Question about 1991 Buick Park Avenue

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Engine will not start

No spark to the spark plugs. car is fueled and the fuel pumb is working. engine started to run rough at low speeds, but with high rpms would run smooth pulled off on an off ramp stopped and the engine stopped and refuses to start. engine spark plugs in good condition. wiring appears to be good condition

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The 3.8 engine has an electronic control module under the coil pack that commonly fails.
The harness connecting to that unit is also often the culprit of many ignition problems ... its wiring harness fills with water or other corrosives and rots away. So be nice when removing it from the coil/ignition module... There are numbers visible w/o removing it you will need when searching for one to replace it... 1668994 or something like that... you may want to check prices for a used ignition module/coil pack at car-part.com or mypartshop.com... and try a used one to start...

Posted on Nov 16, 2008

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Http://www.fixya.com/cars/t1810766-1991_buick_park_avenue_stop_running

Check out this link as well. It might be helpful

Posted on Apr 23, 2009

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Fuel delivery (fuel mixing with air to burn and making it to the spark plugs)

Ignition (lighting the fuel on fire)

Compression Building up pressure to fire the fuel
_______________________________

It is possible your engine could have low compression if it has ever been run low on coolant or oil. The engine might spin or turn over but not have fire at the spark plugs. If you are correct that the spark plugs have fire but it will not "kick" or run then fuel delivery is where I would start. See if your fuel rail has fuel in it by pressing the fuel rail valve:
barterjoe_12.jpg
If you have fuel there under a good amount of pressure see if one of the plugs smells like gas after cranking. If so the problem is not the fuel, move on.
If you don't have fuel at the Schrader valve the problem is in the fuel pump and system.
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Good luck
barterjoe_21.png

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