causing a severe driveability condition. For more information, Refer to Information Sensors/Switches Description .
    Inspect the MAF sensor connections. Repair or replace terminals. Refer to Repairing Connector Terminals in Wiring Systems.
    So I'm thinking Mr.Lous has it pegged: don't do anything else to it till you put some miles on it.

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