2000 Buick Saga


Old 06-25-08, 01:48 PM
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Join Date: Mar 2008
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2000 Buick Saga

2000 Buick LaSabre with 3.8L V6
>Surging/losing power at 60/65 MPH. Sometimes it completely dies. Pull over and it restarts.
>No service engine light comes on.
>In the shop for 3 days and they could not figure out what was wrong. They said the catalytic converter may be partially plugged. Took it to an exhaust shop and they said converter was fine.

This got me to wondering why no service engine light so I unplugged the MAP Sensor, MAF sensor, and the EGR valve Still no service light. Shouldn't I be getting one?
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Old 06-25-08, 03:52 PM
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Did anyone even bring up the subject of the fuel pump?
Old 06-25-08, 05:32 PM
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With the items you disconnected you should have immediately gotten a light. Does your check engine light come on for the bulb check when you turn the key on and start your vehicle? The question is, why did the shop tell you the cat may be bad and didnt give you a definative answer on that and then the exhaust shop could tell you for sure that it was ok? Something doesnt sound right there. Seems in 3 days they didnt do much testing.
Hope this helps ya,
Old 06-25-08, 06:46 PM
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Yes, Billys68SS, I do have a service engine light when the key is first turned on and it goes out when the engine is started. That is what has me stumped, why doesn't it come on when a fault condition is simulated, like unplugging the MAF sensor?
And no, Ecman51, the shop made no mention of the fuel pump.
I am taking it to another shop Monday. Maybe they will do a better job for me.
Old 06-25-08, 06:57 PM
Join Date: Jun 2008
Location: Maryland
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You know, there are data recorders that shops can lend you so they can record and then dump the data as to what happened just before the fault appeared.
Great for intermittents.
Old 07-11-08, 01:04 PM
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2000 Buick Saga Update

Well Guys, the last shop I took the car to could not figure out what was wrong with it either. They told me to take it to a Buick dealer. I did and they diagnosed it as a bad crank sensor and they fixed it. Runs like a top now. Thanks for everyones input.

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