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2001 buick regal rough idle, hard starting

I have an 01 buick regal that started starting hard a couple days ago so i took the mass airflow sensor out and cleaned this with the correct cleaner. this solved the problem for a few days and now again today and started hard and wont idle on its own. would i just have to replace the mass airflow sensor?

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5 Suggested Answers

emissionwiz
  • 61037 Answers

SOURCE: Mass Airflow Sensor 2005 Chevy Malibu. 2.2 ltr.4 cyl.

The MAF is in the flex hose that delivers air to the engine, it has a 5 or 6 wire connector going to it.

Posted on Nov 19, 2008

  • 1214 Answers

SOURCE: 2003 Tahoe Running rough, Idle irratic, Ck engine

Yes, replace the MAF, then check if the lean condition goes away. It should.

MAF's are sensitive to cleaning. Sometimes it works, other times it doesn't.

Posted on Dec 11, 2009

  • 105 Answers

SOURCE: 2000 LeSabre starts but runs very rough and stalls. After

My 2002 Lesabre (app 115000 miles) started something like this. Also the loose gas cap had been coming on for quite a while. I replaced the vacuum line from the air intake to the fuel sensor. It is under the engine cover (twist off the oil filler to remove the cover). There are two hoses together that come of the air intake. The small one goes to the top of the engine. The other goes across the front and makes a 180 turn back to the sensor. Chances are the 180 piece is cracked. It all comes from the dealer as one unit. $25
Seems to have fixed my problems. So if your car is running a little rough. Shutters under load. If the gas cap loose is coming on or probably a number of symptoms this might be the answer. I would replace this item. A cheap try.

Posted on Mar 12, 2010

  • 196 Answers

SOURCE: 97 buick lesabre 3.8 Idles rough and stalls out.

ignition system not operating properly ,or intake air leak ...crank engine get a can of staring fluid spray around the intake if the motor idles up you got a leak hope this helps

Posted on May 08, 2010

emissionwiz
  • 61037 Answers

SOURCE: I have a 1991 Buick Park Avenue. Runs rough in

Here are the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours.
To correct this problem I want you to get a can of intake cleaner (ABOUT $5.00) from any local auto parts store like NAPA or Carquest, do not use carburetor spray, intake cleaner only or u will damage the Teflon coating inside the throttle valve and air bypass valve, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on May 25, 2010

Testimonial: "Thank you, I'm sure if your advice it was I'm looking for. But at least if this works, it will save me a lot money from having to replace expensive sensors."

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Idles bad


not knowing anything about your vehicle, I can only advise the symtoms. Rough idle can be 1 of 2 things. More then likley it's the Air/Fuel temp sensor and this should be on the Air filter case. Since you said the case was off the wires cold have been damaged or the sensor could have damaged. This would also give bad perfomance. Second could be Map sensor or mass airflow. They do the same thing but are located in diffrent places. If it's the Mass Air Flow it will be in the ducting from the Air Case to the Intake. This would cause bad idle and even dieing. You prob wouldn't get far if this were the case. I am leaning more twards the first one. (Air/temp sensor.)

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