A quad driver is what turns the fuel injector on and off. They're part of the PCM and are not replaceable separately. You have to buy a rebuild PCM. BUT, do not do that until you find out WHY the quad drivers went bad. Usually it's caused by a short in the fuel injector coil windings or a short in the harness. If you don't fix it and just replace the PCM, you'll burn out the new PCM
SOURCE: trunk hinges for my 1993 buick regal
I suspect you broke a torsion spring in the trunk. This can be replaced by you, but you won't be happy if it snaps you.
SOURCE: 1999 buick regal codep0305
Cylinder number 5 is misfiring. Check spark plug, spark plug wire and ignition coil for the number 5 cylinder. The number 5 cylinder is the closest to the front of the car on the drivers side. With engine running in dark (at night) take a spray bottle of water and lightly mist spark plug wires and coil and look for arcing. Autozone will test coil for free.
SOURCE: Need diagram of 1993 Buick Regal Gran Sport suspension
try www.autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you or you can try www.schramauto.com or call them at 1-800-292-1032
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