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    constant speed - jerking

    whenever im driving and i stay at a constant speed (30mph) my car seems like its jerking along. i replaced the knock sensor thinking that would help it and it hasnt. could my timing be off? the person i bought the car off of took the head off and had it hot tanked and he had to do a valve adjustment, car has a H22a. also the computer is a P13 chipped with something. could my car just maybe need a tune? my gas mileage is shit also. please i need to get this fixed asap.
    new ride
    07 cobalt ss/sc

    #2
    As I'm sure you know, it could be many, many things, but since your fuel mileage is poor, I'd suggest maybe changing out your fuel filter. Good luck with it.

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      #3
      Originally posted by According2Aaron
      As I'm sure you know, it could be many, many things, but since your fuel mileage is poor, I'd suggest maybe changing out your fuel filter. Good luck with it.

      ill try it out, thanks for the input, anyone else have any ideas?
      new ride
      07 cobalt ss/sc

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        #4
        can someone post a pic of where the fuel filter is?
        new ride
        07 cobalt ss/sc

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          #5
          http://www.cb7tuner.com/vbb/showthread.php?t=53050

          it might also be the oxygen sensor, not sure though
          Members Ride

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            #6
            Originally posted by blackcb7
            http://www.cb7tuner.com/vbb/showthread.php?t=53050

            it might also be the oxygen sensor, not sure though

            thanks
            new ride
            07 cobalt ss/sc

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              #7
              ur welcome, let us know if that helps
              Members Ride

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                #8
                Originally posted by blackcb7
                ur welcome, let us know if that helps
                i will, ill probably pick up a filter thursday when i get payed
                new ride
                07 cobalt ss/sc

                Comment


                  #9
                  It could be a lot of things, like someone already said.

                  Look at the "tuneup," things first:

                  ~check out your spark plugs, spark plug wires, check to see any crust buildup in the cap/rotor(Dist.). It could be that your timing is off...car jerking at constant speed could mean you're not getting a constant spark duration...

                  ...when was the last time it had a tuneup?

                  best of luck man, you may want to replace the o2 sensor if you dont know when it was changed last. That could be the culprit for bad gas mileage. The voltage could be low, which isnt much but usually fuel filters go for long periods of time...

                  Last edited by Accord13&BA4; 08-22-2006, 07:58 PM.

                  1990 Accord Lx F22a1(Daily) SOLD - will be missed
                  1990 Prelude Si B21a1 (Fun car!)

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                    #10
                    Also after you replace that stuff, don't forget to reset your ECU. It might help clear up any crap that it hasn't forgotten yet, and make things run smoother. Good Luck
                    (RIP)1993 LX Sedan
                    Frost White Crew Member #36

                    JDM Beating Stick Owner #1
                    My (old) Ride

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                      #11
                      Originally posted by Accord13&BA4
                      It could be a lot of things, like someone already said.

                      Look at the "tuneup," things first:

                      ~check out your spark plugs, spark plug wires, check to see any crust buildup in the cap/rotor(Dist.). It could be that your timing is off...car jerking at constant speed could mean you're not getting a constant spark duration...

                      ...when was the last time it had a tuneup?

                      best of luck man, you may want to replace the o2 sensor if you dont know when it was changed last. That could be the culprit for bad gas mileage. The voltage could be low, which isnt much but usually fuel filters go for long periods of time...

                      the thing is that the car had a tuneup before i bought it, new cap, rotor, wires and plugs. could it maybe be that the cap and rotor arent installed properly? also im not getting a CEL for the o2 sensor. could it still be bad?
                      new ride
                      07 cobalt ss/sc

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                        #12
                        Ignitor maybe how bad is it jerking? You could tear off the dizzy cap and see if everything is in tact.

                        The New-ish Ride
                        My old Ride
                        Hear my Vtak!!!
                        MK3 Member #3
                        I piss off people for fun.
                        IA 08 Sunburn Victim #1

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                          #13
                          its jerking pretty bad, when its jerking it sounds like the motor is bogging or misfiring but then when i accelerate it goes away
                          new ride
                          07 cobalt ss/sc

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                            #14
                            anyone?
                            new ride
                            07 cobalt ss/sc

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                              #15
                              Check the distributor as I mentioned. You sure your timing is right?

                              The New-ish Ride
                              My old Ride
                              Hear my Vtak!!!
                              MK3 Member #3
                              I piss off people for fun.
                              IA 08 Sunburn Victim #1

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