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1993 Grand Marquis keeps lurching forward when driving. Acceleration is very poor because of this. Sometimes the check engine light will come on when it lurches and sometimes it won't.

Just changed Trany fluid 1 month ago. Seems to be worse when roads wet/snowy. Other suggestions have been: Mass Air Flow Sensor, Clogged fuel filter, or EGR valve?

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The other suggestions & more --would be a good place to start
some testing

So do that

Have things tested

Posted on Dec 10, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

keithheavili
  • 410 Answers

SOURCE: Engine will not idle, stalls at stop lights etc - EGR code

To me if the engine will not idel and stall once you have stopped, that points to an IAC (Idle Air Control sensor) which is located on your throttle body.  The part is very easy to get to and changes out pretty quickly.  Hope this helps.  Thanks for an honest rating and for using FixYa!

Posted on May 20, 2009

SOURCE: 1999 pontiac grand prix . will not run

If wiggling the wires cured the code, then one of the wires is broken inside the insulation. Pull on each wire one at a time. look for the colored insulation to stretch, this will be the broken wire. For the other car that wont rev up, this is a common when the catalytic concverter is plugged up. This will also cause MAF codes, and in turn, TRAC OFF light.
See http://www.greatautohelp.com

Posted on Oct 17, 2008

  • 135 Answers

SOURCE: Need Mass Air Flow Sensor for my 1997 Buick LeSabre Custom

not unless you take it to autozone and have them put the scanner on it and clear the code which caused the light to come on. also they can tell you what the original issue was.

unfortunately it sounds like you just started to replace parts and honestly you could have already repaired the issue

Posted on May 04, 2009

  • 6 Answers

SOURCE: saab 2006 1.9tid 150 acceleration problems to 2000

This is usually the first (cheapest) place to start. The MAF (mass air flow) meter is designed to sense and adjust the vehicle engine to changes in air temperature, speed, density etc. to keep your vehicle running properly. Since you already had your EGR replaced (yet another possible source of this sort of problem) I would tend to lean more toward the MAF. If you run any sort of aftermarket intake such as a k&n etc. these can cause problems for certain vehicles that are very sensitive to air flow as Saabs tend to be. Also the oil used on filter elements such as k&n can ruin the sensitive MAF. This unit is generally easy to fix (it's the little box with wires running to it) mid way up your air intake tube just past the filter. They aren't too terribly expensive either. Try this and hopefully this gets you up and running.

Posted on Dec 12, 2009

  • 1 Answer

SOURCE: The car is running poorly and missing when hitting the gas pedal

It's your fuel sending unit.

Posted on Mar 26, 2010

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