Extremely bad gas mileage maybe only 3 to the gallon

Asked by Bubbuh Aug 03, 2020 at 03:16 PM about the 1994 Buick Century Special Sedan FWD

Question type: Maintenance & Repair

I’ve recently parked my car because it has been
guzzling gas like crazy I have no idea why... it needs
a full tune up and a cv axle... I drove it less than 20
miles and got to an empty tank by the time I got
home... HELP ME PLEASE

2 Answers

25,625

Check for fuel leaks.

1 people found this helpful.
14,720

A tune-up isn't a bad idea. Use a gage and check for proper fuel pressure, 3.1L, key on engine off, 40--47 psi. once you build up pressure, turn off the key, see if fuel pressure holds for a bit? If the pressure drops like a rock, check for a leak. Check fuel pressure regulator, check vacuum line on regulator, if it has gas in it, the regulator is faulty. The regulator is usually located on the fuel rail. Have you checked for fuel line leaks?? Any applicable trouble codes? If your obd1 compliant you should be able to check some codes, yourself, if the cel still works? You can smell of your crankcase oil dipstick, if it smells like gas either you don't change oil and filter very often or you have a fuel leak. Some of the national brand auto stores will loan out a fuel pressure gage, you may have to put up a deposite, but, you get it back when you return the gage.

1 people found this helpful.

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