Check engine light flashing running very rough especially on acceleration

First your car is an OBDII ready, it is easy to pull a code so I can help, check engine lite flashing usually means you have a dead misfire, you will be able to figure what cylinder is in trouble 1-3-5 are on back (fire wall) and 2-4-6 on front(radiator) when a knock sensor is bad usually lite stays on, hope this will help.

This sounds like a problem I had. It turned out to be the Knock Sensor and if not changed soon, it will damage your alternator, A/C and battery. Without it the car will not have enough power to function properly. The first step you need to take is to look for the diagnostic box under the hood. Use a piece of wire to bridge E1 and TE1. Turn on the ignition, do not start the car and check the engine light. Count the number of times it flashes. Mine was five flashes followed by a pause and then two more flashes. Code 52 represents the knock sensor. The knock sensor looks somewhat like a plug and is located in the middle of the back of the engine block. You can reach it without jacking the car. Use a mirror to have a look at it.

You can purchase one online and install it yourself. Just disconnect the battery lead before you do so.

I hope this was helpful.

Sound like you need a tune up ..or if your motor blown a flashing light mean bad then a steady light... you need to get the code for that and tell us about it if you need to know where your code plug is it on the driver side change box I call it ..you need to pull that out and your see it use a code reader or can be a injector too for the fuel.....one or two when bad...

The flashing light usually means the problem is serious enough to damage the catalytic converter. Have you checked the engine computer for trouble codes yet ?