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Dave Nova
Dave Nova, Buick Technician
Category: Buick
Satisfied Customers: 19452
Experience:  ASE Master Certification. GM World Class Certification
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I have a 2000 buick park avenue 3.8L 225,000 miles. least 2

Customer Question

I have a 2000 buick park avenue 3.8L 225,000 miles. For at least 2 months while driving when you push down on the gas pedal i can hear a noticeable solid tone coming from passenger side in front. The second you let off the gas the tone disappears. Wednesday morning i remote started the car from the house. After 5 or 6 minutes i went to my detached garage & drove the car out to the back door. It was running fine. I shut it off & went back in the house to finish getting ready for work. It was cold outside (8 deg wind chill -2) An hour later i remote started it again. After a couple minutes when i went out i noticed it wasn't running. I got in & tried to start it. After several attempts it barely would run, sputtering and rough. My first thought was gas line freeze. It died a few times and was hard to restart. Eventually it started & seemed to run a bit better so i thought driving might help. I turned out of the driveway & it died again & wouldn't restart. Later i pushed it back into the garage & heated the garage to plus 60 for several hours. After that it would barely start & run for a minute. Later i learned the ECM is located inside the car, inside the passenger side wall. I'm thinking the ECM went bad ? Also i have 2 key fobs that the car identifies as driver 1 or driver 2 depending on which is used. When i use either one now "unidentified driver" flashes on dashboard. I used a code reader to try and find any codes. Only code to come up is P0461 which identifies fuel level indicator. The gas gauge has not worked correctly since i bought the car 10 months ago.
Submitted: 1 year ago.
Category: Buick
Expert:  Dave Nova replied 1 year ago.

Try disconnecting the mass airflow sensor connector at the intake manifold. Then attempt starting. Does the engine start easily and continue to run?

Customer: replied 1 year ago.
Disconnected it but same thing. It will not even start
Expert:  Dave Nova replied 1 year ago.

Remove one of the plug wires at the coils and crank the engine. Do you get spark from the coil while cranking?

Customer: replied 1 year ago.
there is spark
Customer: replied 1 year ago.
Hi, did you get my last answer ?
Expert:  Dave Nova replied 1 year ago.

Do you hear the fuel pump run when the key is turned on?

Customer: replied 1 year ago.
No, but i never have heard it run.
Expert:  Dave Nova replied 1 year ago.

Will the engine run on starting fluid?

Customer: replied 1 year ago.
Haven't tried that. I will
Customer: replied 1 year ago.
No, will not start. Nothing different
Expert:  Dave Nova replied 1 year ago.

Pull a few spark plugs are they wet with fuel?

Customer: replied 1 year ago.
Well i didn't hear from you for a couple days so my car is scheduled to go into the repair shop monday. Never did get your thoughts on if it could be the ECM.
Expert:  Dave Nova replied 1 year ago.

ECM failure is a possibility, but a remote one. We do not see many ECM failures. most common failures on this car that would cause stalling or a no start condition would be the crankshaft position sensor or the ignition control module.

Customer: replied 1 year ago.
It turns out it was the mass air flow sensor was bad. It's fixed & back on the road.
Expert:  Dave Nova replied 1 year ago.

Good to hear you got the problem solved. That is what I suspected in the beginning. That is why I had you unplug the sensor and run the engine. Normally when the sensor is bad the engine will run better with it unplugged.