My diagnostic tool says I have a random misfire, how do I repair this problem?

Answer by  ross1976 (196)

Get the EGR valve checked. It should be closed when the engine is cold or idling and open when it is warm or accelerating. a problem here could also cause a random misfire.

Answer by  sleepyjey (248)

Clean up your fuel injectors and most probably the problem will be solved. A clogged injector causes erratic fuel supply to the engine and random misfires.

Answer by  vishal (28)

If you're handy and want to do it yourself, you can buy the cable, and download the software free from the site below. However, without the factory manual you won't know which parameters to monitor, or know how to interpret the data.

Answer by  digmyspace (249)

Check for a vacuum leak in the intake manifold and throttle body. A vacuum reading of less than 15 inches can indicate a vacuum leak or a problematic valve that is causing the random misfire. You can find this by carefully listening to your engine.

Answer by  sdblack99 (329)

This is quite common in many cars. This can be due to a few things but is almost always the coil pack. Coil packs can be replaced easily.