1/7/2024 0 Comments Mercury sable![]() There are many reasons why a fuel injector may go bad, as well as different symptoms relative to how they went bad. If a fuel injector is not operating properly, it will either let too much or too little fuel into the combustion chamber relative to the amount of air. Your Mercury Sable’s fuel injection system atomizes the fuel into a fine mist. The mixture would be wrong at all RPM, but as the engine speed increases the shaking decreases. A super lean running engine will often shake when idling. If an oxygen sensor goes bad, it can make your Sable run too lean (or rich). The heat of the exhaust can also bake the wiring going to/from them over time. They deal with super hot exhaust that can cover them in deposits that can leave them ineffective. Of all the sensors equipped in your vehicle, the O2 sensors may have it the hardest. The oxygen sensors that are equipped in your Mercury Sable are responsible for monitoring the exhaust to help the ECU determine the correct air/fuel mixture. It’s readily accessible, sometimes the problem, and super cheap and easy to replace. In fact, if your check engine light isn’t on at all, checking out the air filter would be a great place to start. It could be so clogged that there is not enough air getting through for proper idle conditions. If you have reason to suspect that your Sable’s air filter has not been changed in a very long time, or if you have recently been driving in tough conditions, it may be worth taking a look at it. Here’s more a whole article on timing chain jumped symptoms, if you have reason to believe this could be your problem. If this happens it can cause the idle characteristics to change. If the timing belt or chain has jumped a tooth, the camshaft(s) and crank will no longer be lined up properly. If the tachometer is rock steady, and the shaking seems worse in gear than out of gear, that’s a pretty good indication of a bad motor mount. It would also feel a little wobbly as the gears are shifted.Īn engine misfire is the most common cause of a shaking idle, and as the engine stumbles and misfires, that should be seen in the tachometer as a drop in RPM. You should also feel the shaking more in gear than when you are in park. If they wear out, it can cause it to shake when idle. Your Sable’s motor mounts connect it to the chassis. Here’s a good YouTube video on how to do just that. If the vacuum system gets a leak, it will cause a shake when idle.Ī vacuum leak can be caused by a bad vacuum hose, intake manifold gasket, and other vacuum powered accessories. Your Sable’s engine creates vacuum when running. Here’s a great video on how to diagnose bad plug wires with a multimeter. Spark Plug Wires– While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your Sable happens to have them, they can go bad and cause a rough idle.Really, your Sable will be running rougher at any RPM, but a misfire will be most pronounced at idle. If a coil pack goes bad, it’ll cause a misfire and rough idle condition. These packs are fired by the engines computer at exactly the right time to provide the optimal ignition timing. Ignition Coil Packs– Nearly all model years and engines use coil packs.This page has a great chart for you to compare your spark plug condition to new plugs. Although most modern vehicles use iridium spark plugs, they still need to be changed at the manufacturers recommended interval. Spark Plugs– One of the absolute most common causes (if not the most common reason that your Sable may be shaking) is the spark plugs.Fouled plugs can cause a misfire, which in turn causes an idle shake. Here are the main components of the ignition system, as well as what would cause them to make your Sable shake when idling. If a good spark is not achieved, your Sable will shake as it misfires and tries to stay running. The ignition system is responsible for burning the air fuel mixture that enters the combustion chamber. With these diagnostic codes you’ll know which sensor is reporting a problem and by addressing it, hopefully it’ll fix your shake at idle speed. Alternatively, most auto parts stores also provide the scan free of charge. Before you go trying to figure out which one is causing your Sable to feel like it’s on spin cycle, make sure that the check engine light isn’t on. There are a lot of reasons why your Sable may shake when idle. Mercury Sable Shaking When Idling Diagnosis ![]() We’ve lined out some of the most common causes below. If your Sable has this problem, there are many issues that can cause it. It can feel like the whole thing is going to vibrate to death with you in it. It can be a very jarring feeling when your Mercury Sable shakes when at idle.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |