Question about 1999 Saturn SL

4 Answers

In every gear no matter what speed when i step on pedal it acts like a flat spot on a carb car

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  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    Hi ok i will check that in th e morning and report back to you , i have a genises scanner and checked the tps and it looked good

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    there is no mass airflow sensor that i can see
    and the tps checks good on scanner

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    hi i have a scanner this vehicle does not have a mass air flow sensor

  • Stan Thompsonn
    Stan Thompsonn Sep 17, 2010

    checked tps with scanner , ther eis no mass air flow sensor but when i acelertae in any gear , it acts like a flat spot in the acclerator pump on a carbuertor engine

  • Stan Thompsonn
    Stan Thompsonn Sep 18, 2010

    1996 sc2 1.9 dohc

  • Stan Thompsonn
    Stan Thompsonn Sep 18, 2010

    did yo u get the info yo u needed

  • Stan Thompsonn
    Stan Thompsonn Sep 18, 2010

    did yo u get the info yo u needed

  • Stan Thompsonn
    Stan Thompsonn Sep 18, 2010

    did you get the info i sent

  • Stan Thompsonn
    Stan Thompsonn Sep 18, 2010

    did you get the info i sent for you question

  • Stan Thompsonn
    Stan Thompsonn Sep 18, 2010

    if not it is a 1996 saturn sc2 1.9 dohc

  • Stan Thompsonn
    Stan Thompsonn Sep 18, 2010

    1996 sc2 1.9 dohc

  • Stan Thompsonn
    Stan Thompsonn Sep 18, 2010

    are yuo still with me

  • Stan Thompsonn
    Stan Thompsonn Sep 20, 2010

    this is a 1996 not 1999

  • Stan Thompsonn
    Stan Thompsonn Sep 20, 2010

    replaced tps samething now what

  • Stan Thompsonn
    Stan Thompsonn Sep 22, 2010

    i replaced the tps and fuel filter today and it still jerks

  • Stan Thompsonn
    Stan Thompsonn Sep 22, 2010

    i chantged tps and fuel filter and it still does the same thing checke dfuel pressure and it is 36 and and 45 when yo ustep on it

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4 Answers

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  • Master
  • 1,297 Answers

Most likely the TPS (throttle position sensor)]
you need a DVOM to test
KOEO and measure voltage as you press the accelerator

loss of voltage = bad TPS

Posted on Sep 19, 2010

  • Sean Reisdorf
    Sean Reisdorf Sep 20, 2010

    you are correct, this vehicle has a MAP

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  • Saturn Master
  • 75,822 Answers

Year and model and which engine do u have

Posted on Sep 17, 2010

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  • Master
  • 326 Answers

Couple of potential causes may be throttle position sensor may be dropping out and can be checked with scanner perform a tps sweep and watch for sudden glitch should be smooth transition from about .45v at closed throttle to about 4.85 or so @full throttle also if this vehicle uses a mass air flow meter it could cause these symptoms but are usually more problematic thru out the rev

Posted on Sep 16, 2010

  • thecranks Sep 20, 2010

    have you replaced fuel filter yet and is this temperature related does it do it right off the bat in morning and when hot

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  • Saturn Master
  • 22,156 Answers

Could be mass air flow sensor but you would need to run a diagnostic which is easy to do as its a american home market vehicle and has a OBDII connector ,ask a local mechanic to have a look for you would no doubt be your best option

Posted on Sep 17, 2010

  • Colin Stickland
    Colin Stickland Sep 18, 2010

    it will have a meter in the air intake between the air filter and the inlet manifold ,

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