Where is the fuel filter on a 1991 buick park avenue? Is there a good site you would recomend to get a diagram and a walk through of how to replace this piece.. Thanks..:)

On this websites you find fuse box diagram and description for Buick Park Avenue (1993)

Buick Park Avenue 1991 1993 fuse box diagram CARKNOWLEDGE

https://www.autogenius.info/buick-park-avenue-1991-1993-fuse-box-diagram

Have your mechanic check the fuel pressure. It could be either the fuel pressure regulator or the fuel pump. Any check engine lights?

I would check the fuel pressure first. On a 91 Pa it should be somewhere between 40 and 45 psi.

Hi

First off the fuel filter is usually located in the under body, under the rear passenger door. Best tools to use. I recommend two open end wrenches of the correct size. Always turn counterclockwise when loosening.

If the filter has been under there for a well, you might want to use some liquid wrench or WD 40. Saturate the bolts really good about 48 hours before repairs, on a 19 year old car, you'll probably be glad you did. No special procedure, it's self explanatory, installation is the reverse of removal.

For safety make sure you first relive the pressure in the fuel system before disconnecting the fuel line. Under the hood, on the fuel rail assembly, and behind the port that holds the fuel pressure regulator in place, is the metal valve stem that acts as the fuel system pressure relief valve. Take the valve cap cover off and push the pin in to relieve the fuel pressure. Maybe having a plastic bottle to catch the gas that will escape would be a good idea.

Always safety first. Hope this helps.

ive had this problem before and it was a small wire on the ignition key cylinder that had broken but we fixed it by buying a new cylinder and wire

Get your converter flow checked. When is the last time you did a tune up??

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

Check out this link. It may help you with your problem.

Fig. 1: The fuel filter is tucked away on the right side frame rail under these hoses


Fig. 2: Fuel filter with flare nut fittings

Fig. 3: Fuel filter with quick connect fittings

You will need a fuel pressure gage that you can purchase any Auto parts store. The schradder valve is on the fuel rail. You may have to remove the plastic cover which should consist of a 10 mm wrench to access the valve. 37psi would be a good number to have...good luck.

Alldata has them...I thing they charge you around $20 a year for the vehicle.