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Sedans Buick LeSabre Buick LeSabre Starting/Stalling Problems
172 messages, Last post on Dec 23, 2009 at 5:51 PM
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Replying to: slightlines (Sep 24, 2007 4:18 pm) I don't recall if the cam sensor or the crankshaft sensor is needed for the basic spark signal. But I'm guess the camshaft is not turning or is way off calibration. Mileage is low for a failure though. Maybe near 200K it might happen.
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Replying to: imidazol97 (Sep 24, 2007 4:29 pm) I'll be sure to do that. |
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Replying to: imidazol97 (Sep 24, 2007 4:29 pm) 
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Replying to: intimidatorjd3 (Sep 25, 2007 4:46 am) Or you might have low fuel pressure Or you might have an electonic ignition problem Or you might have a MAF sensor that's coated with goop giving bad readings.
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Replying to: imidazol97 (Sep 25, 2007 2:05 pm) |
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Replying to: intimidatorjd3 (Sep 25, 2007 2:47 pm) The three coils are independent. Random misfires could be water fouling the plugs.
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Replying to: imidazol97 (Sep 25, 2007 5:23 pm)
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Replying to: intimidatorjd3 (Sep 26, 2007 9:02 am) I can get you a description of doing it. I have helped. It is doable if you work carefully and slowly and label the small screws and things that come out so you know where they go back. Unbolting the brackets for the injectors and wiggling the to get them loosened so they pop out for you is the most tedius. The exhaust crossover pipe does not have to be removed if yours is like the 98 I helped work on. The throttle body is held on the end of the UIM by 3 small bolts. One is partially blocked by a small black bracke that helps lift the weight of the throttle body. That bracket can be tapped toward the front of the car out from under the small bolt and then it can be accessed straight on from the right. You will have to decide whether you are going to redo the gaskets between the lower metal intake and the block/heads. If so it becomes a bigger job with more tedious pieces. The car I worked on did not change them. The Dorman UIM sold by Advance Auto and others has replacement EGR pipes that come up out of the Lower Intake Manifold and carry the hot gases through part of the Plastic UIM. These are smaller than the originals and leave more room around the outside for intake air coming into the manifold to cool the pipe and the plastic. I'd recommend that kit. The little pipe is a press fit into the aluminum LIM plate. |
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Replying to: intimidatorjd3 (Sep 26, 2007 9:02 am) Drain the oil even if you're not ready to work on it and put in a few quarts of cheap oil to flush out any coolant. Expect the spark plugs to need replacing also. They can be salvaged by cleaning while they're out. But if you're due for plugs, just change them. Occasionally people complain that oxygen sensors are damaged by coolant going out the exhaust. Dn't change it unless there are symptoms afterwards. |
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