Engine misfire
 Engine Misfires can be very difficult to diagnose If the engine is misfiring, it can cause all sorts of problems. The engine misfires, you will lose power, your gas mileage will drop and the vehicle can even fail emissions. Cylinder misfires are one of the most common causes of emission failures on cars now a day. If the engine is running perfect and all of the cylinders are “firing” you could say there is no misfire. Once the air fuel ratio inside the combustion chamber in any of the cylinders gets interrupted, the engine will misfire. One cylinder can misfire or more than one cylinder can misfire depending on the situation. What causes a cylinder to misfire?

Basically, it's one of three things: loss of spark; the air/fuel mixture is too far out of balance to ignite; or loss of compression.   The sensible method is to gather available knowledge about the engine misfire, focus on steps necessary to eliminate suspects and let the process guide you to its cause. If your car or truck is computer-controlled, the place to start is to plug in A code reader, there available at parts stores, this will permit you to jack into the engine-control unit (ECU) and get a dialog of what’s up, what’s wrong and where it’s happening. The ECU can’t always tell you what specific part is broken though. Identifying the misfiring cylinder is the very first thing that has to be done to successfully find the exact cause of the misfire.  There is a way to find out which cylinder is misfiring without the aid of misfire dtc's... and it involves doing a cylinder balance test.  CALL AUSTIN, ROUND ROCK, PFLUGERVILLE CASH FOR CARS AT 512-221-1747