Question about 1993 Buick Century

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Car will studder when you press on the gas, and then will die.

93 buick century, will studder when you press on the gas, and inch forward, studder, and inch forward and it will eventually die. If you restart it right away, it will do the same thing. Eventually after trying to restart it several times, the car wont even turn over. If you let it sit for several minutes, it will drive fine.

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  • 5 more comments 
  • leet_dreamer Jun 02, 2009

    Without taking it to someone that will charge a arm and a leg, How can I test to see if that is the problem?

  • leet_dreamer Jun 09, 2009

    it wasnt the fuel filter... could a air flow sensor do it? one half of the sensor gets VERY dirty... y would that be?

  • leet_dreamer Jun 10, 2009

    Its not the air filter, the air filter was just changed!, it idles smooth, and we never tried to accelerate in neutral.......

  • leet_dreamer Jun 11, 2009

    the air filter, is hooked up to a large hose. That hose is not connected completely. it is sort of just ... sitting there. Would that affect the maf? or should the air filter still be working properly? The air filter was changed in November. and it is still bleach white.-I know this question is going to have a obvious answer. Thanks- I have not had a chance to check the rmps in neutral.

  • leet_dreamer Jun 17, 2009

    so with the duct on, it ran GREAT for a day, the service eng. light still came on.. but it never died. and then....... the next day, took it out to do IN TOWN driving.. not highway, and it died!!!!! multiple times! took the duct off, and it started right up and ran fine!... wth????? now what? a new MAF sensor????

  • leet_dreamer Jun 18, 2009

    Alright Ned,

    So the car has come to the point, where you will start it... put it into drive, and it will die... When it dies it makes some scary noises..like .. grinding..... we still haven't changed the MAF, I don't have the money to right now, do you still think its the MAF... or???? please help...

    I think I might just sell it, someone can part it out, and make ALOT of money................UGH, we were in the intersection of the busiest road in my city..... when it just died, let it sit for a min, it drove for a min, let it sit for a second, it didn't drive, and let it sit for a half hour, and it made it 20 min home.... sdlfksdlfjsdlfjd

  • leet_dreamer Jun 18, 2009

    What are the chances that it could be the ECM???

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  • Buick Master
  • 3,433 Answers

Defective fuel pump or cloged fuel filter,

Posted on Jun 02, 2009

  • 8 more comments 
  • Ned C Cook
    Ned C Cook Jun 03, 2009

    A fuel pressure ck is the first step. If you have no idea when the fuel filter was last changedI think 16 years is long enough for the original. It's really inexpesive and a oil chang place like jiffy lube can do it for minimal cost. .Have it changed first. Fuel pumps usually work or don't work, so filter first. OK? Just go in amd ask for a fuel filter change only. It won't take them long and I think you are due anyway. Good Luck.

  • Ned C Cook
    Ned C Cook Jun 09, 2009

    Yes, the maf sensor can affect the fuel supply. and the fact it is dirty is not good.. The question is why or how is the sensor getting so dirty from filtered air? Maybe the air filter is damaged or real dirty itself. Won't hurt to chk. good luck

  • Ned C Cook
    Ned C Cook Jun 10, 2009

    How does it idle? smooth or rough? Will it die if you accelerate in neutral?

  • Ned C Cook
    Ned C Cook Jun 10, 2009

    see if you can slowly raise the rpms in neutral and note the results.we are cking to see if it gets steady fuel Go to about 1500 rpms pausing and holding the gas at cdifferent rpms. Don't exceed 2000 rpms. When you pause and hold, hold for about 30 seconds. Let mr knoe ok?

  • Ned C Cook
    Ned C Cook Jun 11, 2009

    Yes, most definately. The maf sensor tell the computer how much fuels is needed for proper air/fuel ratio. God job finding it.

  • Ned C Cook
    Ned C Cook Jun 11, 2009

    Everything back to normal?- Ned

  • Ned C Cook
    Ned C Cook Jun 12, 2009

    your filter is fine, :) it was never used with the duct left off. how is the car running now.? I hope ll is well

    - ned

  • Ned C Cook
    Ned C Cook Jun 18, 2009

    I would lie to apoogize for the problems you are having, but there is so much interaction between all these sensors and controls that a person can spend a lifetime of Sundays doing so. . I'm afraid you hit it on the head. The MAF sensor measures the amount of air passing through the duct, How? I couldn't tell tell you, But in doing so it communicates with the ecu and the ecu in turn regulates the amount of fuel proportionateely for proper aif/fuel ratios.The sensor without doubt senses negative pressure as well as positive and the differential is telegraphed to the ecu, So, On that theory, the partial obstuction would adversely affect any possible accuracy. This falls in place with the duct having been left off. No, or very little air volumne was detetected by the sensor, so there was no need for fuel. Well, anyway. If the maf is dirtyon the sensing surface. The dirt is obstructing the readings. Trythis for information purposes, thry cleaning the sensing surface with 409, rinse off and driy as best you can. Nothing to lose but a bad sensor. Or just replace it, it's relatively inexpensive and easy to change, Good luck - Ned

  • Ned C Cook
    Ned C Cook Jun 19, 2009

    I seiously doubt it's the ECM. At the cost of one you can take the chance on a Maf sensor many many times. Since you had removed the duct and it had some effect, I'm not only into figuring these new cars out but also how to do it inexpensively..Let's do this, A MAF is over 100 ,00, so we won't get hasty about "replace". Have someone pull the maf sensor off and get a can of carburetor cleaner and wash that evil thing out. Takecare to rinse and not fill any holes or orifices. Just flush those out and spray rinse evrything thing else. The cleaner is fast drying and remember to inver tht ppart or flush through but fill no orifices. Let nme know how you do, Good luck, Ned

  • Ned C Cook
    Ned C Cook Jun 19, 2009

    The maf sensor is about 6 inches long and aluminium. I have a picture of one if you would like to have it I need a phone no. "cell" to send it -Ned

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