Question about 1986 Lincoln Town Car
It may not be bad gas, but it could be the wrong octane rating for that engine. Check your owner's manual and see what octane is recommended for that engine. If you're running 87 octane and it requires 91 or higher octane, then you need to be running the higher octane fuel. By running lower octane fuel in an engine that requires higher octane, your getting pre-ignition, the knocking sound you hear. What's happening is that as the piston moves up on the compression stroke, the gas/air mixture is compressing and as the pressure goes up, so does the temperature of that mixture. It's possible that temperature can get so hot that the gas/air mixture ignites from the high temperature and not from the spark plug. Higher octane fuel will help this since higher octane fuel is harder to ignite. I say try running some 92 or higher octane fuel in your car and see if you still hear the knocking.
Posted on Jun 06, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 31, 2016 | Ford F-250 Cars & Trucks
Dec 14, 2016 | Cars & Trucks
Sep 15, 2011 | 2006 Kia Spectra
Sep 10, 2011 | 1997 Chevrolet S-10 Pickup
Oct 26, 2010 | 2000 Ford Windstar
Feb 05, 2010 | 2002 Mercury Grand Marquis
Aug 19, 2009 | 2003 Ford F150 Regular Cab
Jun 26, 2009 | 1992 Ford Crown Victoria
May 20, 2009 | 2003 Dodge Ram Maxi
Mar 07, 2009 | 1966 Ford Mustang
247 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: